Yasuyuki Hikita

Staff Scientist

Stanford Institute for Materials & Energy Sciences (SIMES),
SLAC National Accelerator Laboratory

Contact
476 Lomita Mall, McCullough Building,
Stanford University, Stanford, California 94305-4045
Phone: (+1) 650-724-5379
Email: hikita[at]stanford.edu
   

Education

September 2007

    Ph.D. in Science, University of Tokyo, Japan

March 2003

    M.S. in Science, University of Tokyo, Japan

March 2001

    B.S. in Engineering, University of Tokyo, Japan

Positions

2015 -

    Staff Scientist, Stanford Institute for Materials & Energy Sciences, SLAC National Accelerator Laboratory, USA

2011 - 2015

    Associate Staff Scientist, Stanford Institute for Materials & Energy Sciences, SLAC National Accelerator Laboratory, USA

2007 - 2011

    Assistant Professor, Department of Advanced Materials Science, University of Tokyo, Chiba, Japan [ Link ]

2004 - 2007

    Research Assistant, Center of Excellence (COE) for "Applied Physics on Strong Correlation", University of Tokyo, Tokyo, Japan

2003 - 2004

    Researcher, Mitsubishi Research Institute Inc., Tokyo, Japan [ Link ]

Honors

2007

    Materials Research Society Graduate Studentfs Gold Award

2007

  Japan Society of Applied Physics Young Scientist Award for the Presentation of an Excellent Paper

Research Interests

- Application of atomic scale engineering in oxide heterostructures to catalytic activities.

- Probing transition metal oxide artificial interfaces for electronic device applications.

- Atomic scale synthesis and control of complex oxide heterostructures by pulsed laser deposition.

Recent Publications

2018

M. Osada, K. Nishio, H. Y. Hwang, and Y. Hikita, gSynthesis and electronic properties of Fe2TiO5 epitaxial thin films,h APL Mater. 6, 056101 (2018).

B. S. Y. Kim+, M. Minohara, Y. Hikita, C. Bell, and H. Y. Hwang+, gAtomically engineered epitaxial anatase TiO2 metal-semiconductor field-effect transistors,h Appl. Phys. Lett. 112, 133506:1-4 (2018). Editors-pick

A. G. Swartz*, H. Inoue*, T. A. Merz, Y. Hikita, S. Raghu, T. P. Devereaux, S. Johnston, and H. Y. Hwang, gPolaronic behavior in a weak coupling superconductor,h PNAS, in print (2018).

D. Lu, Y. Hikita, D. J. Baek, T. A. Merz, H. K. Sato, B. Kim, T. Yajima, C. Bell, A. Vailionis, L. F. Kourkoutis, and H. Y. Hwang, gStrain Tuning in Complex Oxide Epitaxial Films Using an Ultrathin Strontium Aluminate Buffer Layer,h Phys. Stat. Solidi RRL, 1700339:1-6 (2018).

2017

S. S. Hong, J. H. Yu, D. Lu, A. F. Marshall, Y. Hikita, Y. Cui, and H. Y. Hwang, "Two-dimensional limit of crystalline order in perovskite membrane films," Science Advances 3, eaao5173:1-5 (2017).

Y. Frenkel, N. Haham, Y. Shperber, C. Bell, Y. W. Xie, Z. Y. Chen, Y. Hikita, H. Y. Hwang, E. K. H. Salje, and B. Kalisky, "Imaging and Tuning Polarity at SrTiO3 Domain Walls," Nature Mater., 16, 1203-1208 (2017).

D. J. Baek, D. Lu, Y. Hikita, H. Y. Hwang, and L. F. Kourkoutis, "Mapping Cation Diffusion through Lattice Defects in Epitaxial Oxide Thin Films on the Water-soluble Buffer Layer Sr3Al2O6 using Atomic Resolution Electron Microscopy," APL Materials 5, 096108:1-8 (2017).

D. J. Baek, D. Lu, Y. Hikita, H. Y. Hwang, and L. F. Kourkoutis, "Ultrathin Epitaxial Barrier Layer to Avoid Thermally Induced Phase Transformation in Oxide Heterostructures," ACS Appl. Mater. Interfaces 9, 54-59 (2017).

T . Tachikawa, H. Y. Hwang, and Y. Hikita, "Enhancing the Barrier Height in Oxide Schottky Junctions Using Interface Dipoles," Appl. Phys. Lett. 111, 091602:1-4 (2017).

M . Minohara, Y. Hikita, C. Bell, H. Inoue, M. Hosoda, H. K. Sato, H. Kumigashira, M. Oshima, E. Ikenaga, and H. Y. Hwang, "Dielectric collapse at the LaAlO3/SrTiO3 (001) heterointerface under applied electric field," Sci. Report 7, 9516:1-7 (2017).

2016

C. Zhang, Z. Liu, Z. Y. Chen, Y. W. Xie, R.-H. He, S. Tang, J. He, W. Li, T. Jia, S. N. Rebec, E. Y. Ma, H. Yan, M. Hashimoto, D. Lu , S.-K. Mo, Y. Hikita, R. G. Moore, H. Y. Hwang, D.-H. Lee, and Z.-X. Shen, "Ubiquitous strong electron phonon coupling at the interface of FeSe/SrTiO3," Nature Communications 8, 14468:1-6 (2016).

D. J. Baek, D. Lu, Y. Hikita, H. Y. Hwang, and L. F. Kourkoutis, "Ultrathin Epitaxial Barrier Layer to Avoid Thermally Induced Phase Transformation in Oxide Heterostructures," ACS Applied Materials & Interfaces 9, 54-59 (2016).

D. J. Gray, Jr., T. A. Merz, Y. Hikita, H. Y. Hwang, and H. Mabuchi, "Orientation-resolved domain mapping in tetragonal SrTiO3 using polarized Raman spectroscopy," Physical Review B 94, 214107:1-8 (2016).

H. Noad, E. M. Spanton, K. C. Nowack, H. Inoue, M. Kim, T. A. Merz, C. Bell, Y. Hikita, R. Xu, W. Liu, A. Vailionis, H. Y. Hwang and K. A. Moler, "Variation in Superconducting Transition Temperature due to Tetragonal Domains in Two-Dimensionally Doped SrTiO3," Physical Review B 94, 174516:1-12 (2016).

Z. Chen, H. T. Yuan, Y. Xie, D. Lu, H. Inoue, Y. Hikita, C. Bell and H. Y. Hwang, "Dual-Gate Modulation of Carrier Density and Disorder in an Oxide Two-Dimensional Electron System," Nano Letters 16, 6130-613 (2016).

D. Lu, D. J. Baek, S. S. Hong, L. F. Kourkoutis, Y. Hikita and H. Y. Hwang, "Synthesis of Freestanding Single-Crystal Perovskite Films and Heterostructures by Etching of Sacrificial Water-Soluble Layers," Nature Materials 15, 1255-1260 (2016).

L. C. Seitz, C. F. Dickens, K. Nishio, Y. Hikita, J. Montoya, A. Doyle, C. Kirk, A. Vojvodic, H. Y. Hwang, J. K. Norskov and T. F. Jaramillo, "A Highly Active and Stable IrOx/SrIrO3 Catalyst for the Oxygen Evolution Reaction," Science 353, 1011 (2016).

F. Gunkel, C. Bell, H. Inoue, B. Kim, A. G. Swartz, T. A. Merz, Y. Hikita, S. Harashima, H. K. Sato, M. Minohara, S. Hoffmann-Eifert, R. Dittmann and H. Y. Hwang, "Defect Control of Conventional and Anomalous Electron Transport at Complex Oxide Interfaces," Phys. Rev. X 6, 031035 (2016).

Y. Frenkel, N. Hacham, Y. Shperber, C. Bell, Y. W. Xie, Z. Y. Chen, Y. Hikita, H. Y. Hwang and B. Kalisky, "Anisotropic Transport at the LaAlO3/SrTiO3 Interface Explained by Microscopic Imaging of Channel-Flow over SrTiO3 Domains," ACS Appl. Mater. Interfaces 8, 12514-12519 (2016).

T. A. Merz, H. Noad, R. Xu, H. Inoue, W. Liu, Y. Hikita, A. Vailionis, K. A. Moler and H. Y. Hwang, "Depth resolved domain mapping in tetragonal SrTiO3 by micro-Laue diffraction," Appl. Phys. Lett. 108, 182901 (2016).

K. Nishio, H. Y. Hwang, and Y. Hikita, "Thermodynamic Guiding Principles in Selective Synthesis of Strontium Iridate Ruddlesden-Popper Epitaxial Films," APL Mater. 4, 036102:1-6 (2016 ).

Y. Hikita, K. Nishio, L. C. Seitz, P. Chakthranont, T. Tachikawa, T. F. Jaramillo, and H. Y. Hwang, "Band edge engineering of oxide photoanodes for photoelectrochemical water splitting: Integration of subsurface dipoles with atomic-scale control," Adv. Energy Mater. 6, 1502154 (2016).

2015

H . Inoue*, A. G. Swartz*, N. J. Harmon, T. Tachikawa, Y. Hikita, M. E. Flatte, and H. Y. Hwang, "Origin of the magnetoresistance in oxide tunnel junctions determined through electric polarization control of the interface," Phys. Rev. X 5, 041023:1-7 (2015).

T. Tachikawa, M. Minohara, Y. Hikita, C. Bell, and H. Y. Hwang, "Tuning band alignment using interface dipoles at the Pt/anatase TiO2 interface," Adv. Mater. 27, 7458-7461 (2015).

K . O. Ruotsalainen, C. J. Sahle, T. Ritschel, J. Geck, M. Hosoda, C. Bell, Y. Hikita, H. Y. Hwang, T. T. Fister, R. A. Gordon, K. Hamalainen, M. Hakala, and S. Huotari, "Inelastic x-ray scattering in heterostructures: Electronic excitations in LaAlO3/SrTiO3," J. Phys: Condens. Matter 27, 335501:1-10 (2015).

H. T. Yuan, X. Liu, F. Afshinmanesh, W. Li, G. Xu, J. Sun, B. Lian, G. Ye, Y. Hikita, Z.-X. Shen, S.-C. Zhang, X. Chen, M. Brongersma, H. Y. Hwang, and Y. Cui, "Polarisation-sensitive Broadband Photodetector using a Black Phosphorus Vertical p-n Junction," Nature Nanotechnol. 10, 707-713 (2015).

T. Yajima, Y. Hikita, M. Minohara, C. Bell, H. Kumigashira, M. Oshima, and H. Y. Hwang, "Controlling band alignments by engineering interface dipoles at oxide heterointerfaces," Nature Commun. 6, 6759:1-5 (2015).

T . Yajima, M. Minohara, C. Bell, H. Kumigashira, M. Oshima, and H. Y. Hwang, and Y. Hikita, "Enhanced Electrical Transparency by Ultra-Thin LaAlO3 Insertion at Oxide Metal/Semiconductor Heterointerfaces," Nano Lett. 15, 1622-1626 (2015).

2014

M . Minohara, T. Tachikawa, Y. Nakanishi, Y. Hikita, L. Fitting Kourkoutis, D. A. Muller, M. Yoshita, H. Akiyama, C. Bell, and H. Y. Hwang, "Atomically Engineered Metal-Insulator Transition at the TiO2/LaAlO3 Heterointerface," Nano Lett. 14, 6743-6746 (2014).

Z . Erlich, Y. Frenkel, J. Drori, Y. Shperber, C. Bell, H. K. Sato, M. Hosoda, Y. W. Xie, Y. Hikita, H. Y. Hwang, and B. Kalisky, "Optical Study of Tetragonal Domains in LaAlO3/SrTiO3," J. Supercond. Novel Magn. 28, 1017-1020 (2014).

A . G. Swartz, S. Harashima, Y. W. Xie, D. Lu, B. Kim, C. Bell, Y. Hikita, and H. Y. Hwang, "Spin Dependent Transport Across Co/LaAlO3/SrTiO3 Heterojunctions," Appl. Phys. Lett. 105, 032406:1-4 (2014).

Y . W. Xie, C. Bell, M. Kim, H. Inoue, Y. Hikita, and H. Y. Hwang, "Quantum Longitudinal and Hall Transport at the LaAlO3/SrTiO3 Interface," Solid Stat. Commun. 197, 25-29 (2014).

Y . Yamada, H. K. Sato, Y. Hikita, H. Y. Hwang, and Y. Kanemitsu, "Spatial density profile of electrons near the LaAlO3/SrTiO3 heterointerface revealed by time-resolved photoluminescence spectroscopy," Appl. Phys. Lett. 104, 151907:1-4 (2014 ).

J. A. Mundy, Y. Hikita, T. Hidaka, T. Yajima, H. Y. Hwang, D. A. Muller, and L. Fitting Kourkoutis, "Visualizing the interfacial evolution from charge compensation to metallic screening across the manganite metal-insulator transition," Nature Commun. 5, 3464:1-6 (2014).

Y. Yamada, H. K. Sato, Y. Hikita, H. Y. Hwang, and Y. Kanemitsu, "Photocarrier localization and recombination dynamics in LaAlO3/SrTiO3 heterostructures," Proc. SPIE 8987, 898710:1-7 (2014).

2013

H . Inoue, M. Kim, C. Bell, Y. Hikita, S. Raghu, and H. Y. Hwang, "Tunable Coupling of Two-Dimensional Superconductors in Bilayer SrTiO3 Heterostructures," Phys. Rev. B 88, 241104(R):1-5 (2013).

B. Kalisky, E. M. Spanton, H. Noad, J. R. Kirtley, K. C. Nowack, C. Bell, H. K. Sato, Y. Xie, Y. Hikita, C. Woltmann, G. Pfanzelt, R. Jany, H. Y. Hwang, J. Mannhart, and K. A. Moler, "Locally enhanced conductivity due to tetragonal domain structure in LaAlO3/SrTiO3 heterointerfaces," Nature Mater. 12, 1091-1095 (2013).

S. Harashima, C. Bell, M. Kim, T. Yajima, Y. Hikita, and H. Y. Hwang, "Coexistence of two- and three-dimensional Shubnikov-de Haas oscillations in Ar+-irradiated KTaO3," Phys. Rev. B 88, 085102:1-7 (2013).

Y. Xie, C. Bell, Y. Hikita, S. Harashima, and H. Y. Hwang, "Enhancing electron mobility at the LaAlO3/SrTiO3 interface by surface control," Adv. Mater. 25, 4735-4738 (2013).

M. Hosoda, Y. Hikita, H. Y. Hwang, and C. Bell, "Transistor operation and mobility enhancement in top-gated LaAlO3/SrTiO3 heterostructures," Appl. Phys. Lett. 103, 103507:1-3 (2013).

Y . Yamada, H. K. Sato, Y. Hikita, H. Y. Hwang, and Y. Kanemitsu, "Measurement of the Femtosecond Optical Absorption of LaAlO3/SrTiO3 Heterostructures: Evidence for an Extremely Slow Electron Relaxation at the Interface," Phys. Rev. Lett. 111, 047403:1-5 (2013).

H. K. Sato, C. Bell, Y. Hikita, and H. Y. Hwang, "Stoichiometry control of the electronic properties of the LaAlO3/SrTiO3 heterointerface," Appl. Phys. Lett. 102, 251602:1-4 (2013).

J.-S. Lee, Y. W. Xie, H. K. Sato, C. Bell, Y. Hikita, H. Y. Hwang, and C.-C. Kao, "Titanium dxy ferromagnetism at the LaAlO3/SrTiO3 interface," Nature Mater. 12, 703-706 (2013).

M. Hosoda, C. Bell, Y. Hikita, and H. Y. Hwang, "Compositional and Gate Tuning of the Interfacial Conductivity in LaAlO3/SrTiO3 Heterostructures," Appl. Phys. Lett. 102, 091601:1-4 (2013).

K. G. Rana , T. Yajima, S. Parui, A. F. Kemper, T. P. Devereaux, Y. Hikita, H. Y. Hwang, and T. Banerjee, "Hot electron transport in a strongly correlated transition metal oxide," Sci. Rep. 3, 1274:1-5 (2013).

2012

E . Flekser, M. Ben Shalom, M. Kim, C. Bell, Y. Hikita, H. Y. Hwang, and Y. Dagan, "Magnetotransport effects in polar versus non-polar SrTiO3 based heterostructures," Phys. Rev. B 86, 121104(R):1-5 (2012).

M . Kim, Y. Kozuka, C. Bell, Y. Hikita, and H. Y. Hwang, "Intrinsic Spin-Orbit Coupling in Superconducting δ-doped SrTiO3 Heterostructures," Phys. Rev. B 86, 085121:1-6 (2012).

J . A. Bert, K. C. Nowack, B. Kalisky, H. Noad, J. R. Kirtley, C. Bell, H. K. Sato, M. Hosoda, Y. Hikita, H. Y. Hwang, and K. A. Moler, "Gate-tuned superfluid density at the superconducting LaAlO3/SrTiO3 interface," Phys. Rev. B 86, 060503(R):1-5 (2012).

T . Tachikawa, M. Minohara, Y. Nakanishi, Y. Hikita, M. Yoshita, H. Akiyama, C. Bell, and H. Y. Hwang, "Metal-to-insulator transition in anatase TiO2 thin films induced by growth rate modulation," Appl. Phys. Lett. 101, 022104:1-4 (2012).

B . Kalisky, J. Bert, B. Klopfer, C. Bell, H. Sato, M. Hosoda, Y. Hikita, H. Y. Hwang, and K. A. Moler, "Critical thickness for ferromagnetism in LaAlO3/SrTiO3 heterostructures," Nature Commun. <>3, 922:1-3 (2012).

J . R. Kirtley, B. Kalisky, J. A. Bert, M. Kim, C. Bell, Y. Hikita, H. Y. Hwang, J. H. Ngai, Y. Segal, F. J. Walker, C. H. Ahn, and K. A. Moler, "Scanning SQUID susceptometry of a paramagnetic superconductor," Phys. Rev. B 85, 224518:1-11 (2012).

B . Kalisky, J. Bert, C. Bell, Y. Xie, H. Sato, M. Hosoda, Y. Hikita, H. Y. Hwang, and K. A. Moler, "Scanning probe manipulation of nanomagnetism at the LaAlO3/SrTiO3 heterointerface," Nano Lett. 12, 4055-4059 (2012).

P . D. C. King, R. H. He, T. Eknapakul, S.-K. Mo, Y. Kaneko, S. Harashima, Y. Hikita, M. S. Bahramy, C. Bell, Z. Hussain, Y. Tokura, Z.-X. Shen, H. Y. Hwang, F. Baumberger, and W. Meevasana, "Subband Structure of a Two-Dimensional Electron Gas Formed at the Polar Surface of the Strong Spin-Orbit Perovskite KTaO3," Phys. Rev. Lett. 108, 117602:1-5 (2012).

Y . Kozuka, A. Tsukazaki, D. Maryenko, J. Falson, C. Bell, M. Kim, Y. Hikita, H. Y. Hwang, and M. Kawasaki, "Single-valley quantum Hall ferromagnet in a dilute MgxZn1-xO/ZnO strongly correlated two-dimensional electron system," Phys. Rev. B 85, 075302:1-5 (2012).

T . Yajima, Y. Hikita, M. Minohara, C. Bell, H. Kumigashira, M. Oshima, and H. Y. Hwang, "Controlling Band Alignments by Engineering Interface Dipoles at Oxide Heterointerfaces," Photon Factory News 29, 13-16 (2012). In Japanese.

2011

Y . W. Xie, Y. Hikita, C. Bell, and H. Y. Hwang, "Control of electronic conduction at an oxide heterointerface using surface polar adsorbates," Nature Commun. 2, 494:1-5 (2011).

Y . Wakabayashi, Y. Yamasaki, C. Bell, Y. Hikita, H. Y. Hwang, and T. Kimura, "Growth Temperature Dependence of the LaAlO3/SrTiO3 Interfacial Structure," J. Phys. Conf. Series 320, 012074:1-4 (2011).

H . Wadati, J. Geck, D. G. Hawthorn, T. Higuchi, M. Hosoda, C. Bell, Y. Hikita, H. Y. Hwang, C. Schussler-Langeheine, E. Schierle, E. Weschke, and G. A. Sawatzky, "Electronic structure of the SrTiO3/LaAlO3 interface revealed by resonant soft x-ray scattering," IOP Conf. Series: Mater. Sci. and Engineer. 24, 012012:1-9 (2011).

J . Bert, B. Kalisky, C. Bell, M. Kim, Y. Hikita, H. Y. Hwang, and K. A. Moler, "Direct imaging of the coexistence of ferromagnetism and superconductivity at the LaAlO3/SrTiO3 interface," Nature Phys. 7, 767-771 (2011).

B . Kim, D. Kwon, T. Yajima, C. Bell, Y. Hikita, B. G. Kim, and H. Y. Hwang, "Reentrant insulating state in ultrathin manganite films," Appl. Phys. Lett. 99, 092513:1-3 (2011).

M . Kim, C. Bell, Y. Kozuka, M. Kurita, Y. Hikita, and H. Y. Hwang, "Fermi surface and superconductivity in low-density high-mobility δ-doped SrTiO3," Phys. Rev. Lett. 107, 106801:1-4 (2011).

R . Yamamoto, C. Bell, Y. Hikita, H. Y. Hwang, H. Nakamura, T. Kimura, and Y. Wakabayashi, "Structural Comparison of n-Type and p-Type LaAlO3/SrTiO3 Interfaces," Phys. Rev. Lett. 107, 036104:1-4 (2011).

Y. Hikita, M. Kawamura, C. Bell, and H. Y. Hwang, "Electric Field Penetration in Au/Nb:SrTiO3 Schottky Junctions Probed by Bias-Dependent Internal Photoemission," Appl. Phys. Lett. 98, 192103:1-3 (2011).

H . Sato, T. Higuchi, Y. Hikita, and H. Y. Hwang, "Nanometer-scale epitaxial strain release in perovskite heterostructures using "SrAlOx" sliding buffer layers," Appl. Phys. Lett. 98, 171901:1-3 (2011).

Y . W. Xie, C. Bell, Y. Hikita, and H. Y. Hwang, "Tuning the electron gas at an oxide heterointerface via free surface charges," Adv. Mater. 23, 1744-1747 (2011).

T . Yajima, Y. Hikita, and H. Y. Hwang, "A heteroepitaxial perovskite metal-base transistor," Nature Mater. 10, 198-201 (2011).

T . Higuchi, Y. Hotta, Y. Hikita, S. Maruyama, Y. Hayamizu, H. Akiyama, H. Wadati, D. G. Hawthorn, T. Z. Regier, R. I. R. Blyth, G. A. Sawatzky, and H. Y. Hwang, "LaVO4:Eu Phosphor Films with Enhanced Eu Solubility," Appl. Phys. Lett. 98, 071902:1-3 (2011).

G . Singh Bhalla, C. Bell, J. Ravichandran, W. Siemons, Y. Hikita, A. F. Hebard, H. Y. Hwang, and R. Ramesh, "Built-in induced polarization at the LaAlO3/SrTiO3 interface," Nature Phys. 7, 80-86 (2011).

2010

Y . Kozuka, M. Kim, H. Ohta, Y. Hikita, C. Bell, and H. Y. Hwang, "Enhancing the electron mobility via delta-doping in SrTiO3," Appl. Phys. Lett. 97, 222115:1-3 (2010).

L . Fitting Kourkoutis, H.-L. Xin, T. Higuchi, Y. Hotta, J. H. Lee, Y. Hikita, D. G. Schlom, H. Y. Hwang, and D. A. Muller, "Atomic-resolution spectroscopic imaging of oxide interfaces," Philosophical Magazine 90, 4731-4749 (2010).

J . A. Mundy, L. Fitting Kourkoutis, Y. Hikita, T. Hidaka, H. Y. Hwang, and D. A. Muller, "Charge Transfer at La1-xSrxMnO3/SrTiO3 Interfaces Probed by Spectroscopic Imaging in an Aberration-Corrected STEM," Microscopy and Microanalysis 16, 1398-1399 (2010).

Y . Kozuka, Y. Hikita, C. Bell, and H. Y. Hwang, "Dramatic Mobility Enhancements in Doped SrTiO3 Thin Films by Defect Management," Appl. Phys. Lett. 97, 012107:1-3 (2010).

Y . W. Xie, C. Bell, T. Yajima, Y. Hikita, and H. Y. Hwang, "Charge writing at the LaAlO3/SrTiO3 surface," Nano Lett. 10, 2588-2591 (2010).

B . Kim, D. Kwon, J. H. Song, Y. Hikita, B. G. Kim, and H. Y. Hwang, "Finite size effect and phase diagram of ultra-thin La0.7Sr0.3MnO3," Solid Stat. Commun. 105, 598-601 (2010).

2009

Y . Kozuka*, M. Kim*, C. Bell, B. G. Kim, Y. Hikita, and H. Y. Hwang, "Two-Dimensional Quantum Oscillations in the Normal State of a Superconducting Heterostructure," Nature 462, 487-490 (2009).

S . Tongay, A. F. Hebard, Y. Hikita, and H. Y. Hwang, "Magnetodielectric Coupling in Nonmagnetic Au/GaAs:Si Schottky Barriers," Phys. Rev. B 80, 205324:1-7 (2009).

C . Bell, S. Harashima, Y. Kozuka, M. Kim, B. G. Kim, Y. Hikita, and H. Y. Hwang, "Dominant mobility modulation by the electric field effect at the LaAlO3/SrTiO3 interface," Phys. Rev. Lett. 103, 226802:1-4 (2009).

H . Wadati, D. G. Hawthorn, J. Geck, T. Higuchi, Y. Hikita, H. Y. Hwang, L. Fitting Kourkoutis, D. A. Muller, S.-W. Huang, D. J. Huang, H.-J. Lin, C. Schuessler-Langeheine, H.-H. Wu, W. Schierle, E. Weschke, N. J. C. Ingle, and G. A. Sawatzky, "Resonant soft x-ray scattering studies of interface reconstructions in SrTiO3/LaAlO3 superlattices," J. Appl. Phys. 106, 083705:1-5 (2009).

N . Ogawa, K. Miyano, M. Hosoda, T. Higuchi, C. Bell, Y. Hikita, and H. Y. Hwang, "Enhanced lattice polarization in SrTiO3/LaAlO3 superlattices measured using optical second-harmonic generation," Phys. Rev. B 80, 081106(R):1-4 (2009).

T . Higuchi, T. Yajima, L. Fitting Kourkoutis, Y. Hikita, N. Nakagawa, D. A. Muller, and H. Y. Hwang, "Mn3O4 Precipitates in Laser-Ablated Manganite Films," Appl. Phys. Lett. 95, 043112:1-3 (2009).

H . Wadati, D. G. Hawthorn, J. Geck, T. Z. Regier, R. I. R. Blyth, T. Higuchi, Y. Hotta, Y. Hikita, H. Y. Hwang, and G. A. Sawatzky, "Interface reconstruction in V-oxide heterostructures determined by x-ray absorption spectroscopy," Appl. Phys. Lett. 95, 023115:1-3 (2009).

C . Bell, S. Harashima, Y. Hikita, and H. Y. Hwang, "Thickness Dependence of the Mobility at the LaAlO3/SrTiO3 Interface," Appl. Phys. Lett. 94, 222111:1-3 (2009).

Y. Hikita, M. Nishikawa, T. Yajima, and H. Y. Hwang, "Termination Control of the Interface Dipole in La0.7Sr0.3MnO3/Nb:SrTiO3 (001) Schottky Junctions," Phys. Rev. B 79, 073101:1-4 (2009).

2008

Y. Hikita, L. Fitting Kourkoutis, T. Susaki, D. A. Muller, H. Takagi, and H. Y. Hwang, "Negative Differential Resistance Induced by Mn Substitution at SrRuO3/Nb:SrTiO3 Schottky Interfaces,h Phys. Rev. B 77, 205330:1-6 (2008).

2007

Y . Kozuka, Y. Hikita, T. Susaki, and H. Y. Hwang, "Optically tuned dimensionality crossover in photocarrier-doped SrTiO3: onset of weak localization," Phys. Rev. B 76, 085129:1-6 (2007).

Y. Hikita, Y. Kozuka, T. Susaki, H. Takagi, and H. Y. Hwang, "Characterization of the Schottky Barrier in SrRuO3/Nb:SrTiO3 Junctions,h Appl. Phys. Lett. 90, 143507:1-3 (2007).

before 2006

H . Yamazaki, Y. Hikita, H. Hori, and H. Takagi, "Correlation between the superconducting and structural properties in MgB2 thin films prepared by molecular-beam epitaxy," Appl. Phys. Lett. 83, 3740-3742 (2003).

Y. Hikita, T. Fukumura, T. Ito, M. Kawasaki, and H. Takagi, "Fabrication of MgB2 thin film on Boride Substrates by Pulsed Laser Deposition," J. Low Temp. Phys. 131, 1187-1191 (2003).

Copyright © Yasuyuki Hikita. 2017 All Rights Reserved.