Defect Control of Conventional and Anomalous Electron Transport at Complex Oxide Interfaces

被引:79
作者
Gunkel, F. [1 ,2 ,3 ,4 ]
Bell, Chris [2 ,5 ]
Inoue, Hisashi [6 ]
Kim, Bongju [6 ]
Swartz, Adrian G. [6 ]
Merz, Tyler A. [6 ]
Hikita, Yasuyuki [2 ]
Harashima, Satoshi [2 ,7 ]
Sato, Hiroki K. [2 ,8 ]
Minohara, Makoto [2 ,6 ,9 ]
Hoffmann-Eifert, Susanne [3 ,4 ]
Dittmann, Regina [3 ,4 ]
Hwang, Harold Y. [2 ,6 ]
机构
[1] Rhein Westfal TH Aachen, IWE2, Inst Elect Mat, D-52074 Aachen, Germany
[2] SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, Menlo Pk, CA 94025 USA
[3] Forschungszentrum Julich, Peter Gruenberg Inst, D-52428 Julich, Germany
[4] Juelich Aachen Res Alliance Fundamentals Future I, D-52428 Julich, Germany
[5] Univ Bristol, Sch Phys, Bristol BS8 1TL, Avon, England
[6] Stanford Univ, Dept Appl Phys, Geballe Lab Adv Mat, Stanford, CA 94305 USA
[7] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138654, Japan
[8] Univ Tokyo, Dept Adv Mat Sci, Chiba 2778561, Japan
[9] High Energy Accelerator Res Org KEK, Photon Factory, Tsukuba, Ibaraki 3050801, Japan
关键词
STRONTIUM-TITANATE; MAGNETIC-PROPERTIES; DOPED SRTIO3; LAALO3/SRTIO3; FERROMAGNETISM; STOICHIOMETRY; FILMS; SUPERCONDUCTIVITY; CONDUCTIVITY; CHEMISTRY;
D O I
10.1103/PhysRevX.6.031035
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Using low-temperature electrical measurements, the interrelation between electron transport, magnetic properties, and ionic defect structure in complex oxide interface systems is investigated, focusing on NdGaO3/SrTiO3 (100) interfaces. Field-dependent Hall characteristics (2-300 K) are obtained for samples grown at various growth pressures. In addition to multiple electron transport, interfacial magnetism is tracked exploiting the anomalous Hall effect (AHE). These two properties both contribute to a nonlinearity in the field dependence of the Hall resistance, with multiple carrier conduction evident below 30 K and AHE at temperatures. less than or similar to 10 K. Considering these two sources of nonlinearity, we suggest a phenomenological model capturing the complex field dependence of the Hall characteristics in the low-temperature regime. Our model allows the extraction of the conventional transport parameters and a qualitative analysis of the magnetization. The electron mobility is found to decrease systematically with increasing growth pressure. This suggests dominant electron scattering by acceptor-type strontium vacancies incorporated during growth. The AHE scales with growth pressure. The most pronounced AHE is found at increased growth pressure and, thus, in the most defective, low-mobility samples, indicating a correlation between transport, magnetism, and cation defect concentration.
引用
收藏
页数:15
相关论文
共 86 条
[1]   COMPUTER-SIMULATION STUDIES OF STRONTIUM-TITANATE [J].
AKHTAR, MJ ;
AKHTAR, ZUN ;
JACKSON, RA ;
CATLOW, CRA .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1995, 78 (02) :421-428
[2]   Electronic correlation and strain effects at the interfaces between polar and nonpolar complex oxides [J].
Annadi, A. ;
Putra, A. ;
Liu, Z. Q. ;
Wang, X. ;
Gopinadhan, K. ;
Huang, Z. ;
Dhar, S. ;
Venkatesan, T. ;
Ariando .
PHYSICAL REVIEW B, 2012, 86 (08)
[3]  
[Anonymous], 2000, DEFECT CHEM MET OXID
[4]   Electronic phase separation at the LaAlO3/SrTiO3 interface [J].
Ariando ;
Wang, X. ;
Baskaran, G. ;
Liu, Z. Q. ;
Huijben, J. ;
Yi, J. B. ;
Annadi, A. ;
Barman, A. Roy ;
Rusydi, A. ;
Dhar, S. ;
Feng, Y. P. ;
Ding, J. ;
Hilgenkamp, H. ;
Venkatesan, T. .
NATURE COMMUNICATIONS, 2011, 2
[5]   Pulsed laser deposition of SrTiO3/LaGaO3 and SrTiO3/LaAlO3: Plasma plume effects [J].
Aruta, C. ;
Amoruso, S. ;
Bruzzese, R. ;
Wang, X. ;
Maccariello, D. ;
Granozio, F. Miletto ;
di Uccio, U. Scotti .
APPLIED PHYSICS LETTERS, 2010, 97 (25)
[6]   High-temperature superconductivity in space-charge regions of lanthanum cuprate induced by two-dimensional doping [J].
Baiutti, F. ;
Logvenov, G. ;
Gregori, G. ;
Cristiani, G. ;
Wang, Y. ;
Sigle, W. ;
van Aken, P. A. ;
Maier, J. .
NATURE COMMUNICATIONS, 2015, 6
[7]   Dominant Mobility Modulation by the Electric Field Effect at the LaAlO3/SrTiO3 Interface [J].
Bell, C. ;
Harashima, S. ;
Kozuka, Y. ;
Kim, M. ;
Kim, B. G. ;
Hikita, Y. ;
Hwang, H. Y. .
PHYSICAL REVIEW LETTERS, 2009, 103 (22)
[8]   Anisotropic magnetotransport at the SrTiO3/LaAlO3 interface [J].
Ben Shalom, M. ;
Tai, C. W. ;
Lereah, Y. ;
Sachs, M. ;
Levy, E. ;
Rakhmilevitch, D. ;
Palevski, A. ;
Dagan, Y. .
PHYSICAL REVIEW B, 2009, 80 (14)
[9]   Direct k-Space Mapping of the Electronic Structure in an Oxide-Oxide Interface [J].
Berner, G. ;
Sing, M. ;
Fujiwara, H. ;
Yasui, A. ;
Saitoh, Y. ;
Yamasaki, A. ;
Nishitani, Y. ;
Sekiyama, A. ;
Pavlenko, N. ;
Kopp, T. ;
Richter, C. ;
Mannhart, J. ;
Suga, S. ;
Claessen, R. .
PHYSICAL REVIEW LETTERS, 2013, 110 (24)
[10]   Direct imaging of the coexistence of ferromagnetism and superconductivity at the LaAlO3/SrTiO3 interface [J].
Bert, Julie A. ;
Kalisky, Beena ;
Bell, Christopher ;
Kim, Minu ;
Hikita, Yasuyuki ;
Hwang, Harold Y. ;
Moler, Kathryn A. .
NATURE PHYSICS, 2011, 7 (10) :767-771