Controlling Kondo-like Scattering at the SrTiO3-based Interfaces

被引：37

作者：

Han, K. ^{[1
,2
]}

Palina, N. ^{[1
,3
]}

Zeng, S. W. ^{[1
,2
]}

Huang, Z. ^{[1
]}

Li, C. J. ^{[1
]}

Zhou, W. X. ^{[1
,2
]}

Wan, D. -Y. ^{[1
,2
]}

Zhang, L. C. ^{[1
,2
]}

Chi, X. ^{[3
]}

Guo, R. ^{[1
,4
]}

Chen, J. S. ^{[4
]}

Venkatesan, T. ^{[1
,2
,4
,5
,6
]}

Rusydi, A. ^{[1
,2
,3
]}

Ariando ^{[1
,2
,6
]}

机构：

[1] Natl Univ Singapore, NUSNNI NanoCore, Singapore 117411, Singapore

[2] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

[3] Natl Univ Singapore, Singapore Synchrotron Light Source, Singapore 117603, Singapore

[4] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117575, Singapore

[5] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore

[6] Natl Univ Singapore, Grad Sch Integrat Sci & Engn NGS, 28 Med Dr, Singapore 117456, Singapore

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

基金：

新加坡国家研究基金会;

关键词：

ELECTRON-GAS; LAALO3/SRTIO3; FERROMAGNETISM; SUPERCONDUCTIVITY; COEXISTENCE; MAGNETISM;

D O I：

10.1038/srep25455

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The observation of magnetic interaction at the interface between nonmagnetic oxides has attracted much attention in recent years. In this report, we show that the Kondo-like scattering at the SrTiO3-based conducting interface is enhanced by increasing the lattice mismatch and growth oxygen pressure P-O2. For the 26-unit-cell LaAlO3/SrTiO3 (LAO/STO) interface with lattice mismatch being 3.0%, the Kondo-like scattering is observed when P-O2 is beyond 1 mTorr. By contrast, when the lattice mismatch is reduced to 1.0% at the (La0.3Sr0.7)(Al0.65Ta0.35) O-3/SrTiO3 (LSAT/STO) interface, the metallic state is always preserved up to P-O2 of 100 mTorr. The data from Hall measurement and X-ray absorption near edge structure (XANES) spectroscopy reveal that the larger amount of localized Ti3+ ions are formed at the LAO/STO interface compared to LSAT/STO. Those localized Ti3+ ions with unpaired electrons can be spin-polarized to scatter mobile electrons, responsible for the Kondo-like scattering observed at the LAO/STO interface.

引用

页数：8

共 47 条

[1] Fourfold oscillation in anisotropic magnetoresistance and planar Hall effect at the LaAlO3/SrTiO3 heterointerfaces: Effect of carrier confinement and electric field on magnetic interactions [J].

Annadi, A. ;

Huang, Z. ;

Gopinadhan, K. ;

Wang, X. Renshaw ;

Srivastava, A. ;

Liu, Z. Q. ;

Ma, H. Harsan ;

Sarkar, T. P. ;

Venkatesan, T. ;

Ariando .

PHYSICAL REVIEW B, 2013, 87 (20)

[2] 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

[3] Ferromagnetic exchange, spin-orbit coupling and spiral magnetism at the LaAlO3/SrTiO3 interface [J].

Banerjee, Sumilan ;

Erten, Onur ;

Randeria, Mohit .

NATURE PHYSICS, 2013, 9 (10) :625-629

[4] Tailoring a two-dimensional electron gas at the LaAlO3/SrTiO3 (001) interface by epitaxial strain [J].

Bark, C. W. ;

Felker, D. A. ;

Wang, Y. ;

Zhang, Y. ;

Jang, H. W. ;

Folkman, C. M. ;

Park, J. W. ;

Baek, S. H. ;

Zhou, H. ;

Fong, D. D. ;

Pan, X. Q. ;

Tsymbal, E. Y. ;

Rzchowski, M. S. ;

Eom, C. B. .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2011, 108 (12) :4720-4724

[5] Mapping the spatial distribution of charge carriers in LaAlO3/SrTiO3 heterostructures [J].

Basletic, M. ;

Maurice, J. -L. ;

Carretero, C. ;

Herranz, G. ;

Copie, O. ;

Bibes, M. ;

Jacquet, E. ;

Bouzehouane, K. ;

Fusil, S. ;

Barthelemy, A. .

NATURE MATERIALS, 2008, 7 (08) :621-625

[6] Interface exchange processes in LaAlO3/SrTiO3 induced by oxygen vacancies [J].

Behrmann, Malte ;

Lechermann, Frank .

PHYSICAL REVIEW B, 2015, 92 (12)

[7] Thickness dependence of the mobility at the LaAlO3/SrTiO3 interface [J].

Bell, C. ;

Harashima, S. ;

Hikita, Y. ;

Hwang, H. Y. .

APPLIED PHYSICS LETTERS, 2009, 94 (22)

[8] Band Gap and Edge Engineering via Ferroic Distortion and Anisotropic Strain: The Case of SrTiO3 [J].

Berger, Robert F. ;

Fennie, Craig J. ;

Neaton, Jeffrey B. .

PHYSICAL REVIEW LETTERS, 2011, 107 (14)

[9] WEAK ANTI-LOCALIZATION - AN EXPERIMENTAL PROOF FOR THE DESTRUCTIVE INTERFERENCE OF ROTATED SPIN 1/2 [J].

BERGMANN, G .

SOLID STATE COMMUNICATIONS, 1982, 42 (11) :815-817

[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

← 1 2 3 4 5 →