Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevB.98.085416
Title: Strong spin-orbit coupling and magnetism in (111) (La0.3Sr0.7)(Al0.65Ta0.35)O-3/SrTiO3
Authors: Bal, V. V.
Huang, Z. 
Han, K. 
Ariando 
Venkatesan, T. 
Chandrasekhar, V
Issue Date: 7-Aug-2018
Publisher: American Physical Society
Citation: Bal, V. V., Huang, Z., Han, K., Ariando, Venkatesan, T., Chandrasekhar, V (2018-08-07). Strong spin-orbit coupling and magnetism in (111) (La0.3Sr0.7)(Al0.65Ta0.35)O-3/SrTiO3. PHYSICAL REVIEW B 98 (8). ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevB.98.085416
Abstract: Two-dimensional conducting interfaces in SrTiO3-based heterostructures display a variety of coexisting and competing physical phenomena, which can be tuned by the application of a gate voltage. (111) oriented heterostructures have recently gained attention due to the possibility of finding exotic physics in these systems due to their hexagonal surface crystal symmetry. In this work, we use magnetoresistance to study the evolution of spin-orbit interaction and magnetism in (111) oriented (La0.3Sr0.7)(Al0.65Ta0.35)O3/SrTiO3. At more positive values of the gate voltage, which correspond to high carrier densities, we find that transport is multiband, and dominated by high-mobility carriers with a tendency toward weak localization. At more negative gate voltages, the carrier density is reduced, the high-mobility bands are depopulated, and weak antilocalization effects begin to dominate, indicating that spin-orbit interaction becomes stronger. At millikelvin temperatures, at gate voltages corresponding to the strong spin-orbit regime, we observe hysteresis in magnetoresistance, indicative of ferromagnetism in the system. Our results suggest that in the (111) (La0.3Sr0.7)(Al0.65Ta0.35)O3/SrTiO3 system, low-mobility carriers that experience strong spin-orbit interactions participate in creating magnetic order in the system. © 2018 American Physical Society.
Source Title: PHYSICAL REVIEW B
URI: https://scholarbank.nus.edu.sg/handle/10635/168593
ISSN: 24699950
DOI: 10.1103/PhysRevB.98.085416
Appears in Collections:Staff Publications
Elements

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
Strong spin orbit coupling and magnetism in (111) (La0.3Sr0.7)(Al0.65Ta0.35)O3SrTiO3.pdf1.23 MBAdobe PDF

OPEN

NoneView/Download

SCOPUSTM   
Citations

2
checked on Aug 7, 2020

Page view(s)

17
checked on Aug 6, 2020

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.