Shubnikov-de Haas oscillations reaching the quantum limit in two-dimensional electron systems at SrTiO3 (111) interfaces

Ziqiao Wang; Autumn Heltman; Shalini Kumari; Lunhui Hu; Zhu Lin; Rojin Taheri; Leixin Miao; Nasim Alem; Lin Jiao; Shalinee Chikara; Alexey Suslov; John Singleton; Fedor Balakirev; Chaoxing Liu; Qi Li

Shubnikov-de Haas oscillations reaching the quantum limit in two-dimensional electron systems at SrTiO3 (111) interfaces

Transition metal oxides in the (111) orientation have been predicted to harbor topological phases and unconventional quantum states because of their hexagonal crystal symmetry and strong interactions between charge, spin, and orbital degrees of freedom. We report Shubnikov-de Haas oscillations into the quantum limit at magnetic fields up to 35 T in high-mobility (>20 000 cm2 V-1 s-1) two-dimensional electron liquids at (111)-oriented SrTiO3 interfaces with controllable carrier densities. Spin splitting is observed at low Landau levels, which is attributed to the interplay between the Zeeman splitting and Rashba spin-orbit coupling according to our theoretical modeling, yielding Landé factor g = 0.29 and Rashba coefficient α = 0.6 meV nm. At high magnetic field after the system reaches the lowest Landau level, the temperature dependence of the resistance shows a metallic to insulating state transition with the magnetoresistance changing significantly from a primarily quadratic to a large linear field dependence.

© American Physical Society (APS) [Shubnikov–de Haas oscillations reaching the quantum limit in two-dimensional electron systems at <mml:mrow><mml:mi>SrTi/mml:mi<mml:msub>O/mml:mi<mml:mn>3/mml:mn /mml:msub /mml:mrow /mml:math (111) interfaces. Physical review. B./Physical review. B 112, 3 (2025)]

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Work Title	Shubnikov-de Haas oscillations reaching the quantum limit in two-dimensional electron systems at SrTiO3 (111) interfaces
Access	Open Access
Creators	Ziqiao Wang Autumn Heltman Shalini Kumari Lunhui Hu Zhu Lin Rojin Taheri Leixin Miao Nasim Alem Lin Jiao Shalinee Chikara Alexey Suslov John Singleton Fedor Balakirev Chaoxing Liu Qi Li
Keyword	Magnetoresistance Shubnikov-de Haas effect Interfaces Transition metal oxides Two-dimensional electron system
License	In Copyright (Rights Reserved)
Work Type	Article
Publisher	Physical Review B
Publication Date	July 21, 2025
Publisher Identifier (DOI)	https://doi.org/10.1103/why6-1fl8
Deposited	July 07, 2026

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Shubnikov-de Haas oscillations reaching the quantum limit in two-dimensional electron systems at SrTiO3 (111) interfaces

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Shubnikov-de Haas oscillations reaching the quantum limit in two-dimensional electron systems at SrTiO3 (111) interfaces

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