DOE OSTI · 2997113
Shubnikov–de Haas oscillations reaching the quantum limit in two-dimensional electron systems at SrTiO 3 (111) interfaces
Abstract
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 cm 2 V −1 s −1 ) two-dimensional electron liquids at (111)-oriented SrTiO 3 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. Furthermore, 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.
Explore related subjects
Keep this discovery
Explore connections, maps & timelines
Wang, Ziqiao [The Pennsylvania State University, University Park, PA (United States)] (ORCID:0000000213018731), Heltman, Autumn [The Pennsylvania State University, University Park, PA (United States)] (ORCID:0000000299014378), Kumari, Shalini [The Pennsylvania State University, University Park, PA (United States)], Hu, Lunhui [The Pennsylvania State University, University Park, PA (United States)] (ORCID:0000000203763367), Lin, Zhu [The Pennsylvania State University, University Park, PA (United States)], Taheri, Rojin [The Pennsylvania State University, University Park, PA (United States)], Miao, Leixin [The Pennsylvania State University, University Park, PA (United States)], Alem, Nasim [The Pennsylvania State University, University Park, PA (United States)], Jiao, Lin [National High Magnetic Field Laboratory, Tallahassee, FL (United States)] (ORCID:0000000283430190), Chikara, Shalinee [National High Magnetic Field Laboratory, Tallahassee, FL (United States)] (ORCID:0000000288194465), Suslov, Alexey [National High Magnetic Field Laboratory, Tallahassee, FL (United States)] (ORCID:000000022224153X), Singleton, John [National High Magnetic Field Laboratory, Tallahassee, FL (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000161096905), Balakirev, Fedor [National High Magnetic Field Laboratory, Tallahassee, FL (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000348875140), Liu, Chaoxing [The Pennsylvania State University, University Park, PA (United States)], Li, Qi [The Pennsylvania State University, University Park, PA (United States)] (ORCID:0000000346232635). 2025-07-21. Shubnikov–de Haas oscillations reaching the quantum limit in two-dimensional electron systems at SrTiO 3 (111) interfaces. https://doi.org/10.1103/why6-1fl8
Cite the original work for its findings. Save a collection to share your selection of sources.