MRS Meetings and Events


QT06.07.05 2024 MRS Spring Meeting

Unusual Quantum Oscillations and Indications of Non-Trivial Electronic States in a Quassi Two-Dimentional Electron System at Intricate Oxide Interfaces

When and Where

Apr 24, 2024
4:45pm - 5:00pm

Room 447, Level 4, Summit



Manish Dumen1,Km Rubi2

INST Mohali1,Los Alamos National Laboratory2


Manish Dumen1,Km Rubi2

INST Mohali1,Los Alamos National Laboratory2
Two-dimensional electron systems (2DES) built from perovskite transition metal oxides are potential prospects for the next generation of spintronics and quantum computing due to the simultaneous occurrence of electric-field driven superconductivity and spin-orbit interaction. To enhance technological applications, it is necessary to fully comprehend the electronic bands and confirm the anticipated electronic states in these 2DES by experimentation. Here, using thorough studies of Shubnikov-de Haas oscillations in two distinct systems, EuO/KTaO<sub>3</sub> (EuO/KTO) and LaAlO<sub>3</sub>/SrTiO<sub>3</sub> (LAO/STO), we give new insights into the electronic states of the 2DES at oxide interfaces. We performed transport tests in high magnetic fields up to 60 T and low temperatures down to 100 mK in order to precisely resolve these oscillations. We saw a progressive increase in oscillations for 2D confined electrons at both contacts. We saw a progressive increase in oscillation frequency and cyclotron mass with the magnetic field for 2D confined electrons at both interfaces. We analyze these fascinating results by taking into account the possibility of non-trivial electronic bands, for which both linear and parabolic dispersion relations are included in the E−k dispersion. The unconventional oscillations presented in this study not only establish a new paradigm for quantum oscillations in 2DES based on perovskite transition metal oxides, where the oscillations frequency exhibits quadratic dependence on the magnetic field, but also provide experimental evidence for topological-like electronic states in KTO-2DES and STO-2DES.


molecular beam epitaxy (MBE) | RHEED

Symposium Organizers

Lucas Caretta, Brown University
Yu-Tsun Shao, University of Southern California
Sandhya Susarla, Arizona State University
Y. Eren Suyolcu, Max Planck Institute

Publishing Alliance

MRS publishes with Springer Nature