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Spectroscopic Signatures of Nonlocal Interfacial Coupling in Superconducting FeSe/SrTiO3 Heterostructures
Nina Andrejevic, Fei Han, Thanh Nguyen +10
The mechanism of enhanced superconductivity in the one unit-cell (1UC) FeSe film on a SrTiO3 (STO) substrate has stimulated significant research interest but remains elusive. Using…
Unconventional Planar Hall Effect in Exchange-Coupled Topological Insulator-Ferromagnetic Insulator Heterostructures
David Rakhmilevich, Fei Wang, Weiwei Zhao +4
The Dirac electrons occupying the surface states (SSs) of topological insulators (TIs) have been predicted to exhibit many exciting magneto-transport phenomena. Here we report on t…
Engineering the breaking of time-reversal symmetry in gate-tunable hybrid ferromagnet/topological insulator heterostructures
Joon Sue Lee, Anthony Richardella, Robert D. Fraleigh +3
Studying the influence of breaking time-reversal symmetry on topological insulator surface states is an important problem of current interest in condensed matter physics and could…
Dirac-Electrons-Mediated Magnetic Proximity Effect in Topological Insulator / Magnetic Insulator Heterostructures
Mingda Li, Qichen Song, Weiwei Zhao +8
The possible realization of dissipationless chiral edge current in a topological insulator / magnetic insulator heterostructure is based on the condition that the magnetic proximit…
Observation of the quantum-anomalous-Hall insulator to Anderson insulator quantum phase transition and its scaling behavior
Cui-Zu Chang, Weiwei Zhao, Jian Li +4
Fundamental insight into the nature of the quantum phase transition from a superconductor to an insulator in two dimensions, or from one plateau to the next or to an insulator in q…
Zero-field dissipationless chiral edge transport and the nature of dissipation in the quantum anomalous Hall state
Cui-Zu Chang, Weiwei Zhao, Duk Y. Kim +5
The quantum anomalous Hall (QAH) effect is predicted to possess, at zero magnetic field, chiral edge channels that conduct spin polarized current without dissipation. While edge ch…
Experimental Verification of Van Vleck Nature of Long-Range Ferromagnetic Order in Vanadium-Doped Three-Dimensional Topological Insulator SbTe
Mingda Li, Cui-Zu Chang, Lijun Wu +6
We demonstrate by high resolution low temperature electron energy loss spectroscopy (EELS) measurements that the long range ferromagnetic (FM) order in vanadium (V)-doped topologic…