Publications (18)
Visualizing the breakdown of the quantum anomalous Hall effect
George M. Ferguson, Run Xiao, Anthony R. Richardella +3
The creation of topologically non-trivial matter across electronic, mechanical, cold-atom, and photonic platforms is advancing rapidly, yet understanding the breakdown of topologic…
Mapping the phase diagram of the quantum anomalous Hall and topological Hall effects in a dual-gated magnetic topological insulator heterostructure
Run Xiao, Di Xiao, Jue Jiang +11
We use magnetotransport in dual-gated magnetic topological insulator heterostructures to map out a phase diagram of the topological Hall and quantum anomalous Hall effects as a fun…
Crossover of Ising- to Rashba-Type Superconductivity in Epitaxial Bi2Se3/Monolayer NbSe2 Heterostructures
Hemian Yi, Lun-Hui Hu, Yuanxi Wang +15
A topological insulator (TI) interfaced with an s-wave superconductor has been predicted to host an unusual form of superconductivity known as topological superconductivity (TSC).…
Capping layer influence and isotropic in-plane upper critical field of the superconductivity at the FeSe/SrTiO3 interface
Yanan Li, Ziqiao Wang, Run Xiao +5
Understanding the superconductivity at the interface of FeSe/SrTiO3 is a problem of great contemporary interest due to the significant increase in critical temperature (Tc) compare…
Influence of magnetic and electric fields on universal conductance fluctuations in thin films of the Dirac semi-metal Cd3As2
Run Xiao, Saurav Islam, Wilson Yanez +6
Time-reversal invariance and inversion symmetry are responsible for the topological band structure in Dirac semimetals. These symmetries can be broken by applying an external magne…
Tuning Chern Number in Quantum Anomalous Hall Insulators
Yi-Fan Zhao, Ruoxi Zhang, Ruobing Mei +10
The quantum anomalous Hall (QAH) state is a two-dimensional topological insulating state that has quantized Hall resistance of h/Ce2 and vanishing longitudinal resistance under zer…
Challenges to magnetic doping of thin films of the Dirac semimetal CdAs
Run Xiao, Jacob T Held, Jeffrey Rable +4
Magnetic doping of topological quantum materials provides an attractive route for studying the effects of time-reversal symmetry breaking. Thus motivated, we explore the introducti…
Giant spin torque efficiency in naturally oxidized polycrystalline TaAs thin films
Wilson Yanez, Yongxi Ou, Run Xiao +6
We report the measurement of efficient charge-to-spin conversion at room temperature in Weyl semimetal/ferromagnet heterostructures with both oxidized and pristine interfaces. Poly…
ZrTe2/CrTe2: an epitaxial van der Waals platform for spintronics
Yongxi Ou, Wilson Yanez, Run Xiao +12
The rapid discovery of two-dimensional (2D) van der Waals (vdW) quantum materials has led to heterostructures that integrate diverse quantum functionalities such as topological pha…
Interface-Induced Superconductivity in Magnetic Topological Insulator-Iron Chalcogenide Heterostructures
Hemian Yi, Yi-Fan Zhao, Ying-Ting Chan +24
When two different electronic materials are brought together, the resultant interface often shows unexpected quantum phenomena, including interfacial superconductivity and Fu-Kane…
Andreev processes in mesoscopic multi-terminal graphene Josephson junctions
Fan Zhang, Asmaul Smitha Rashid, Mostafa Tanhayi Ahari +7
There is growing interest in using multi-terminal Josephson junctions (MTJJs) as a platform to artificially emulate topological phases and to investigate complex superconducting me…
Imaging signatures of edge currents in a magnetic topological insulator
G. M. Ferguson, Run Xiao, Anthony R. Richardella +3
Magnetic topological insulators (MTIs) host topologically protected edge states, but the role that these edge states play in electronic transport remains unclear. Using scanning su…
Direct visualization of electronic transport in a quantum anomalous Hall insulator
G. M. Ferguson, Run Xiao, Anthony R. Richardella +3
A quantum anomalous Hall (QAH) insulator is characterized by quantized Hall and vanishing longitudinal resistances at zero magnetic field that are protected against local perturbat…
Concurrence of Quantum Anomalous Hall and Topological Hall Effects in Magnetic Topological Insulator Sandwich Heterostructures
Jue Jiang, Di Xiao, Fei Wang +13
The quantum anomalous Hall (QAH) effect is a quintessential consequence of non-zero Berry curvature in momentum-space. The QAH insulator harbors dissipation-free chiral edge states…
Integer quantum Hall effect and enhanced g-factor in quantum confined Cd3As2 films
Run Xiao, Junyi Zhang, Juan Chamorro +6
We investigate the integer quantum Hall effect in Cd3As2 thin films under conditions of strong to moderate quantum confinement (thicknesses of 10 nm, 12 nm, 15 nm). In all the film…
Spin and charge interconversion in Dirac semimetal thin films
Wilson Yanez, Yongxi Ou, Run Xiao +17
We report spin-to-charge and charge-to-spin conversion at room temperature in heterostructure devices that interface an archetypal Dirac semimetal, Cd3As2, with a metallic ferromag…
Anomalous electronic energy relaxation and soft phonons in the Dirac semimetal CdAs
Rishi Bhandia, David Barbalas, Run Xiao +5
We have used a combination of linear response time-domain THz spectroscopy (TDTS) and high-field non-linear THz spectroscopy to separately probe the electronic momentum and energy…
Constraints on proximity-induced ferromagnetism in a Dirac semimetal (CdAs)/ferromagnetic semiconductor (GaMnSb) heterostructure
Arpita Mitra, Run Xiao, Wilson Yanez +8
Breaking time-reversal symmetry in a Dirac semimetal CdAs through doping with magnetic ions or by the magnetic proximity effect is expected to cause a transition to other t…