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Direct visualization of electric current induced dipoles of atomic impurities
Yaowu Liu, Zichun Zhang, Sidan Chen +10
Learning the electron scattering around atomic impurities is a fundamental step to fully understand the basic electronic transport properties of realistic conducting materials. Alt…
Visualizing the in-gap states in domain boundaries of ultra-thin topological insulator films
Jun Zhang, Junbo Cheng, Shuaihua Ji +1
Ultra-thin topological insulators provide a platform of realizing many exotic phenomena such a Quantum spin Hall effect, Quantum anomalous Hall effect, etc. These effects or states…
From atomic layer to the bulk: low-temperature atomistic structure, ferroelectric and electronic properties of SnTe films
Thaneshwor P. Kaloni, Kai Chang, Brandon J. Miller +5
SnTe hosts ferroelectricity that competes with its weak non-trivial band topology: in the high-symmetry rocksalt structure--in which its intrinsic electric dipole is quenched--this…
Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
Cui-Zu Chang, Jinsong Zhang, Xiao Feng +20
The quantized version of the anomalous Hall effect has been predicted to occur in magnetic topological insulators, but the experimental realization has been challenging. Here, we r…
Probing Dirac Fermion Dynamics in Topological Insulator BiSe Films with Scanning Tunneling Microscope
Can-Li Song, Lili Wang, Ke He +4
Scanning tunneling microscopy and spectroscopy have been used to investigate the femtosecond dynamics of Dirac fermions in the topological insulator BiSe ultrathin films. A…
Unusual giant magnetoresistance effect in heterojunction structure of ultra-thin single-crystal Pb film on silicon substrate
Jian Wang, Xu-Cun Ma, Yun Qi +7
Superconductor films on semiconductor substrates draw much attention recently since the derived superconductor-based electronics have been shown promising for future data process a…