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Superconductivity dichotomy in K-coated single and double unit cell FeSe films on SrTiO3
Chenjia Tang, Ding Zhang, Yunyi Zang +12
We report the superconductivity evolution of one unit cell (1-UC) and 2-UC FeSe films on SrTiO3(001) substrates with potassium (K) adsorption. By in situ scanning tunneling spectro…
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…
Disentangling the magnetoelectric and thermoelectric transport in topological insulator thin films
Jinsong Zhang, Xiao Feng, Yong Xu +14
We report transport studies on (Bi,Sb)2Te3 topological insulator thin films with tunable electronic band structure. We find a doping and temperature regime in which the Hall coeffi…
Simultaneous electrical-field-effect modulation of both top and bottom Dirac surface states of epitaxial thin films of three-dimensional topological insulators
Cui-Zu Chang, Zuocheng Zhang, Kang Li +11
It is crucial for the studies of the transport properties and quantum effects related to Dirac surface states of three-dimensional topological insulators (3D TIs) to be able to sim…
Visualizing the elongated vortices in -Ga nanostrips
Hui-Min Zhang, Zi-Xiang Li, Jun-Ping Peng +10
We study the magnetic response of superconducting -Ga via low temperature scanning tunneling microscopy and spectroscopy. The magnetic vortex cores rely substantially on the Ga…