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Observation of unconventional band topology in a superconducting doped topological insulator, Cux-Bi2Se3: Topological Superconductor or non-Abelian superconductor?
L. Wray, S. Xu, J. Xiong +7
The Cu-doped topological insulator BiSe has recently been found to undergo a superconducting transition upon cooling, raising the possibilities that it is the first known "…
A topological Dirac insulator in a quantum spin Hall phase (experimental realization of a 3D Topological Insulator)
D. Hsieh, D. Qian, L. Wray +4
When electrons are subject to a large external magnetic field, the conventional charge quantum Hall effect \cite{Klitzing,Tsui} dictates that an electronic excitation gap is genera…
Observation of topologically protected Dirac spin-textures and πBerry's phase in pure Antimony (Sb) and topological insulator BiSb
D. Hsieh, Y. Xia, L. Wray +10
A topologically ordered material is characterized by a rare quantum organization of electrons that evades the conventional spontaneously broken symmetry based classification of con…
Time-reversal-protected single-Dirac-cone topological-insulator states in Bi2Te3 and Sb2Te3: Topologically Spin-polarized Dirac fermions with pi Berry's Phase
D. Hsieh, Y. Xia, D. Qian +12
We show that the strongly spin-orbit coupled materials Bi2Te3 and Sb2Te3 (first non-Bi topological insulator) and their derivatives belong to the Z2 (Time-Reversal-Protected, elast…
Superconductivity in CuxBi2Se3 and its implications for pairing in the undoped topological insulator
Y. S. Hor, A. J. Williams, J. G. Checkelsky +7
Bi2Se3 is one of a handful of known topological insulators. Here we show that copper intercalation in the van der Waals gaps between the Bi2Se3 layers, yielding an electron concent…
Quantum interference in macroscopic crystals of non-metallic BiSe
J. G. Checkelsky, Y. S. Hor, M. -H. Liu +3
Photoemission experiments have shown that BiSe is a topological insulator. By controlled doping, we have obtained crystals of BiSe with non-metallic conduction. At…