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Growth dynamics and thickness-dependent electronic structure of topological insulator Bi2Te3 thin films on Si
Yao-Yi Li, Guang Wang, Xie-Gang Zhu +16
We use real-time reflection high energy electron diffraction intensity oscillation to establish the Te-rich growth dynamics of topological insulator thin films of Bi2Te3 on Si(111)…
Crossover of Three-Dimensional Topological Insulator of Bi2Se3 to the Two-Dimensional Limit
Yi Zhang, Ke He, Cui-Zu Chang +13
Bi2Se3 is theoretically predicted1 2and experimentally observed2,3 to be a three dimensional topological insulator. For possible applications, it is important to understand the ele…
Equivalent topological invariants of topological insulators
Zhong Wang, Xiao-Liang Qi, Shou-Cheng Zhang
A time-reversal invariant topological insulator can be generally defined by the effective topological field theory with a quantized θcoefficient, which can only take values of 0 or…
Quasiparticle Interference on the Surface of the Topological Insulator BiTe
Wei-Cheng Lee, Congjun Wu, Daniel P. Arovas +1
The quasiparticle interference of the spectroscopic imaging scanning tunneling microscopy has been investigated for the surface states of the large gap topological insulator Bi…
Oscillatory crossover from two dimensional to three dimensional topological insulators
Chao-Xing Liu, HaiJun Zhang, Binghai Yan +5
We investigate the crossover regime from three dimensional topological insulators and to two dimensional topological insulators with quantum spin Hall effect…
Collective modes of a helical liquid
S. Raghu, Suk Bum Chung, Xiao-Liang Qi +1
We study low energy collective modes and transport properties of the "helical metal" on the surface of a topological insulator. At low energies, electrical transport and spin dynam…
Fermi Surface Topological Invariants for Time Reversal Invariant Superconductors
Xiao-Liang Qi, Taylor L. Hughes, Shou-Cheng Zhang
A time reversal invariant (TRI) topological superconductor has a full pairing gap in the bulk and topologically protected gapless states on the surface or at the edge. In this pape…
Aharonov-Bohm interference in topological insulator nanoribbons
Hailin Peng, Keji Lai, Desheng Kong +6
Topological insulators represent novel phases of quantum matter with an insulating bulk gap and gapless edges or surface states. The two-dimensional topological insulator phase was…
Dynamical Axion Field in Topological Magnetic Insulators
Rundong Li, Jing Wang, Xiaoliang Qi +1
Axions are very light, very weakly interacting particles postulated more than 30 years ago in the context of the Standard Model of particle physics. Their existence could explain t…
Magnetoconductance of the quantum spin Hall state
Joseph Maciejko, Xiao-Liang Qi, Shou-Cheng Zhang
We study numerically the edge magnetoconductance of a quantum spin Hall insulator in the presence of quenched nonmagnetic disorder. For a finite magnetic field B and disorder stren…
Detecting the Majorana fermion surface state of He-B through spin relaxation
Suk Bum Chung, Shou-Cheng Zhang
The concept of the Majorana fermion has been postulated more than eighty years ago; however, this elusive particle has never been observed in nature. The non-local character of the…
Nonlocal edge state transport in the quantum spin Hall state
Andreas Roth, Christoph Bruene, Hartmut Buhmann +4
We present direct experimental evidence for nonlocal transport in HgTe quantum wells in the quantum spin Hall regime, in the absence of any external magnetic field. The data conclu…
Emergence of the persistent spin helix in semiconductor quantum wells
Jake D. Koralek, Chris Weber, Joe Orenstein +4
According to Noethers theorem, for every symmetry in nature there is a corresponding conservation law. For example, invariance with respect to spatial translation corresponds to co…
Electronic Structures and Surface States of Topological Insulator BiSb
Hai-Jun Zhang, Chao-Xing Liu, Xiao-Liang Qi +4
We investigate the electronic structures of the alloyed BiSb compounds based on first-principle calculations including spin-orbit coupling (SOC), and calculate the surf…
Kondo effect in the helical edge liquid of the quantum spin Hall state
Joseph Maciejko, Chaoxing Liu, Yuval Oreg +3
Following the recent observation of the quantum spin Hall (QSH) effect in HgTe quantum wells, an important issue is to understand the effect of impurities on transport in the QSH r…
Supersymmetric Valence Bond Solid States
Daniel P. Arovas, Kazuki Hasebe, Xiao-Liang Qi +1
In this work we investigate the supersymmetric version of the valence bond solid (SVBS) state. In one dimension, the SVBS states continuously interpolate between the valence bond s…