scholarly journals Ab initio k · p theory of spin-momentum locking: Application to topological surface states

2020 ◽  
Vol 102 (11) ◽  
Author(s):  
I. A. Nechaev ◽  
E. E. Krasovskii
Keyword(s):  
Ab Initio ◽  
Surface States ◽  
Topological Surface ◽  
Spin Momentum

scholarly journals Ab initio study of topological surface states of strained HgTe

2014 ◽  
Vol 107 (5) ◽  
pp. 57006 ◽  
Author(s):  
Shu-Chun Wu ◽  
Binghai Yan ◽  
Claudia Felser
Keyword(s):  
Ab Initio ◽  
Surface States ◽  
Ab Initio Study ◽  
Topological Surface

scholarly journals Enhanced spin Seebeck effect signal due to spin-momentum locked topological surface states

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Zilong Jiang ◽  
Cui-Zu Chang ◽  
Massoud Ramezani Masir ◽  
Chi Tang ◽  
Yadong Xu ◽  
...  
Keyword(s):  
Surface States ◽  
Seebeck Effect ◽  
Spin Seebeck Effect ◽  
Topological Surface ◽  
Spin Momentum

scholarly journals Spin–momentum locking induced non-local voltage in topological insulator nanowire

Nanoscale ◽  
2020 ◽  
Vol 12 (45) ◽  
pp. 22958-22962
Author(s):  
Jen-Ru Chen ◽  
Pok Lam Tse ◽  
Ilya N. Krivorotov ◽  
Jia G. Lu
Keyword(s):  
Topological Insulator ◽  
Surface States ◽  
Voltage Signal ◽  
Topological Surface ◽  
Non Local ◽  
Unique Spin ◽  
Spin Momentum

Unique spin–momentum locking in topological surface states of Sb2Te3 nanowires exhibits an unusual symmetry in non-local voltage signal.

scholarly journals Transport theory for electrical detection of the spin-momentum locking of topological surface states

2018 ◽  
Vol 30 (33) ◽  
pp. 335404 ◽  
Author(s):  
Shi-Han Zheng ◽  
Hou-Jian Duan ◽  
Mou Yang ◽  
Liang-Bin Hu ◽  
Rui-Qiang Wang
Keyword(s):  
Transport Theory ◽  
Surface States ◽  
Electrical Detection ◽  
Topological Surface ◽  
Spin Momentum

Large Damping Enhancement in Dirac‐Semimetal–Ferromagnetic‐Metal Layered Structures Caused by Topological Surface States

2021 ◽  
pp. 2008411
Author(s):  
Jinjun Ding ◽  
Chuanpu Liu ◽  
Yuejie Zhang ◽  
Vijaysankar Kalappattil ◽  
Rui Yu ◽  
...  
Keyword(s):  
Surface States ◽  
Layered Structures ◽  
Ferromagnetic Metal ◽  
Dirac Semimetal ◽  
Topological Surface

scholarly journals Discovery of a weak topological insulating state and van Hove singularity in triclinic RhBi2

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Kyungchan Lee ◽  
Gunnar F. Lange ◽  
Lin-Lin Wang ◽  
Brinda Kuthanazhi ◽  
Thaís V. Trevisan ◽  
...  
Keyword(s):  
Time Reversal ◽  
Topological Insulators ◽  
Dirac Point ◽  
Saddle Points ◽  
Surface States ◽  
Van Hove Singularity ◽  
Space Group ◽  
Topological Materials ◽  
Topological Surface ◽  
Optimal Space

AbstractTime reversal symmetric (TRS) invariant topological insulators (TIs) fullfil a paradigmatic role in the field of topological materials, standing at the origin of its development. Apart from TRS protected strong TIs, it was realized early on that more confounding weak topological insulators (WTI) exist. WTIs depend on translational symmetry and exhibit topological surface states only in certain directions making it significantly more difficult to match the experimental success of strong TIs. We here report on the discovery of a WTI state in RhBi2 that belongs to the optimal space group P$$\bar{1}$$ 1 ¯ , which is the only space group where symmetry indicated eigenvalues enumerate all possible invariants due to absence of additional constraining crystalline symmetries. Our ARPES, DFT calculations, and effective model reveal topological surface states with saddle points that are located in the vicinity of a Dirac point resulting in a van Hove singularity (VHS) along the (100) direction close to the Fermi energy (EF). Due to the combination of exotic features, this material offers great potential as a material platform for novel quantum effects.

Fermi level tuning and the robustness of topological surface states against impurity doping in Sn doped Sb2Te2Se

2021 ◽  
Vol 118 (15) ◽  
pp. 154001
Author(s):  
Debarghya Mallick ◽  
Shoubhik Mandal ◽  
R. Ganesan ◽  
P. S. Anil Kumar
Keyword(s):  
Fermi Level ◽  
Surface States ◽  
Impurity Doping ◽  
Topological Surface

scholarly journals 2D weak anti-localization in thin films of the topological semimetal Pd$$_{3}$$Bi$$_{2}$$S$$_{2}$$

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shama ◽  
R. K. Gopal ◽  
Goutam Sheet ◽  
Yogesh Singh
Keyword(s):  
Thin Films ◽  
Phonon Scattering ◽  
Surface States ◽  
Relaxation Mechanism ◽  
Transport Studies ◽  
Bulk Carriers ◽  
Topological Semimetal ◽  
Topological Surface ◽  
First Time ◽  
Electron Phonon Scattering

AbstractPd$$_{3}$$ 3 Bi$$_{2}$$ 2 S$$_{2}$$ 2 (PBS) is a recently proposed topological semimetal candidate. However, evidence for topological surface states have not yet been revealed in transport measurements due to the large mobility of bulk carriers. We report the growth and magneto-transport studies of PBS thin films where the mobility of the bulk carriers is reduced by two orders of magnitude, revealing for the first time, contributions from the 2-dimensional (2D) topological surface states in the observation of the 2D weak anti-localization (WAL) effect in magnetic field and angle dependent conductivity measurements. The magnetotransport data is analysed within the 2D Hikami-Larkin-Nagaoka (HLN) theory. The analysis suggests that multiple conduction channels contribute to the transport. It is also found that the temperature dependence of the dephasing length can’t be explained only by electron-electron scattering and that electron-phonon scattering also contributes to the phase relaxation mechanism in PBS films.

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