Quasiparticle interference of spin momentum locked surface states at step edges on Re(0001)

2020 ◽  
Vol 102 (11) ◽  
Author(s):  
J. Regel ◽  
T. Mashoff ◽  
H. J. Elmers
Keyword(s):  
Surface States ◽  
Quasiparticle Interference ◽  
Spin Momentum ◽  
Step Edges

scholarly journals Quasiparticle Interference ofC2-Symmetric Surface States in a LaOFeAs Parent Compound

2011 ◽  
Vol 106 (8) ◽  
Author(s):  
Xiaodong Zhou ◽  
Cun Ye ◽  
Peng Cai ◽  
Xiangfeng Wang ◽  
Xianhui Chen ◽  
...  
Keyword(s):  
Parent Compound ◽  
Surface States ◽  
Quasiparticle Interference ◽  
Symmetric 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 Topological insulator metamaterial with giant circular photogalvanic effect

2021 ◽  
Vol 7 (14) ◽  
pp. eabe5748
Author(s):  
X. Sun ◽  
G. Adamo ◽  
M. Eginligil ◽  
H. N. S. Krishnamoorthy ◽  
N. I. Zheludev ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Structural Design ◽  
Surface States ◽  
Optical Excitation ◽  
Fold Increase ◽  
Photogalvanic Effect ◽  
Spin Electronics ◽  
Spin Polarized ◽  
Polarized Surface ◽  
Spin Momentum

One of the most notable manifestations of electronic properties of topological insulators is the dependence of the photocurrent direction on the helicity of circularly polarized optical excitation. The helicity-dependent photocurrents, underpinned by spin-momentum locking of surface Dirac electrons, are weak and easily overshadowed by bulk contributions. Here, we show that the chiral response can be enhanced by nanostructuring. The tight confinement of electromagnetic fields in the resonant nanostructure enhances the photoexcitation of spin-polarized surface states of topological insulator Bi1.5Sb0.5Te1.8Se1.2, leading to an 11-fold increase of the circular photogalvanic effect and a previously unobserved photocurrent dichroism (ρcirc = 0.87) at room temperature. The control of spin transport in topological materials by structural design is a previously unrecognized ability of metamaterials that bridges the gap between nanophotonics and spin electronics, providing opportunities for developing polarization-sensitive photodetectors.

scholarly journals Spin Momentum-Locked Surface States in Metamaterials without Topological Transition

2018 ◽  
Vol 12 (8) ◽  
pp. 1800002 ◽  
Author(s):  
Liang Peng ◽  
Yuntian Chen ◽  
Yihao Yang ◽  
Zhiyu Wang ◽  
Faxin Yu ◽  
...  
Keyword(s):  
Surface States ◽  
Topological Transition ◽  
Spin Momentum

scholarly journals Quasiparticle interference of surface states in the type-II Weyl semimetal WTe2

2017 ◽  
Vol 96 (16) ◽  
Author(s):  
Wenhan Zhang ◽  
Quansheng Wu ◽  
Lunyong Zhang ◽  
Sang-Wook Cheong ◽  
Alexey A. Soluyanov ◽  
...  
Keyword(s):  
Surface States ◽  
Type Ii ◽  
Quasiparticle Interference ◽  
Weyl Semimetal

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 Transverse spin dynamics in structured electromagnetic guided waves

2021 ◽  
Vol 118 (6) ◽  
pp. e2018816118
Author(s):  
Peng Shi ◽  
Luping Du ◽  
Congcong Li ◽  
Anatoly V. Zayats ◽  
Xiaocong Yuan
Keyword(s):  
Electromagnetic Waves ◽  
Vector Fields ◽  
Spin Dynamics ◽  
Complex Structure ◽  
Practical Importance ◽  
Surface States ◽  
Transverse Spin ◽  
Topological Properties ◽  
Guided Modes ◽  
Spin Momentum

Spin–momentum locking, a manifestation of topological properties that governs the behavior of surface states, was studied intensively in condensed-matter physics and optics, resulting in the discovery of topological insulators and related effects and their photonic counterparts. In addition to spin, optical waves may have complex structure of vector fields associated with orbital angular momentum or nonuniform intensity variations. Here, we derive a set of spin–momentum equations which describes the relationship between the spin and orbital properties of arbitrary complex electromagnetic guided modes. The predicted photonic spin dynamics is experimentally verified with four kinds of nondiffracting surface structured waves. In contrast to the one-dimensional uniform spin of a guided plane wave, a two-dimensional chiral spin swirl is observed for structured guided modes. The proposed framework opens up opportunities for designing the spin structure and topological properties of electromagnetic waves with practical importance in spin optics, topological photonics, metrology and quantum technologies and may be used to extend the spin-dynamics concepts to fluid, acoustic, and gravitational waves.

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