Crynodeb
The high index (441) surface of bismuth has been studied using scanning tunneling microscopy (STM), angle resolved photoemission spectroscopy (APRES), and spinresolved ARPES. The surface is strongly corrugated, exposing a regular array of (110)like terraces. Two surface localized states are observed, both of which are linearly dispersing in one inplane direction (kx), and dispersionless in the orthogonal inplane direction (ky), and both of which have a Diraclike crossing at kx=0. Spin ARPES reveals a strong inplane polarization, consistent with Rashbalike spinorbit coupling. One state has a strong outofplane spin component, which matches with the miscut angle, suggesting its possible origin as an edge state. The electronic structure of Bi(441) has significant similarities with topological insulator surface states and is expected to support onedimensional quantum spin Halllike coupled spincharge transport properties with inhibited backscattering, without requiring a topological insulator bulk.
Iaith wreiddiol  Saesneg 

Rhif yr erthygl  165307 
Cyfnodolyn  Physical Review B 
Cyfrol  91 
Rhif cyhoeddi  16 
Dynodwyr Gwrthrych Digidol (DOIs)  
Statws  Cyhoeddwyd  21 Ebr 2015 
Ôl bys
Gweld gwybodaeth am bynciau ymchwil 'Onedimensional spin texture of Bi(441): Quantum spin Hall properties without a topological insulator'. Gyda’i gilydd, maen nhw’n ffurfio ôl bys unigryw.Proffiliau

Andrew Evans
 Cyfadran Busnes a’r Gwyddorau Ffisegol, Ffiseg  Professor, Head of Department (Physics)
Unigolyn: Dysgu ac Ymchwil, Arall