Spin-orbit interaction effect in the electronic structure of Bi 2 Te 3 observed by angle-resolved photoemission spectroscopy

H.‐J. Noh; H. Koh; S.-J. Oh; J.-H. Park; H.-D. Kim; J. D. Rameau; T. Valla; T. E. Kidd; P. D. Johnson; Yong Hu; Qian Li

doi:10.1209/0295-5075/81/57006

Abstract

The electronic structure of p-type doped Bi2Te3 is studied by angle-resolved photoemission spectroscopy (ARPES) to experimentally confirm the mechanism responsible for the high thermoelectric figure of merit. Our ARPES study shows that the band edges are located off. the Gamma-Z line in the Brillouin zone, which provides direct observation that the spin-orbit interaction is a key factor to understand the electronic structure and the corresponding thermoelectric properties of Bi2Te3. A successive time-dependent ARPES measurement also reveals that the electron-like bands crossing E-F near the (Gamma) under bar -point are formed in an hour after cleaving the crystals. We interpret these as surface states induced by surface band bending, possibly due to quintuple inter-layer distance change of Bi2Te3. Copyright (c) EPLA, 2008.

Keywords

Angle-resolved photoemission spectroscopyBrillouin zonePhotoemission spectroscopyCondensed matter physicsElectronic structureElectronic band structureBand bendingX-ray photoelectron spectroscopySpin–orbit interactionMaterials scienceSpin (aerodynamics)Thermoelectric effectSpectroscopyPhysicsNuclear magnetic resonanceQuantum mechanics

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Publication Info

Year: 2008
Type: article
Volume: 81
Issue: 5
Pages: 57006-57006
Citations: 108
Access: Closed

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APA Style

                            
                                
                                    H.‐J. Noh, 
                                
                                    H. Koh, 
                                
                                    S.-J. Oh
                                
                                et al.
                            
                            (2008). 
                            Spin-orbit interaction effect in the electronic structure of Bi <sub>2</sub> Te <sub>3</sub> observed by angle-resolved photoemission spectroscopy. 
                            Europhysics Letters (EPL)
                            , 81
                            (5)
                            , 57006-57006.
                            https://doi.org/10.1209/0295-5075/81/57006
                        

Identifiers

DOI: 10.1209/0295-5075/81/57006
arXiv: 0803.0052

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Data completeness: 84%