6533b82efe1ef96bd1294576
RESEARCH PRODUCT
Quasiparticle interference of spin momentum locked surface states at step edges on Re(0001)
J. RegelT. MashoffHans-joachim Elmerssubject
PhysicsCondensed matter physicsPhotoemission spectroscopyScatteringAttenuationScanning tunneling spectroscopyFermi level02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencessymbols.namesake0103 physical sciencesQuasiparticlesymbols010306 general physics0210 nano-technologyDispersion (water waves)Surface statesdescription
Quasiparticle interference patterns formed by a surface state on the Re(0001) surface were investigated using scanning tunneling spectroscopy. The energy dispersion is inferred from Fourier-transformed differential conductivity maps for occupied and unoccupied states. The band dispersion for occupied states agrees with earlier published results obtained by angle-resolved photoemission spectroscopy. An analysis of the phase of interference patterns at step edges reveals a drastic change in the effective energy barrier for backscattering above and below the Fermi level. The attenuation of the interference pattern with increasing distance indicates interband scattering is the dominant scattering mechanism. Step decoration by Ni has a negligible influence on the pattern, excluding spin-flip scattering as a dominant contribution. The one-dimensional Re/Au line interface, however, reverses the scattering barrier behavior, indicating a coupling of surface states.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-09-08 | Physical Review B |