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Lateral quantum wells at vicinal Au(111) studied with angle-resolved photoemission
- Source :
- E-Prints Complutense: Archivo Institucional de la UCM, Universidad Complutense de Madrid, E-Prints Complutense. Archivo Institucional de la UCM, instname, Physical Review B: Condensed Matter and Materials Physics (1998-2015), Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2002, 66 (24), Digital.CSIC. Repositorio Institucional del CSIC
- Publication Year :
- 2002
- Publisher :
- American Physical Society, 2002.
-
Abstract
- Electrons at noble metal surfaces can be confined within terraces leading to one-dimensional surface states. These can be studied with angle-resolved photoemission from vicinal surfaces with regular arrays of (111)-oriented terraces. Here we show the case of Au(23 23 21), which is vicinal to Au(111) and displays L=56Å wide terraces. The surface state band appears broken up into three quantum well levels that match to those of the infinite quantum well of the same width L. Their parallel momentum dependent photoemission intensity allows mapping the probability density of the confined wave function in reciprocal space using angle-resolved photoemission. By Fourier transformation, their respective experimental wave functions in real space are obtained and compared to the case of the infinite quantum-well, showing excellent agreement. Final state step superlattice diffraction effects have also been observed. Finally, we observe the quenching of the characteristic spin-orbit coupling of Au(111) in the confinement direction. This is another indication of the one-dimensional character of the surface state, as confirmed with first order perturbation theory.<br />A.Mu., F.J.G. de A., E.V.C., Y.M.K., and J.E.O. are supported by the Universidad del Pais Vasco Grant No. 1/UPV/EHU/00057.240-EA-8078/2000. V.R. and S.R. are supported by the CNRS-ULTIMATECH program, the CRIF and the Universite de Paris 7. A. Ma. was supported by Contract No. HPMF-CT-2000-00565. The experiments at the SRC were supported by NSF Grants No. DMR-0084402, DMR9704196, and DMR-9815416.
- Subjects :
- [PHYS]Physics [physics]
Materials science
Condensed matter physics
Física de materiales
Superlattice
Inverse photoemission spectroscopy
Angle-resolved photoemission spectroscopy
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
7. Clean energy
Reciprocal lattice
0103 physical sciences
010306 general physics
0210 nano-technology
Wave function
Quantum well
Vicinal
Surface states
Subjects
Details
- ISSN :
- 10980121 and 1550235X
- Database :
- OpenAIRE
- Journal :
- E-Prints Complutense: Archivo Institucional de la UCM, Universidad Complutense de Madrid, E-Prints Complutense. Archivo Institucional de la UCM, instname, Physical Review B: Condensed Matter and Materials Physics (1998-2015), Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2002, 66 (24), Digital.CSIC. Repositorio Institucional del CSIC
- Accession number :
- edsair.doi.dedup.....c5c97514b6dcb7dd21050a38e863a949