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Title: Surface electronic structures of the Eu- and Ca-induced so-called Si(111)-(5x1) reconstructions

Abstract

We have investigated the electronic structures of the so-called Eu- and Ca-induced Si(111)-(5x1) surfaces by using angle-resolved photoelectron spectroscopy (ARPES) and low-energy electron diffraction (LEED). The LEED patterns of these surfaces indicate that the periodicities of both surfaces are actually (5x4). In the ARPES study, seven surface states were observed on each (5x4) reconstruction. Of these surface states, the dispersions of five of them show good agreement with those of the Eu- and Ca-induced (3x2) honeycomb-chain-channel (HCC) surfaces and the dispersions of the two other states agree well with those of the Eu- and Ca-induced (2x1) Seiwatz surfaces along the [110] direction--i.e., the direction parallel to the adsorbate chain. Taking the dispersion behavior of these surface states into account, we conclude that the interaction between the nearest-neighbor HCC chain and Seiwatz chain is quite small and that the electronic structure of one chain hardly affects the electronic structure of its neighboring chain. We also discuss the atomic structure of the Eu- and Ca-induced Si(111)-(5x1) reconstructions based on their electronic structures.

Authors:
;  [1]; ; ;  [2]
  1. Graduate School of Science and Technology, Chiba University, Chiba 263-8522 (Japan)
  2. Department of Physics, Chemistry and Biology, Linkoeping University, S-581 83 Linkoeping (Sweden)
Publication Date:
OSTI Identifier:
20853974
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 74; Journal Issue: 23; Other Information: DOI: 10.1103/PhysRevB.74.235311; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CALCIUM; ELECTRON DIFFRACTION; ELECTRONIC STRUCTURE; EUROPIUM; PERIODICITY; PHOTOELECTRON SPECTROSCOPY; SEMICONDUCTOR MATERIALS; SILICON; SURFACES

Citation Formats

Sakamoto, Kazuyuki, Ueno, Nobuo, Eriksson, P. E. J., Pick, A., and Uhrberg, R. I. G. Surface electronic structures of the Eu- and Ca-induced so-called Si(111)-(5x1) reconstructions. United States: N. p., 2006. Web. doi:10.1103/PHYSREVB.74.235311.
Sakamoto, Kazuyuki, Ueno, Nobuo, Eriksson, P. E. J., Pick, A., & Uhrberg, R. I. G. Surface electronic structures of the Eu- and Ca-induced so-called Si(111)-(5x1) reconstructions. United States. doi:10.1103/PHYSREVB.74.235311.
Sakamoto, Kazuyuki, Ueno, Nobuo, Eriksson, P. E. J., Pick, A., and Uhrberg, R. I. G. Fri . "Surface electronic structures of the Eu- and Ca-induced so-called Si(111)-(5x1) reconstructions". United States. doi:10.1103/PHYSREVB.74.235311.
@article{osti_20853974,
title = {Surface electronic structures of the Eu- and Ca-induced so-called Si(111)-(5x1) reconstructions},
author = {Sakamoto, Kazuyuki and Ueno, Nobuo and Eriksson, P. E. J. and Pick, A. and Uhrberg, R. I. G.},
abstractNote = {We have investigated the electronic structures of the so-called Eu- and Ca-induced Si(111)-(5x1) surfaces by using angle-resolved photoelectron spectroscopy (ARPES) and low-energy electron diffraction (LEED). The LEED patterns of these surfaces indicate that the periodicities of both surfaces are actually (5x4). In the ARPES study, seven surface states were observed on each (5x4) reconstruction. Of these surface states, the dispersions of five of them show good agreement with those of the Eu- and Ca-induced (3x2) honeycomb-chain-channel (HCC) surfaces and the dispersions of the two other states agree well with those of the Eu- and Ca-induced (2x1) Seiwatz surfaces along the [110] direction--i.e., the direction parallel to the adsorbate chain. Taking the dispersion behavior of these surface states into account, we conclude that the interaction between the nearest-neighbor HCC chain and Seiwatz chain is quite small and that the electronic structure of one chain hardly affects the electronic structure of its neighboring chain. We also discuss the atomic structure of the Eu- and Ca-induced Si(111)-(5x1) reconstructions based on their electronic structures.},
doi = {10.1103/PHYSREVB.74.235311},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 23,
volume = 74,
place = {United States},
year = {Fri Dec 15 00:00:00 EST 2006},
month = {Fri Dec 15 00:00:00 EST 2006}
}