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Electron and positron states on the (001) surface of paramagnetic chromium
Author(s) -
Fry J. L.,
Brener N. E.,
Mcnutt J. D.
Publication year - 2009
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.560180865
Subject(s) - brillouin zone , paramagnetism , chromium , work function , electron , surface states , condensed matter physics , positron , atomic physics , fermi surface , electronic band structure , fermi level , chemistry , density of states , surface (topology) , physics , nuclear physics , electrode , geometry , mathematics , organic chemistry
Abstract Self‐consistent electron energy bands for paramagnetic chromium have been projected into the two‐dimensional Brillouin zone to investigate the possibility of localized states on the (001) surface. Several gaps occur, including some at the bulk Fermi energy, suggesting surface states. Analysis with Mattis' conditions for surface states supports this conclusion. The potential produced by the self‐consistent electron charge density was used to generate a positron band structure which was also projected into the (001) Brillouin zone. Suitable conditions for surface states were again found, but the apparent negative work function for positrons in chromium complicates their experimental observation.