UNEXPECTED NEGATIVE EXCHANGE SPLITTING OF THE FE(001) IMAGE STATE

Authors
DEROSSI S CICCACCI F CRAMPIN S
Citation
S. Derossi et al., UNEXPECTED NEGATIVE EXCHANGE SPLITTING OF THE FE(001) IMAGE STATE, Physical review letters, 77(5), 1996, pp. 908-911
Citations number
35
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
77
Issue
5
Year of publication
1996
Pages
908 - 911
Database
ISI
SICI code
0031-9007(1996)77:5<908:UNESOT>2.0.ZU;2-J
Abstract
We have observed a surprising negative exchange splitting of the n = 1 image-potential surface state at Fe(001) using spin resolved inverse photoemission, indicating that the minority-spin level has a lower ene rgy than the majority-spin level. Calculations show the negative sign results from two superimposing effects. A true reverse polarization of the image state, which hybridizes with bulk bands, which is then enha nced by matrix element effects in inverse photoemission.