このエントリーをはてなブックマークに追加
ID 19351
file
creator
Yamakawa, K.
Saitoh, Tomohiko
Inaba, Jungo
Katsufuji, Takuro
Higashiguchi, Mitsuharu
subject
strontium compounds
lanthanum compounds
band structure
photoelectron spectra
carrier density
localised states
charge transfer states
abstract
We present the electronic structure of Sr1-(x+y)Lax+yTi1-xCrxO3 investigated by high-resolution photoemission spectroscopy. In the vicinity of the Fermi level, it was found that the electronic structure was composed of a Cr 3d local state with the t2g3 configuration and a Ti 3d itinerant state. The energy levels of these Cr and Ti 3d states are well interpreted by the difference of the charge-transfer energy of both ions. The spectral weight of the Cr 3d state is completely proportional to the spin concentration x irrespective of the carrier concentration y, indicating that the spin density can be controlled by x as desired. In contrast, the spectral weight of the Ti 3d state is not proportional to y, depending on the amount of Cr doping.
journal title
Physical Review Letters
volume
Volume 96
issue
Issue 6
start page
067203-1
end page
067203-4
date of issued
2006-02-14
publisher
American Physical Society
issn
0031-9007
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2006 The American Physical Society.
relation url
department
Graduate School of Science
Hiroshima Synchrotron Radiation Center