TY  - JOUR
AU  - Liebsch, A.
AU  - Ishida, H.
TI  - Subband Filling and Mott Transition in Ca2-xSrxRuO4
JO  - Physical review letters
VL  - 98
SN  - 0031-9007
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-59216
SP  - 216403
PY  - 2007
N1  - Record converted from VDB: 12.11.2012
AB  - A new concept is proposed for the paramagnetic metal insulator transition in the layer perovskite Ca2-xSrxRuO4. Whereas the pure Sr compound is metallic up to large Coulomb energies due to strong orbital fluctuations, structural changes induced by doping with Ca give rise to an interorbital charge transfer which makes the material extremely sensitive to local correlations. Using dynamical mean field theory based on finite temperature multiband exact diagonalization, it is shown that the combination of crystal field splitting and on-site Coulomb interactions leads to complete filling of the d(xy) band and to a Mott transition in the half-filled d(xz,yz) bands.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000246776100042
DO  - DOI:10.1103/PhysRevLett.98.216403
UR  - https://juser.fz-juelich.de/record/59216
ER  -