Orbital-selective Mott transitions in the degenerate Hubbard model

被引：268
作者：
Koga, A
Kawakami, N
Rice, TM
Sigrist, M
机构：
[1] Osaka Univ, Dept Appl Phys, Suita, Osaka 5650871, Japan
[2] ETH Honggerberg, CH-8093 Zurich, Switzerland
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 21期
关键词：
D O I：
10.1103/PhysRevLett.92.216402
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigate the Mott transitions in two-band Hubbard models with different bandwidths. Applying dynamical mean field theory, we discuss the stability of itinerant quasiparticle states in each band. We demonstrate that separate Mott transitions occur at different Coulomb interaction strengths in general, which merge to a single transition only under special conditions. This kind of behavior may be relevant for the physics of the single-layer ruthenates, Ca2-xSrxRuO4.
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页码：216402 / 1
页数：4
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