Biermann S, de' Medici L, Georges A
Centre de Physique Théorique, Ecole Polytechnique, 91128 Palaiseau Cedex, France.
Phys Rev Lett. 2005 Nov 11;95(20):206401. doi: 10.1103/PhysRevLett.95.206401.
We study a multiband Hubbard model in its orbital-selective Mott phase, in which localized electrons in a narrow band coexist with itinerant electrons in a wide band. The low-energy physics of this phase is shown to be given by a generalized double-exchange model. The high-temperature disordered phase thus differs from a Fermi liquid, and displays a finite scattering rate of the conduction electrons at the Fermi level, which depends continuously on the spin anisotropy.
我们研究处于轨道选择性莫特相的多带哈伯德模型，其中窄带中的局域电子与宽带中的巡游电子共存。该相的低能物理性质由一个广义双交换模型给出。因此，高温无序相与费米液体不同，并且在费米能级处显示出传导电子的有限散射率，该散射率连续依赖于自旋各向异性。
