期刊
PHYSICAL REVIEW B
卷 97, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.97.121113
关键词
-
资金
- Argentine ANPCyT [PICT 2012-1069, PICT 2016-0402]
- PIP (CONICET)
- DOE BES [DE-FG02-99ER45761]
- NSF [ACI-1548562]
A repulsive Coulomb interaction between electrons in different orbitals in correlated materials can give rise to bound quasiparticle states. We study the nonhybridized two-orbital Hubbard model with intra- (inter) orbital interaction U (U-12) and different bandwidths using an improved dynamical mean-field theory numerical technique which leads to reliable spectra on the real energy axis directly at zero temperature. We find that a finite density of states at the Fermi energy in one band is correlated with the emergence of well-defined quasiparticle states at excited energies Delta = U - U-12 in the other band. These excitations are interband holon-doublon bound states. At the symmetric point U = U-12, the quasiparticle peaks are located at the Fermi energy, leading to a simultaneous and continuous Mott transition settling a long-standing controversy.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据