COLLECTIVE EXCITATIONS, PHOTOEMISSION SPECTRA, AND OPTICAL GAPS IN STRONGLY CORRELATED FERMI SYSTEMS

被引：50

作者：

CASTELLANI, C ^{[1
]}

KOTLIAR, G ^{[1
]}

RAIMONDI, R ^{[1
]}

GRILLI, M ^{[1
]}

WANG, Z ^{[1
]}

ROZENBERG, M ^{[1
]}

机构：

[1] RUTGERS STATE UNIV,SERIN PHYS LAB,PISCATAWAY,NJ 08854

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.69.2009

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze the single-particle and collective excitations near the metal to charge-transfer insulator transition, using the slave-boson technique. We show that the Mott transition can be interpreted as a softening of an auxiliary Bose excitation. In the insulating phase the energy of the boson at zero momentum is related to the jump in the chemical potential at zero doping. The dispersion of the collective modes gives rise to the structure of the incoherent Hubbard bands. A similar picture holds for the single-band Hubbard model.

引用

页码：2009 / 2012

页数：4

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