SELF-CONSISTENT ANALYSIS OF SINGLE-PARTICLE EXCITATIONS IN A SPIN-DENSITY-WAVE ANTIFERROMAGNET

被引：15

作者：

ALTMANN, J

BRENIG, W

KAMPF, AP

MULLERHARTMANN, E

机构：

[1] Institut für Theoretische Physik, Universität zu Köln, D-50937 Köln

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.52.7395

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present the results of a self-consistent weak-coupling calculation for the renormalized single-particle properties in an itinerant antiferromagnet. Multiple spin-wave excitations accompany the carrier motion and lead to incoherent contributions to the electronic spectrum. We evaluate the quasiparticle spectral weight and energy dispersion. In agreement with strong-coupling theories we find the minimum of the dispersion of the quasihole energy to have momentum (+/-pi/2,+/-pi/2) and the dispersion to be flat around the corners of the Brillouin zone. Very good agreement is achieved with available exact diagonalization data.

引用

页码：7395 / 7401

页数：7

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