CHARGE-SPIN RECOMBINATION IN THE ONE-DIMENSIONAL SUPERSYMMETRIC T-J MODEL

被引:45
|
作者
BARES, PA
CARMELO, JMP
FERRER, J
HORSCH, P
机构
[1] UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801
[2] RUTGERS STATE UNIV,SERIN PHYS LAB,PISCATAWAY,NJ 08855
[3] MAX PLANCK INST FESTKORPERFORSCH,W-7000 STUTTGART 80,GERMANY
来源
PHYSICAL REVIEW B | 1992年 / 46卷 / 22期
关键词
D O I
10.1103/PhysRevB.46.14624
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The dynamical properties of the one-dimensional supersymmetric t-J model in a magnetic field at T = 0 are investigated within the framework of the one-dimensional Landau-liquid theory. The effect of the magnetic field on the low-energy excitation spectrum is analyzed. The transport properties of the t-J model are studied in the low-frequency long-wavelength regime. The effective charge and spin of the elementary carriers are evaluated from the spectral currents. A microscopic criterion for the separation of charge and spin degrees of freedom is established and it is shown that the charge-spin recombination across the ferromagnetic boundary is complete in the supersymmetric t-J model. The charge and spin stiffnesses are expressed in terms of the matrix elements of electronic charge and spin fluctuations between Bethe eigenstates.
引用
收藏
页码:14624 / 14654
页数:31
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