Exact solution of a t-J chain with impurity

authored by

Gerald Bedürftig, Fabian H.L. Eßler, Holger Frahm

Abstract

We study the effects of an integrable impurity in a periodic t-J chain. The impurity couples to both spin and charge degrees of freedom and has the interesting feature that the interaction with the bulk can be varied continuously without losing integrability. We first consider ground state properties close to half-filling in the presence of a small bulk magnetic field. We calculate the impurity contributions to the (zero-temperature) susceptibilities and the low-temperature specific heat and determine the high-temperature characteristics of the impurity. We then investigate transport properties by computing the spin and charge stiffnesses at zero temperature. Finally the impurity phase shifts are calculated and the existence of an impurity bound state in the holon sector is established.

Organisation(s)

Institute of Theoretical Physics

External Organisation(s)

University of Oxford

Type

Article

Journal

Nuclear Physics B

Volume

489

Pages

697-736

No. of pages

40

ISSN

0550-3213

Publication date

07.04.1997

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

Electronic version(s)

https://doi.org/10.1016/S0550-3213(97)00059-X (Access: Unknown)