Details
| Original language | English |
|---|---|
| Pages (from-to) | 697-736 |
| Number of pages | 40 |
| Journal | Nuclear Physics B |
| Volume | 489 |
| Issue number | 3 |
| Publication status | Published - 7 Apr 1997 |
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.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Nuclear and High Energy Physics
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In: Nuclear Physics B, Vol. 489, No. 3, 07.04.1997, p. 697-736.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Exact solution of a t-J chain with impurity
AU - Bedürftig, Gerald
AU - Eßler, Fabian H.L.
AU - Frahm, Holger
PY - 1997/4/7
Y1 - 1997/4/7
N2 - 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.
AB - 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.
U2 - 10.1016/S0550-3213(97)00059-X
DO - 10.1016/S0550-3213(97)00059-X
M3 - Article
AN - SCOPUS:0031557517
VL - 489
SP - 697
EP - 736
JO - Nuclear Physics B
JF - Nuclear Physics B
SN - 0550-3213
IS - 3
ER -