Low Temperature Physics: 38, 639 (2012); https://doi.org/10.1063/1.4730977 (6 pages)
Физика Низких Температур: Том 38, Выпуск 7 (Июль 2012), c. 808-815    ( к оглавлению , назад )

NMR relaxation rate of a quantum spin chain with an impurity

A.A. Zvyagin

Max-Planck-Institut für Physik komplexer Systeme, 38 Nöthnitzer Str., Dresden D-01187, Germany

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine
E-mail: zvyagin@ilt.kharkov.ua

Received March 2, 2012


The relaxation rate of the nuclear magnetic resonance is calculated exactly for a model spin-1/2 chain with the magnetic impurity. It is shown that the deviations of the impurity's coupling to the chain and the effective impurity's g-factor from the values of the host chain yield special features in the temperature and magnetic field behavior for the relaxation rate.

PACS: 75.10.Jm Quantized spin models, including quantum spin frustration;
PACS: 75.10.Pq Spin chain models;
PACS: 76.60.–k Nuclear magnetic resonance and relaxation.

Ключевые слова: nuclear magnetic resonance, spin chain, magnetic impurity.