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
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
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;
Key words: nuclear magnetic resonance, spin chain, magnetic impurity.