Field-theory approach to ESR in quantum spin chains

Authors
Oshikawa, M
Citation
M. Oshikawa, Field-theory approach to ESR in quantum spin chains, J PHYS JPN, 69, 2000, pp. 89-94
Citations number
15
Categorie Soggetti
Physics
Journal title
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
ISSN journal
00319015 → ACNP
Volume
69
Year of publication
2000
Supplement
B
Pages
89 - 94
Database
ISI
SICI code
0031-9015(200005)69:<89:FATEIQ>2.0.ZU;2-T
Abstract
A field-theory approach to ESR in quantum spin chains at low temperature T is developed; ESR linewidth and shift are evaluated in perturbation theory. In the presence of the staggered field h, the linewidth grows as h(2)/T-2. This explains the anomalous broadening found experimentally in Cu benzoate at low temperature.