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- Title
Interplay between field-induced and frustration-induced quantum criticalities in the frustrated two-leg Heisenberg ladder.
- Authors
Ramakko, B; Azzouz, M
- Abstract
The antiferromagnetic Heisenberg two-leg ladder in the presence of frustration and an external magnetic field is a system that is characterized by two sorts of quantum criticalities, not only one. One criticality is the consequence of intrinsic frustration, and the other one is a result of the external magnetic field. So the behaviour of each of them in the presence of the other deserves to be studied. Using the Jordan–Wigner transformation in dimensions higher than one and the bond-mean-field theory we examine the interplay between the field-induced and frustration-induced quantum criticalities in this system. The present work could constitute a prototype for those systems showing multiple, perhaps sometimes competing, quantum criticalities. We calculate several physical quantities such as magnetization and spin susceptibility as functions of field and temperature.PACS Nos.: 75.10.Jm 73.43.Nq 75.10.Pq 75.10.Dg
- Subjects
FERROMAGNETIC materials; FERROMAGNETISM; MAGNETIC resonance; MAGNETIC fields; CONTINUUM mechanics; HEISENBERG uncertainty principle; QUANTUM theory
- Publication
Canadian Journal of Physics, 2008, Vol 86, Issue 9, p1125
- ISSN
0008-4204
- Publication type
Article
- DOI
10.1139/P08-050