Low Frequency Dynamics of DisorderedXYSpin Chains and Pinned Density Waves: From Localized Spin Waves to Soliton Tunneling
نویسندگان
چکیده
منابع مشابه
Low frequency dynamics of disordered XY spin chains and pinned density waves: from localized spin waves to soliton tunneling.
A long-standing problem of the low-energy dynamics of a disordered XY spin chain is reexamined. The case of a rigid chain is studied, where the quantum effects can be treated quasiclassically. It is shown that, as the frequency decreases, the relevant excitations change from localized spin waves to two-level systems to soliton-antisoliton pairs. The linear-response correlation functions are cal...
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J. P. Gauyacq1,2 and N. Lorente3 1CNRS, Institut des Sciences Moléculaires d’Orsay, ISMO, UMR 8214, Bâtiment 351, 91405 Orsay Cedex, France 2Université Paris-Sud, Institut des Sciences Moléculaires d’Orsay, ISMO, UMR 8214, Bâtiment 351, 91405 Orsay Cedex, France 3Centre d’Investigació en Nanociéncia i Nanotecnologia (CSIC-ICN), Campus de la UAB, E-08193 Bellaterra, Spain (Received 14 October 20...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2002
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.88.186402