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Article overview
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Low-frequency dynamics of disordered XY spin chains and pinned density waves: from localized spin waves to soliton tunneling | Michael M. Fogler
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18 Jun 2001 | Journal: | Phys. Rev. Lett. 88, 186402 (2002) | Subject: | Disordered Systems and Neural Networks; Strongly Correlated Electrons | cond-mat.dis-nn cond-mat.str-el | Affiliation: | MIT | Abstract: | A long-standing problem of the low-energy dynamics of a disordered XY spin chain is re-examined. 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 calculated. The results apply to other periodic glassy systems such as pinned density waves, planar vortex lattices, stripes, and disordered Luttinger liquids. | Source: | arXiv, cond-mat/0106350 | Services: | Forum | Review | PDF | Favorites |
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