Low-temperature properties of the random Heisenberg antiferromagnetic chain

Dasgupta, Chandan ; Ma, Shang-keng (1980) Low-temperature properties of the random Heisenberg antiferromagnetic chain Physical Review B, 22 (3). pp. 1305-1319. ISSN 0163-1829

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Official URL: http://prb.aps.org/abstract/PRB/v22/i3/p1305_1

Related URL: http://dx.doi.org/10.1103/PhysRevB.22.1305

Abstract

The one-dimensional quantum spin-½ Heisenberg antiferromagnetic model with randomly distributed interaction strengths is solved approximately for several different distributions. Ground-state energy and low-temperature properties are evaluated. Universal qualitative features are found in the specific heat and the magnetic susceptibility, which display a power-law dependence on temperature. Such features hold for nonsingular distributions as well as for distributions with power-law divergence at the origin. The approximate method of solution is based on successive eliminations of spins coupled by the maximum coupling constant.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:22859
Deposited On:25 Nov 2010 13:56
Last Modified:25 Nov 2010 13:56

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