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Cabra DC, De Martino A, Grynberg MD, et al. Random bond XXZ chains with modulated couplings. Phys Rev Lett. 2000;85(22):4791-4doi: 10.1103/PhysRevLett.85.4791.
Cabra, D. C., De Martino A, Grynberg, M. D., Peysson, S., & Pujol, P. (2000). Random bond XXZ chains with modulated couplings. Physical review letters, 85(22), 4791-4. https://doi.org/10.1103/PhysRevLett.85.4791
Cabra, et al. "Random bond XXZ chains with modulated couplings." Physical review letters vol. 85,22 (2000): 4791-4. doi: https://doi.org/10.1103/PhysRevLett.85.4791
Cabra DC, De Martino A, Grynberg MD, Peysson S, Pujol P. Random bond XXZ chains with modulated couplings. Phys Rev Lett. 2000 Nov 27;85(22):4791-4. doi: 10.1103/PhysRevLett.85.4791. PMID: 11082653.
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Phys Rev Lett. 2000 Nov 27;85(22):4791-4. doi: 10.1103/PhysRevLett.85.4791.

Random bond XXZ chains with modulated couplings.

Physical review letters

Cabra, De Martino A, Grynberg, Peysson, Pujol

Affiliations

  1. Departamento de Fisica, Universidad Nacional de la Plata, C.C. 67, (1900) La Plata, Argentina and Facultad de Ingenieria, Universidad Nacional de Lomas de Zamora, Cno. de Cintura y Juan XXIII, (1832) Lomas de Zamora, Argentina.

PMID: 11082653 DOI: 10.1103/PhysRevLett.85.4791

Abstract

The magnetization behavior of q-periodic antiferromagnetic spin- 1/2 Heisenberg chains under uniform magnetic fields is investigated in a background of disorder exchange distributions. By means of both real space decimation procedures and numerical diagonalizations in XX chains, it is found that for binary disorder the magnetization exhibits wide plateaus at values of 1+2(p-1)/q, where p is the disorder strength. In contrast, no spin gaps are observed in the presence of continuous exchange distributions. We also study the magnetic susceptibility at low magnetic fields.

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