Artículo
Arrachea, L.; Rozenberg, M.J. "Infinite-range quantum random Heisenberg magnet" (2002) Physical Review B - Condensed Matter and Materials Physics. 65(22):1-11
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Abstract:
We study with exact diagonalization techniques the Heisenberg model for a system of SU(2) spins with (formula presented) and random infinite-range exchange interactions. We calculate the critical temperature (formula presented) for the spin-glass to paramagnetic transition. We obtain (formula presented) in good agreement with previous quantum Monte Carlo and analytical estimates. We provide a detailed picture for the different kind of excitations which intervene in the dynamical response (formula presented) at (formula presented) and analyze their evolution as T increases. We also calculate the specific heat (formula presented) We find that it displays a smooth maximum at (formula presented) in good qualitative agreement with experiments. We argue that the fact that (formula presented) is due to a quantum disorder effect. © 2002 The American Physical Society.
Registro:
| Documento: | Artículo |
| Título: | Infinite-range quantum random Heisenberg magnet |
| Autor: | Arrachea, L.; Rozenberg, M.J. |
| Filiación: | Departamento de Física, FCEyN Universidad de Buenos Aires, Ciudad Universitaria, Pabellón I, Buenos Aires, 1428, Argentina Scuola Internazionale Superiore di Studi Avanzati (SISSA), Istituto Nazionale per la Fisica della Materia (INFM), Unità di Ricerca Trieste-SISSA, Via Beirut 4, Trieste, I-34014, Italy |
| Año: | 2002 |
| Volumen: | 65 |
| Número: | 22 |
| Página de inicio: | 1 |
| Página de fin: | 11 |
| DOI: | http://dx.doi.org/10.1103/PhysRevB.65.224430 |
| Título revista: | Physical Review B - Condensed Matter and Materials Physics |
| Título revista abreviado: | Phys. Rev. B Condens. Matter Mater. Phys. |
| ISSN: | 10980121 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v65_n22_p1_Arrachea |
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Citas:
---------- APA ----------
Arrachea, L. & Rozenberg, M.J. (2002) . Infinite-range quantum random Heisenberg magnet. Physical Review B - Condensed Matter and Materials Physics, 65(22), 1-11.http://dx.doi.org/10.1103/PhysRevB.65.224430
---------- CHICAGO ----------
Arrachea, L., Rozenberg, M.J. "Infinite-range quantum random Heisenberg magnet" . Physical Review B - Condensed Matter and Materials Physics 65, no. 22 (2002) : 1-11.http://dx.doi.org/10.1103/PhysRevB.65.224430
---------- MLA ----------
Arrachea, L., Rozenberg, M.J. "Infinite-range quantum random Heisenberg magnet" . Physical Review B - Condensed Matter and Materials Physics, vol. 65, no. 22, 2002, pp. 1-11.http://dx.doi.org/10.1103/PhysRevB.65.224430
---------- VANCOUVER ----------
Arrachea, L., Rozenberg, M.J. Infinite-range quantum random Heisenberg magnet. Phys. Rev. B Condens. Matter Mater. Phys. 2002;65(22):1-11.http://dx.doi.org/10.1103/PhysRevB.65.224430
