Infinite-range quantum random Heisenberg magnet
We study with exact diagonalization techniques the Heisenberg model for a system of SU(2) spins with S=1/2 and random infinite-range exchange interactions. We calculate the critical temperature Tg for the spin-glass to paramagnetic transition. We obtain Tg≈0.13, in good agreement with previous quant...
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| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
| Publicado: |
American Physical Society
2002
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
| LEADER | 04868caa a22006977a 4500 | ||
|---|---|---|---|
| 001 | PAPER-5343 | ||
| 003 | AR-BaUEN | ||
| 005 | 20241001112148.0 | ||
| 008 | 190411s2002 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-0036612560 | |
| 030 | |a PRBMD | ||
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Arrachea, Liliana del Carmen | |
| 245 | 1 | 0 | |a Infinite-range quantum random Heisenberg magnet |
| 260 | |b American Physical Society |c 2002 | ||
| 270 | 1 | 0 | |m Arrachea, L.; Departamento de Fisica, FCEyN Universidad de Buenos Aires, Pabellon I, Ciudad Universitaria, (1428) Buenos Aires, Argentina |
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| 504 | |a Rozenberg, M.J., Arrachea, L., Physica B, , to be published | ||
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| 504 | |a Arrachea, L., (2000) Phys. Rev. B, 62, p. 10033 | ||
| 504 | |a Rozenberg, M.J., Grempel, D.R., (1998) Phys. Rev. Lett., 81, p. 2550 | ||
| 504 | |a note; Forster, D., (1994) Hydrodynamic Fluctuations, Broken Symmetry, and Correlation Functions, , Addison Wesley, New York | ||
| 504 | |a Sherrington, D., Kirkpatrick, S., (1975) Phys. Rev. Lett., 35, p. 1792 | ||
| 506 | |2 openaire |e Política editorial | ||
| 520 | 3 | |a We study with exact diagonalization techniques the Heisenberg model for a system of SU(2) spins with S=1/2 and random infinite-range exchange interactions. We calculate the critical temperature Tg for the spin-glass to paramagnetic transition. We obtain Tg≈0.13, 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 Χ″(ω,T) at T=0 and analyze their evolution as T increases. We also calculate the specific heat Cv(T). We find that it displays a smooth maximum at TM≈0.25, in good qualitative agreement with experiments. We argue that the fact that TM>Tg is due to a quantum disorder effect. |l eng | |
| 593 | |a Departamento de Fisica, FCEyN Universidad de Buenos Aires, Pabellon I, Ciudad Universitaria, (1428) Buenos Aires, Argentina | ||
| 690 | 1 | 0 | |a GLASS |
| 690 | 1 | 0 | |a ACCELERATION |
| 690 | 1 | 0 | |a ARTICLE |
| 690 | 1 | 0 | |a CALCULATION |
| 690 | 1 | 0 | |a MAGNET |
| 690 | 1 | 0 | |a MATHEMATICAL ANALYSIS |
| 690 | 1 | 0 | |a MODEL |
| 690 | 1 | 0 | |a MONTE CARLO METHOD |
| 690 | 1 | 0 | |a QUANTUM MECHANICS |
| 700 | 1 | |a Rozenberg, M.J. | |
| 773 | 0 | |d American Physical Society, 2002 |g v. 65 |h pp. 2244301-22443011 |k n. 22 |p Phys. Rev. B Condens. Matter Mater. Phys. |x 01631829 |w (AR-BaUEN)CENRE-397 |t Physical Review B - Condensed Matter and Materials Physics | |
| 856 | 4 | 1 | |u https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036612560&doi=10.1103%2fPhysRevB.65.224430&partnerID=40&md5=d3c420ebb31af2496618cf9ad2ea49ee |y Registro en Scopus |
| 856 | 4 | 0 | |u https://doi.org/10.1103/PhysRevB.65.224430 |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_01631829_v65_n22_p2244301_Arrachea |y Handle |
| 856 | 4 | 0 | |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01631829_v65_n22_p2244301_Arrachea |y Registro en la Biblioteca Digital |
| 961 | |a paper_01631829_v65_n22_p2244301_Arrachea |b paper |c PE | ||
| 962 | |a info:eu-repo/semantics/article |a info:ar-repo/semantics/artículo |b info:eu-repo/semantics/publishedVersion | ||
| 963 | |a VARI | ||
| 999 | |c 66296 | ||