High-temperature Expansion for Frustrated Magnets: Application to the J1-J2 Model on the BCC Lattice
Autor(en): | Richter, J. Müller, P. Lohmann, A. Schmidt, H.-J. |
Herausgeber: | Labarta, A. | Stichwörter: | Antiferromagnetism; Critical temperatures; Expansion; frustration; high-temperature expansion; Magnetism, Antiferromagnetics; quantum magnetism; Specific heat; structure factor; Structure factors; Temperature dependence; Temperature distribution; Uniform susceptibility, Crystal structure | Erscheinungsdatum: | 2015 | Herausgeber: | Elsevier B.V. | Enthalten in: | Physics Procedia | Band: | 75 | Startseite: | 813 | Seitenende: | 820 | Zusammenfassung: | We present the high-temperature expansion up to 11th order for the specific heat C and the uniform susceptibility χ0 and up to 9th order for the structure factor SQ of the frustrated spin-half J1-J2 Heisenberg model on the BCC lattice. We consider ferromagnetic as well as antiferromagnetic nearest-neighbor exchange J1 and frustrating antiferromagnetic next-nearest- neighbor exchange J2. We discuss the influence of frustration on the temperature dependence of these quantities. Furthermore, we use the HTE series to determine the critical temperature Tc as a function of the frustration parameter J2. © 2015 The Authors. Published by Elsevier B.V. |
Beschreibung: | Conference of 20th International Conference on Magnetism, ICM 2015 ; Conference Date: 5 July 2015 Through 10 July 2015; Conference Code:127718 |
ISSN: | 18753884 | DOI: | 10.1016/j.phpro.2015.12.105 | Externe URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84974678451&doi=10.1016%2fj.phpro.2015.12.105&partnerID=40&md5=63ddf5fa93cad9d07c6e44c1e1d59f99 |
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geprüft am 07.06.2024