Metallic Continuum Quantum Ferromagnets at Finite Temperature
| Autor: | Marcello B. Silva Neto, Antonio Castro Neto |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2002 |
| Předmět: |
Physics
Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics FOS: Physical sciences General Physics and Astronomy Renormalization group Magnetization Condensed Matter - Strongly Correlated Electrons Ferromagnetism Dissipative system Curie temperature Condensed Matter::Strongly Correlated Electrons Quantum Quantum fluctuation Phase diagram |
| Popis: | We study via renormalization group (RG) and large N methods the problem of continuum SU(N) quantum Heisenberg ferromagnets (QHF) coupled to gapless electrons. We establish the phase diagram of the dissipative problem and investigate the changes in the Curie temperature, magnetization, and magnetic correlation length due to dissipation and both thermal and quantum fluctuations. We show that the interplay between the topological term (Berry's phase) and dissipation leads to non-trivial effects for the finite temperature critical behavior. Corrected typos, new discussion of T=0 results, to appear in Europhys. Lett |
| Databáze: | OpenAIRE |
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