Low-temperature critical properties and crossovers of a spin-1/2 planar ferromagnet in 4-epsilon dimensions (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Low-temperature critical properties and crossovers of a spin-1/2 planar ferromagnet in 4-epsilon dimensions (Articolo in rivista) (literal)

Anno

• 2008-01-01T00:00:00+01:00 (literal)

Alternative label

• Mercaldo, MT; D'Auria, AC; De Cesare, L; Rabuffo, I (2008)
  Low-temperature critical properties and crossovers of a spin-1/2 planar ferromagnet in 4-epsilon dimensions
  
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Mercaldo, MT; D'Auria, AC; De Cesare, L; Rabuffo, I (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 77 (literal)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• \"[Mercaldo, M. T.; De Cesare, L.; Rabuffo, I.] Univ Salerno, Dipartimento Fis ER Caianiello, I-84081 Salerno, Italy; [Mercaldo, M. T.; De Cesare, L.; Rabuffo, I.] Unita Salerno, CNISM, I-84081 Salerno, Italy; [D'Auria, A. Caramico] Univ Naples Federico 2, Dipartimento Sci Fisiche, I-80125 Naples, Italy; [D'Auria, A. Caramico] CNR INFM, I-80125 Naples, Italy (literal)

Titolo

• Low-temperature critical properties and crossovers of a spin-1/2 planar ferromagnet in 4-epsilon dimensions (literal)

Abstract

• The low-temperature critical properties and crossovers of a spin-1/2 planar ferromagnet in a longitudinal 2 magnetic field are explored in 4-epsilon dimensions in terms of an anisotropic bosonic action, suitable to describe the spin model in the low-temperature regime. This is performed adopting a procedure, which combines a preliminary averaging over dynamic degrees of freedom and a next static Wilson renormalization group transformation. We work to one-loop level to obtain results which are exact to first order in epsilon and believed to be qualitatively correct for 2 < d < 4. Within this static framework, we get the phase boundary, ending in a quantum critical point, and the general expressions for the correlation length and susceptibility as functions of the temperature and the applied magnetic field within the disordered phase. With these basic ingredients, the critical properties and a rich crossover scenario in the influence domain of the quantum critical point are derived in a simple and transparent way. Remarkably, one can speculate that the crossovers, found to occur decreasing the temperature with the magnetic field fixed at its quantum critical point value, might be actually observable in complex magnetic compounds, as suggested by recent experiments. (literal)

Prodotto di

• Proprietà magnetiche, magnetoelastiche e magnetoresistive di nanocompositi e film sottili (MD.P04.008.001) (Modulo)

Autore CNR

• ALVARO CARAMICO D'AURIA (Unità di personale esterno)

Insieme di parole chiave

• Keywords of "Low-temperature critical properties and crossovers of a spin-1/2 planar ferromagnet in 4-epsilon dimensions" (Insieme di parole chiave)

Incoming links:

Autore CNR di

• ALVARO CARAMICO D'AURIA (Unità di personale esterno)

Prodotto

• Proprietà magnetiche, magnetoelastiche e magnetoresistive di nanocompositi e film sottili (MD.P04.008.001) (Modulo)

Insieme di parole chiave di

• Keywords of "Low-temperature critical properties and crossovers of a spin-1/2 planar ferromagnet in 4-epsilon dimensions" (Insieme di parole chiave)