Geodesic
Three-dimensional Gross–Neveu model at nonzero temperature and in an external magnetic field
Teoretičeskaâ i matematičeskaâ fizika, Tome 90 (1992) no. 1, pp. 3-11 Cet article a éte moissonné depuis la source Math-Net.Ru

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The phase structure of the $(2+1)$ Gross–Neveu model at nonzero temperature $T$ and in an external field $H$ is studied in the leading order of the $1/N$ expansion. It is shown that for any fixed value of $T$ there exists a critical value $H_c$ of the magnetic field such that when $H>H_c$ the chiral invariance of the model is spontaneously broken. For fixed $H$, there exists a critical value of the temperature $T_c(H)$ such that for $T>T_c(H)$ the original symmetry of the model is restored. The phase portrait of the model is constructed in the $H-T$ plane. 
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     title = {Three-dimensional {Gross{\textendash}Neveu} model at nonzero temperature and in an external magnetic field},
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}
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K. G. Klimenko. Three-dimensional Gross–Neveu model at nonzero temperature and in an external magnetic field. Teoretičeskaâ i matematičeskaâ fizika, Tome 90 (1992) no. 1, pp. 3-11. http://geodesic.mathdoc.fr/item/TMF_1992_90_1_a0/

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