Geodesic
Magnetic catalysis in a P-even, chiral-invariant three-dimensional model with four-fermion interaction
Teoretičeskaâ i matematičeskaâ fizika, Tome 124 (2000) no. 2, pp. 323-338

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We study how an external magnetic field $H$ affects the phase structure of a P-even, chiral-invariant three-dimensional model of field theory with a four-fermion interaction. An arbitrarily small, but nonzero, magnetic field induces the spontaneous breaking of the initial symmetry (the magnetic catalysis phenomenon). Depending on the values of the coupling constants, the model vacuum is either P-even or chiral invariant for $H\neq0$. 
@article{TMF_2000_124_2_a9,
     author = {V. Ch. Zhukovskii and K. G. Klimenko and V. V. Khudyakov},
     title = {Magnetic catalysis in a {P-even,} chiral-invariant three-dimensional model with four-fermion interaction},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {323--338},
     publisher = {mathdoc},
     volume = {124},
     number = {2},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2000_124_2_a9/}
}
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V. Ch. Zhukovskii; K. G. Klimenko; V. V. Khudyakov. Magnetic catalysis in a P-even, chiral-invariant three-dimensional model with four-fermion interaction. Teoretičeskaâ i matematičeskaâ fizika, Tome 124 (2000) no. 2, pp. 323-338. http://geodesic.mathdoc.fr/item/TMF_2000_124_2_a9/