The Gross-Neveu Model with Chemical Potential; An Effective Theory for Solitonic-Metallic Phase Transition in Polyacetylene?
نویسندگان
چکیده
The Gross-Neveu model with chemical potential is investigated as a lowenergy effective theory of polyacetylene. In particular, we focus on the abrupt change in the features of electric conductivity such as sharp rise in the Pauli paramagnetism at dopant concentration of about 6%. We will try to explain it by the finite density phase transition in the Gross-Neveu model. The thermodynamic Bethe ansatz is combined with the large-N expansion to construct thermodynamics of the Gross-Neveu model. A first-order phase transition Talk presented at APCTP-ICTP Joint Conference ’97 (AIJIC97) on Recent Developements in Nonperturbative Quantum Field Theory, May 26 30, 1997, APCTP, Seoul, Korea
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The TBA, the Gross-Neveu Model, and Polyacetylene
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