Superconducting order in low-dimensional boson-fermion model: absence of finite-temperature transition |
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Authors: | C. Noce |
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Affiliation: | (1) Unità INFM di Salerno-Coherentia, Dipartimento di Fisica “E.R. Caianiello”, Università di Salerno, 84081 Baronissi (Salerno), Italy, IT |
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Abstract: | We present the application of the McBryan and Spencer method to a model describing a mixture of hard-core bosons and fermions interacting each others via a hybridization coupling. We prove upper bounds for some correlation functions at finite temperature and then rule out the possibility of long-range order of superconducting type in one and two dimensions. Received 21 August 2002 Published online 19 November 2002 |
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Keywords: | PACS. 64.60.-i General studies of phase transitions – 74.20.Mn Nonconventional mechanisms (spin fluctuations, polarons and bipolarons, resonating valence bond model, anyon mechanism, marginal Fermi liquid, Luttinger liquid, etc. – 71.30.+h Metal insulator transitions and other electronic transitions |
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