https://doi.org/10.1140/epjb/e2002-00359-6
Superconducting order in low-dimensional boson-fermion model: absence of finite-temperature transition
Unità INFM di Salerno-Coherentia, Dipartimento di
Fisica “E.R. Caianiello”, Università di Salerno,
84081
Baronissi (Salerno), Italy
Corresponding author: a canio@sa.infn.it
Received:
21
August
2002
Published online:
19
November
2002
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.
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
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002
