On the width of the full-critical region for thermal fluctuations around the superconducting transition in layered superconductors

Europhysics Letters

Volumn 39, Issue 2, 1997, Pages 177-182

  Ramallo, M V ^a   Vidal, F ^a  

^a NONE

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0031570990     PISSN: 02955075     EISSN: None     Source Type: Journal    
DOI: 10.1209/epl/i1997-00332-7     Document Type: Article

References (25)

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4. See, e.g., MARCENAT C., CALEMCZUK R. and CARRINGTON A., in Coherence in High Temperature Superconductors, edited by G. DEUTSCHER and A. REVCOLEVSCHI (World Scientific, Singapore) 1995, p. 101, and references therein.
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13. As already noted in the works of Levanyuk [11] and Ginzburg [12], other definitions of TLG are possible, as the ones based on the comparison of various order parameter thermal averages (see also HOHENBERG P. C., in Fluctuations in Superconductors, edited by E. S. GORE and F. CHILTON (Standford Research Institute, Menlo Park, CA) 1968, p. 305). However, they lead to expressions of ELG similar to the one resulting from the heat capacity analysis, except for a numerical prefactor. In fact, such a prefactor ambiguity may be seen as a signature of the qualitativeness of any criterion for the crossover between both critical regions (see, e.g., ref. [3]). Let us stress, however, that the definition used here seems to be the more adequate one, as it is based on a physical observable rather than on more indirect considerations (see also GINZBURG V. L., LEVANYUK A. P. and SOBYANIN A. A., Ferroelectrics, 73 (1987) 171).
14. As already noted in the works of Levanyuk [11] and Ginzburg [12], other definitions of TLG are possible, as the ones based on the comparison of various order parameter thermal averages (see also HOHENBERG P. C., in Fluctuations in Superconductors, edited by E. S. GORE and F. CHILTON (Standford Research Institute, Menlo Park, CA) 1968, p. 305). However, they lead to expressions of ELG similar to the one resulting from the heat capacity analysis, except for a numerical prefactor. In fact, such a prefactor ambiguity may be seen as a signature of the qualitativeness of any criterion for the crossover between both critical regions (see, e.g., ref. [3]). Let us stress, however, that the definition used here seems to be the more adequate one, as it is based on a physical observable rather than on more indirect considerations (see also GINZBURG V. L., LEVANYUK A. P. and SOBYANIN A. A., Ferroelectrics, 73 (1987) 171).
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25. 7-δ .