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Volumn 384, Issue 1-2, 2003, Pages 185-204

Fluctuation induced diamagnetism in La1.9Sr0.1CuO4 superconductors well inside the high-reduced temperature and the finite magnetic field regimes

Author keywords

Critical phenomena; Fluctuation effects; Ginzburg Landau theory; Magnetization

Indexed keywords

DIAMAGNETISM; HIGH TEMPERATURE SUPERCONDUCTORS; MAGNETIC FIELDS; MAGNETIZATION; SUPERCONDUCTING TRANSITION TEMPERATURE;

EID: 0037437812     PISSN: 09214534     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0921-4534(02)01864-6     Document Type: Article
Times cited : (29)

References (50)
  • 10
  • 11
    • 0012170587 scopus 로고    scopus 로고
    • See, e.g., Sections 8.3-8.5 in Ref. [1]
    • See, e.g., Sections 8.3-8.5 in Ref. [1].
  • 27
    • 0012131878 scopus 로고    scopus 로고
    • For some illuminating considerations about these aspects of the GGL approach see M. Tinkham in Section 8.4 of Ref. [1]. See also Ref. [9] Section 3.1
    • For some illuminating considerations about these aspects of the GGL approach see M. Tinkham in Section 8.4 of Ref. [1]. See also Ref. [9] Section 3.1.
  • 31
    • 0012133252 scopus 로고    scopus 로고
    • note
    • A penalization (but not a cutoff) of the most energetic fluctuating modes was earlier proposed by Patton and coworkers Ref. [13] and by Nam Ref. [14] when studying the short-wavelength regime of the fluctuation induced diamagnetism at high applied magnetic fields in LTSC. However, under this penalization, which does not take into account the limitations on the superconducting wave function associated with the uncertainty principle, the FD does not become zero at any accessible reduced temperature.
  • 43
    • 0004056428 scopus 로고
    • For a detailed derivation of Eq. (4) in the 3D-case see, e.g., Oxford: Pergamon Press. Section 49
    • For a detailed derivation of Eq. (4) in the 3D-case see, e.g., Landau L., Lifchitz E. Statistical Physics. vol. 2:1978;Pergamon Press, Oxford. Section 49.
    • (1978) Statistical Physics , vol.2
    • Landau, L.1    Lifchitz, E.2
  • 44
    • 0000143542 scopus 로고
    • note
    • An expression similar to Eq. (4) was already used by Koshelev to calculate the FD in single layered superconductors in the 2D limit without any cutoff. See Koshelev A.E. Phys. Rev. B. 50:1994;506.
    • (1994) Phys. Rev. B , vol.50 , pp. 506
    • Koshelev, A.E.1
  • 45
    • 0000083858 scopus 로고
    • LG is the so-called Levanyuk-Ginzburg reduced-temperature (see, e.g., Ref. [32]). At high reduced-temperatures, when ξ(ε) becomes of the order of ξ(0) , various new terms not included in the conventional GGL functional (e.g., the powers higher than two of the gradient of the order parameter) could become particularly relevant, or even it could be not applicable any mean-field-like approach. Nevertheless, the conventional GGL approximation was already used by different authors beyond the ε≪1 condition when analyzing the paraconductivity-behaviour at high reduced temperatures in both LTSC (see, e.g., W.L. Johnson, C.C. Tsuei, and P. Chaudhari, Phys. Rev. B 17 (1978) 2884) and HTSC (see, e.g., Refs. [24-26]). In these previous works the GGL approach, regularized through a momentum cutoff, was unable to explain the paraconductivity measurements for ε≳0.1 . Our present results suggest that the limitation of the shrinkage of the superconducting wave function is the dominant effect when ε approaches c , and that both the GGL approach under a total-energy cutoff and the mean-field critical exponent of ξ(ε) , x=-1/2 , remains qualitatively valid even for ε≃c.
    • (1978) Phys. Rev. B , vol.17 , pp. 2884
    • Johnson, W.L.1    Tsuei, C.C.2    Chaudhari, P.3
  • 50


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.