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Volumn 54, Issue 1, 1996, Pages 619-636

Monte Carlo studies of the ordering of ceramic superconductors: Chiral-glass, orbital-glass, and nonlinear susceptibilities

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EID: 0001687013     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.54.619     Document Type: Article
Times cited : (52)

References (79)
  • 26
    • 1542386208 scopus 로고
    • this paper, the authors claimed on the basis of an XY spin-glass Hamiltonian and replica trick the existence of a stable spin-glass-like state characterized by a nonzero Edwards-Anderson order parameter associated with the phase degree of freedom of the Cooper-pair wave function, (Formula presented) =〈exp[i((Formula presented) -(Formula presented))]〉 (θ denotes the phase, α and Β are replica indices). Although such a state characterized by nonzero (Formula presented) is certainly possible in the mean-field limit, numerical simulations on an XY spin glass have revealed that this does not occur in three dimensions at least for the symmetric distributions of nearest-neighbor bonds (Refs. 19-21)
    • Among researchers of spin glasses, there now seems to be a consensus that a three-dimensional XY spin glass does not exhibit an equilibrium spin-glass transition of the conventional type at any finite temperature (Refs. 19-21). Then, a true thermodynamic intergranular phase transition with broken U(1) gauge symmetry seems rather unlikely in d-wave ceramic superconductors. One may suspect that the coupling between the XY-spin-like phase variables and the electromagnetic fields (gauge fields), which is absent in XY spin glasses but present in superconductors, might stabilize an ordering. In fact, however, such coupling to the gauge fields make the otherwise long-ranged interaction between vortices short ranged (Ref. 22), and makes the U(1) gauge-symmetry-breaking phase transition even more unlikely. Nevertheless, spin-glass-type random ordering of the phase of the superconducting order parameter has occasionally been discussed: See, for example, S. V. Panyukov and A. D. Zaikin, Physica B 203, 527 (1994). In this paper, the authors claimed on the basis of an XY spin-glass Hamiltonian and replica trick the existence of a stable spin-glass-like state characterized by a nonzero Edwards-Anderson order parameter associated with the phase degree of freedom of the Cooper-pair wave function, (Formula presented) =〈exp[i((Formula presented) -(Formula presented))]〉 (θ denotes the phase, α and Β are replica indices). Although such a state characterized by nonzero (Formula presented) is certainly possible in the mean-field limit, numerical simulations on an XY spin glass have revealed that this does not occur in three dimensions at least for the symmetric distributions of nearest-neighbor bonds (Refs. 19-21).
    • (1994) Physica B , vol.203 , pp. 527
    • Panyukov, S.1    Zaikin, A.2
  • 27
  • 28
    • 0004215583 scopus 로고
    • Cambridge University Press, Cambridge
    • K. H. Fischer and J. D. Hertz, Spin Glasses (Cambridge University Press, Cambridge, 1991).
    • (1991) Spin Glasses
    • Fischer, K.1    Hertz, J.2
  • 35
  • 56
    • 0024715721 scopus 로고
    • K.-H. Müller, Physica C 159, 717 (1989).
    • (1989) Physica C , vol.159 , pp. 717
  • 72


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.