Bose-glass transition in thin YBa2Cu3O7−δ films

Kötzler, J.; Nakielski, G.; Wirth, G.

doi:10.1007/bf02562902

Cited by 1 publication

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“…The results shown in Fig. 6 clearly demonstrate significant changes through the defects, except for B < 10mT to be considered elsewhere [18]. We find that the irradiation reduces Field dependence of the critical exponents ν and z determining the divergences of the correlation length and the relaxation times associated with the transition to generic superconductivity.…”

Section: Fluctuation Dynamics and 'Generic' Transition Linessupporting

confidence: 54%

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Nucleation of stable superconductivity in YBCO-films

Kötzler

Advances in Solid State Physics

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By means of the linear dynamic conductivity, inductively measured on epitaxial films between 30mHz and 30 MHz, the transition line Tg(B) to generic superconductivity is studied in fields between B=0 and 19T. It follows closely the melting line Tm(B) described recently in terms of a blowout of thermal vortex loops in clean materials. The critical exponents of the correlation length and time near Tg(B), however, seem to be dominated by some intrinsic disorder. Columnar defects produced by heavy-ion irradiation up to field-equivalent-doses of B φ = 10T lead to a disappointing reduction of Tg(B → 0) while for B > B φ the generic line of the pristine film is recovered. These novel results are also discussed in terms of a loop-driven destruction of generic superconductivity.

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Section: Fluctuation Dynamics and 'Generic' Transition Linessupporting

confidence: 54%

“…vortex-loop model. Additional support for the dominance of these phase fluctuations comes from the observation [18] that the relevant temperature variable, which described the critical behaviour up to vortex densities B = 19 T, is given by t = |T − T g (B)|/(T 0 − T ) (Eq. (3.5).…”

Section: Phase Fluctuations In the Presence Of Disordermentioning

confidence: 98%

Nucleation of stable superconductivity in YBCO-films

Kötzler

Advances in Solid State Physics

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Bose-glass transition in thin YBa2Cu3O7−δ films

Cited by 1 publication

References 10 publications

Nucleation of stable superconductivity in YBCO-films

Nucleation of stable superconductivity in YBCO-films

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