Nernst Effect and Diamagnetism in Phase Fluctuating Superconductors
نویسندگان
چکیده
منابع مشابه
The correlation between the Nernst effect and fluctuation diamagnetism in strongly fluctuating superconductors
We study theNernst effect influctuating superconductors by calculating the transport coefficient xy a in a phenomenologicalmodel where the relative importance of phase and amplitude fluctuations of the order parameter is tuned continuously to smoothly evolve from an effectiveXYmodel to themore conventional Ginzburg–Landau description. To connect with a concrete experimental realizationwe choose...
متن کاملGiant Nernst effect due to fluctuating cooper pairs in superconductors.
A theory of the fluctuation-induced Nernst effect is developed for a two-dimensional superconductor in a perpendicular magnetic field. First, we derive a simple phenomenological formula for the Nernst coefficient, which naturally explains the giant Nernst signal due to fluctuating Cooper pairs. The latter signal is shown to be large even far from the transition and may exceed by orders of magni...
متن کاملComment on "Giant Nernst effect due to fluctuating Cooper pairs in superconductors".
A comment is made on a letter (Phys. Rev. Lett. 102, 067001) and a paper (Phys. Rev. B 83, 020506) regarding the correct expression of the thermal current vertex for Cooper pairs. In the Ginzburg-Landau (GL) theory [1, 2] the electronic current ~ J and the thermal current ~ J carried by fluctuating Cooper pairs (T > Tc) are given as ~ J = 2e ~ J, (1) and ~ J = ω ~ J, (2) in the limit of vanishi...
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After a brief review of current ideas on stripe order in cuprate high-temperature superconductors, we discuss the quasiparticle Nernst effect in cuprates, with focus on its evolution in non-superconducting stripe and related nematic states. In general, we find the Nernst signal to be strongly enhanced by nearby van-Hove singularities and Lifshitz transitions in the band structure, implying that...
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– Linear diamagnetism is predicted in the vortex-liquid phase of layered superconductors at temperatures just below the mean-field phase transition on the basis of a hightemperature analysis of the corresponding frustrated XY model. The diamagnetic susceptibility, and the Nernst signal by implication, is found to vanish with temperature as (Tc0 − T ) 3 in the vicinity of the meanfield transitio...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2007
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.99.117004