Publisher’s Note: On the possibility of fast vortices in the cuprates: A vortex plasma model analysis of THz conductivity and diamagnetism in La2−xSrxCuO

L. S. Bilbro¹,

Rolando Valdés Aguilar²,

Г. Логвенов³

et al.

Synthesis, characterization, Hall effect and THz conductivity of epitaxial thin films of Fe chalcogenide superconductors

“…However, this does not mean that the superfluid remains finite far above Tc. Indeed, in the real part around Tc, there is no pronounced peak, which is definitely different from the case of cuprate superconductors [24,35,36]. This means that the superconductivity fluctuation of Fe(Se,Te) is not so prominent as was in cuprates.…”

Berezinskii-Kosterlitz-Thouless Transition to the Superconducting State of Heavy-Fermion Superlattices

“…While well established for superfluid films, BKT transition is less convincing for superconductors (See [4] and references therein). Though implications have been found in numerous thin superconducting films [4][5][6][7][8][9][10], highly anisotropic cuprates [11][12][13][14], oxide interfaces [15][16][17], the results have remained inconclusive (see e.g. [18,19]).…”

Current-current Fermi-liquid corrections to the superconducting fluctuations on conductivity and diamagnetism

“…Regardless of the KT or GL character of fluctuations, there are two outcomes of the experiments that are not expected for conventional superconductors: (i) the range of temperatures where the fluctuation conductivity is observed does not always match the one where a sizeable Nernst signal has been reported 7,8 , and (ii) the SCF contribution to the conductivity is about two orders of magnitude smaller than the fluctuating diamagnetism in the same system, as recently pointed out by Bilbro et al in Ref. 13. To be more precise, we recall that in 2D the contribution of SCF to the conductivity δσ and diamagnetism δχ d can be expressed both within the GL 9 and KT 14 theory in terms of the superconducting correlation length ξ(T ) as:…”

“…where ξ σ , ξ χ d are the correlations length extracted from paraconductivity and diamagnetism measurements, respectively. Since one would expect that the same lenght scale is involved in both cases, ξ 2 σ /ξ 2 χ d = 1, rigth above T c , δσ/δχ d should be of order ∼ 10 5 (Ω A/T) −1 , while experimentally it turns out to be two orders of magnitude smaller than this 1,13 (see also discussion below Eq. ( 36)).…”