Journal ArticleDOI
Thermal conductivity of Zn, Pr and Tb doped YBCO single crystals: Theory and experiment
TLDR
In this article, the thermal conductivity of (Y,Pr)Ba2Cu3O7, YBa2(Cu,Zn) 3O7 and YBCO 7 single crystals from 10≥T≤280K was measured and a strong enhancement in K(T) was observed for T≈Tc/2 with a peak in K at approximately T ≥Tc 2 with a sharp change in slope of K at Tc.Abstract:
The thermal conductivity K(T) vs temperature has been measured for (Y,Pr)Ba2Cu3O7, (Y,Tb)Ba2Cu3O7 and YBa2(Cu,Zn)3O7 single crystals from 10≤T≤280K. For YBa2Cu3O7(YBCO), a strong enhancement in K(T) is observed for T≤Tcwith a peak in K(T) at approximately T≈Tc/2 with a sharp change in slope of K(T) at Tc. These results are similar to those reported previously. For the selectively doped YBCO, the peak in K(T) is shifted to lower temperatures and occurs at T≈ 20K independent of Tc and the impurity concentration. In addition, the sharp change in slope of K(T) at Tc is not apparent for the doped crystals. These results are discussed along with a theoretical model for electronic conduction including both impurity and inelastic scattering from spin fluctuations.read more
Citations
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Thermal conductivity of unconventional superconductors: a probe of the order parameter symmetry
Marcel Ausloos,Michel Houssa +1 more
TL;DR: In this paper, the analysis of experimental results in YBa2Cu3O7- and Bi2Sr2CaCu2O8 samples is reviewed in the very low-temperature region in order to sort out features and convincing arguments for deciding on the order parameter symmetry.
Journal ArticleDOI
Thermal conductivity and thermoelectric power of high-quality YBa2Cu3O7−δ crystals
TL;DR: The thermal conductivity of a twinned YBa 2 Cu 3 O 7− δ (Y123) crystal having an oxygen content of 6.95±0.02 was investigated in this article.
Journal ArticleDOI
Thermal transport in polycrystalline YBa2Cu3O7−δ, Y2BaCuO5 and melt-processed YBa2Cu3O7−δ materials
TL;DR: In this paper, simultaneous thermal conductivity and thermoelectric power measurements are reported for standard polycrystalline YBa2Cu3O7−δ (Y123) samples with oxygen contents covering the range 6.00 to 6.96±0.02, between 20-300 K.
Journal ArticleDOI
Thermal conductivity of a melt processed (Nd/Y)BCO intergrowth crystal below Tc
TL;DR: In this article, longitudinal and transverse thermal Hall conductivity measurements are reported for the ab plane of a slightly underdoped (oxygen content 6.92±0.02) melt processed (Nd/Y) intergrowth crystal below Tc.
Journal ArticleDOI
Role of Various Scattering Processes on Thermal Conductivity of Zn-Doped YBa2Cu3O7−δ Superconductor
Akanksha Parmar,M. K. Bera +1 more
TL;DR: In this article, the thermal conductivity of high temperature superconductor cuprates (Zn-doped yttrium barium copper oxide (YBCO), YBa2(Cu1−xZnx)3O7−δ) is successfully analyzed in the temperature range of 0 −200 K. The idea of relaxation time and various scattering mechanisms has been developed from frequency line widths using a quantum dynamical approach in this current formulation.
References
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Book
Physical properties of high temperature superconductors
TL;DR: In this paper, the authors describe the fundamental properties of high temperature superconductors in an organized and comprehensive manner, and provide a subject index for the user's convenience, which is a useful reference for research workers.
Journal ArticleDOI
Transport and Thermal Properties of Heavy-Fermion Superconductors: A Unified Picture
TL;DR: The transport and thermal properties of heavy-fermion superconductors are explained in terms of an anisotropic order parameter with a line or lines of nodes and an effective mean free path shown to arise in a consistent treatment of impurity scattering close to the unitarity limit.
Journal ArticleDOI
Thermal conductivity of an untwinned YBa 2 Cu 3 O 7 − δ single crystal and a new interpretation of the superconducting state thermal transport
TL;DR: It is proposed that strong suppression of the quasiparticle scattering rate with decreasing temperature is responsible for the large enhancement of the superconducting-state thermal conductivity.
Journal ArticleDOI
Resonant impurity scattering in heavy fermion superconductors
TL;DR: In this article, the effect of resonant impurity scattering on the properties of superconducting heavy fermion compounds was investigated within a self-consistent theory of pair-breaking.
Journal ArticleDOI
Theory of the Thermal Conductivity of Superconducting Alloys with Paramagnetic Impurities
Vinay Ambegaokar,Allan Griffin +1 more
TL;DR: In this article, the electronic thermal conductivity of a weakly coupled, isotropic superconductor doped with a small concentration of paramagnetic impurities is computed by considering the electron-impurity interaction in the ladder approximation.