Thermal conductivity of polycrystalline<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">YBa</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>8</mml:mn></mml

Williams, R. K.; Scarbrough, J. O.; Schmitz, J.; Thompson, James R.

doi:10.1103/physrevb.57.10923

Cited by 10 publications

(5 citation statements)

References 48 publications

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“…Electronic component of thermal conductivity in HT c superconductors was calculated with different models by some groups. Williams et al found that the electronic part of j(T) of YBCO was about 30% of the measured room-temperature j(T) value [47]. On the other study, Krishana et all found that the electronic j(T) at T > T c in optimally doped single-crystal Y-123 represented only 10% of the total j(T) [48].…”

Section: Thermal Conductivity Analysismentioning

confidence: 94%

Investigation of thermoelectric power with modification of two band model with linear T term for superconductors and thermal conductivity study of Se added YBCO samples

Altın

Aksan

Yakıncı

2014

Journal of Alloys and Compounds

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Section: Thermal Conductivity Analysismentioning

confidence: 94%

Investigation of thermoelectric power with modification of two band model with linear T term for superconductors and thermal conductivity study of Se added YBCO samples

Altın

Aksan

Yakıncı

2014

Journal of Alloys and Compounds

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“…There have been several studies investigating the temperature dependence of the lattice properties [1][2][3], optical properties [4,5] and, thermal properties [6][7][8][9][10][11][12][13] of YBa 2 Cu 3 O 7−x and YBCO/substrate boundary resistance [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Effects of the superconductivity transition on the response of YBCO edge transition bolometers

Bozbey

Fardmanesh

Askerzade

et al. 2003

Supercond. Sci. Technol.

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Dependence of the phase and magnitude of the response of Y-Ba-Cu-O edge transition bolometers on the superconducting transition is studied. The responses of both large and small area devices were investigated and several anomalies are observed. The response of small area LaAlO 3 devices considerably differed from that expected based on the dR/dT curve. This discrepancy is observed to be strongly dependent on the superconducting transition. Both the phase and magnitude/(dR/dT) of the response of the devices showed abrupt changes for below the T c-onset when measured versus temperature, while the phase variation also showed strong dependence on the modulation frequency. We present the analysis and propose mechanisms responsible for the modulation frequency dependence of the response characteristics versus temperature, within the superconductivity transition region of the devices.

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“…The resistivity increases as the doping decreases from the Fermi liquid into the pseudogap region. Moreover, the thermal conductivity κ, 51,52 the thermopower S 53,54 and the tunneling conductance g 55 have been investigated near the quantum critical point of the cuprates. κ is observed to be nearly independent of temperature in the marginal Fermi liquid state 56 and depends on 1/T in the Fermi liquid region.…”

mentioning

confidence: 99%

Role of the van Hove singularity in the quantum criticality of the Hubbard model

et al. 2011

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A quantum critical point is found in the phase diagram of the two-dimensional Hubbard model [Vidhyadhiraja et al., Phys. Rev. Lett. 102, 206407 (2009)]. It is due to the vanishing of the critical temperature associated with a phase separation transition, and it separates the non-Fermi liquid region from the Fermi liquid. Near the quantum critical point, the pairing is enhanced since the real part of the bare d-wave pairing susceptibility exhibits an algebraic divergence with decreasing temperature, replacing the logarithmic divergence found in a Fermi liquid [Yang et al., Phys. Rev. Lett. 106, 047004 (2011)]. In this paper we explore the single-particle and transport properties near the quantum critical point using high quality estimates of the self energy obtained by direct analytic continuation of the self energy from Continuous-Time Quantum Monte Carlo. We focus mainly on a van Hove singularity coming from the relatively flat dispersion that crosses the Fermi level near the quantum critical filling. The flat part of the dispersion orthogonal to the antinodal direction remains pinned near the Fermi level for a range of doping that increases when we include a negative next-near-neighbor hopping t ′ in the model. For comparison, we calculate the bare d-wave pairing susceptibility for non-interacting models with the usual two-dimensional tight binding dispersion and a hypothetical quartic dispersion. We find that neither model yields a van Hove singularity that completely describes the critical algebraic behavior of the bare d-wave pairing susceptibility found in the numerical data. The resistivity, thermal conductivity, thermopower, and the Wiedemann-Franz Law are examined in the Fermi liquid, marginal Fermi liquid, and pseudo-gap doping regions. A negative next-near-neighbor hopping t ′ increases the doping region with marginal Fermi liquid character. Both T and negative t ′ are relevant variables for the quantum critical point, and both the transport and the displacement of the van Hove singularity with filling suggest that they are qualitatively similar in their effect.

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Thermal conductivity of polycrystallineYBa2Cu4O8

Cited by 10 publications

References 48 publications

Investigation of thermoelectric power with modification of two band model with linear T term for superconductors and thermal conductivity study of Se added YBCO samples

Investigation of thermoelectric power with modification of two band model with linear T term for superconductors and thermal conductivity study of Se added YBCO samples

Effects of the superconductivity transition on the response of YBCO edge transition bolometers

Role of the van Hove singularity in the quantum criticality of the Hubbard model

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