Doping dependence of fluctuation diamagnetism in high <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si9.gif" display="inline" overflow="scroll"><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mstyle mathvariant="normal"><mml:mi>c</mml:mi></mml:mstyle></mml:mrow></mml:msub></mml:math> superconductors

Sarkar, Kingshuk; Banerjee, Sumilan; Mukerjee, Subroto; Ramakrishnan, T. V.

doi:10.1016/j.aop.2015.11.003

Cited by 8 publications

(25 citation statements)

References 68 publications

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“…The correlation between xy a and T c can be seen in figure 5 where curves of constant xy a in the temperature and doping plane follow the superconducting dome for different values of the magnetic field. A similar correlation also exists between M and T c , which we have shown in an earlier work [19].…”

Section: Discussionsupporting

confidence: 88%

“…zero electric field and temperature gradient). The values obtained are in agreement with those from Monte Carlo simulations obtained in a previous study [19].…”

Section: Simulation Geometry and Methodologysupporting

confidence: 91%

“…This indicates that the equilibrium superconducting fluctuations responsible for the suppression of the superfluid stiffness also determine the thermoelectric response. A similar feature is also seen for the magnetization [19].…”

Section: Discussionsupporting

confidence: 79%

“…the fluctuation diamagnetism experimentally [26,27] and in theoretical calculations [19]. More significantly, the same feature has also been seen in experimental data for the Nernst coefficient [3].…”

Section: Resultssupporting

confidence: 74%

“…It has a Ginzburg-Landau form with parameters chosen to reproduce experimental observations for the cuprates. In particular, it has been employed to successfully reproduce experimental measurements of the specific heat, superfluid density, superconducting dome and fluctuation diamagnetism [17,19]. Coupling electrons to the pairing fluctuations produces Fermi arcs [18].…”

Section: The Free Energy Functionalmentioning

confidence: 99%

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The correlation between the Nernst effect and fluctuation diamagnetism in strongly fluctuating superconductors

et al. 2017

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We study the Nernst effect in fluctuating superconductors by calculating the transport coefficient xy a in a phenomenological model where the relative importance of phase and amplitude fluctuations of the order parameter is tuned continuously to smoothly evolve from an effective XY model to the more conventional Ginzburg-Landau description. To connect with a concrete experimental realization we choose the model parameters appropriate for cuprate superconductors and calculate xy a and the magnetization M over the entire range of experimentally accessible values of field, temperature and doping. We argue that xy a and M are both determined by the equilibrium properties of the superconducting fluctuations (and not their dynamics) despite the former being a transport quantity. Thus, the experimentally observed correlation between the Nernst signal and the magnetization arises primarily from the correlation between xy a and M. Further, there exists a dimensionless ratio T M xy a ( ) that quantifies this correlation. We calculate, for the first time, this ratio over the entire phase diagram of the cuprates and find it agrees with previous results obtained in specific parts of the phase diagram. We conclude that there appears to be no sharp distinction between the regimes dominated by phase fluctuations and Gaussian fluctuations for this ratio in contrast to xy a and M individually. The utility of this ratio is that it can be used to determine the extent to which superconducting fluctuations contribute to the Nernst effect in different parts of the phase diagram given the measured values of magnetization. J r J r J r J r J r J r , 4 S S S S J J r J r J J r J r

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Section: Discussionsupporting

confidence: 88%

“…zero electric field and temperature gradient). The values obtained are in agreement with those from Monte Carlo simulations obtained in a previous study [19].…”

Section: Simulation Geometry and Methodologysupporting

confidence: 91%

Section: Discussionsupporting

confidence: 79%

Section: Resultssupporting

confidence: 74%

Section: The Free Energy Functionalmentioning

confidence: 99%

See 3 more Smart Citations

The correlation between the Nernst effect and fluctuation diamagnetism in strongly fluctuating superconductors

et al. 2017

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Microscopic theory of novel pseudogap phenomena and Bose-liquid superconductivity and superfluidity in high-$$T_c$$ cuprates and other systems

Dzhumanov

2023

Pramana - J Phys

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High temperature superconductivity in the cuprates: Materials, phenomena and a mechanism

Banerjee¹,

Dasgupta²,

Mukerjee³

et al. 2018

AIP Conference Proceedings

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Superconductivity in the cuprates, discovered in the late 1980s and occurring at unprecedentedly high temperatures (up to about 140K) in about thirty chemically distinct families, continues to be a major problem in physics. In this article, after a brief introduction of these square planar materials with weak interlayer coupling, we mention some of the salient electronic properties of hole doped cuprates such as the pseudogap phase and the Fermi arc . We then outline a phenomenological, Ginzburg Landau like theory developed by some of us for the emergent d-wave symmetry superconductivity in these materials, and confronted successfully with a large amount of experimental information. A more recent application of the approach to fluctuation diamagnetism and to the anomalously large Nernst effect is also discussed.

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Doping dependence of fluctuation diamagnetism in high Tc superconductors

Cited by 8 publications

References 68 publications

The correlation between the Nernst effect and fluctuation diamagnetism in strongly fluctuating superconductors

The correlation between the Nernst effect and fluctuation diamagnetism in strongly fluctuating superconductors

Microscopic theory of novel pseudogap phenomena and Bose-liquid superconductivity and superfluidity in high-$$T_c$$ cuprates and other systems

High temperature superconductivity in the cuprates: Materials, phenomena and a mechanism

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