The ratio 2?0/T c in BCS superconductivity

Udomsamuthirun, P.; Ratanaburi, S.; Saentalard, N.; Yoksan, S.

doi:10.1007/bf00728241

Cited by 11 publications

(8 citation statements)

References 4 publications

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“…allows one to derive curves of the energy gap for various values of introduced parameters. Some new values of the characteristic ratios (like 2D 0 aT c ) in BCS superconductivity [8] are also obtained.…”

Section: Introductionmentioning

confidence: 72%

“…The inclusion of D-wave pairing interaction [1], adding a new term of interaction to the BCS Hamiltonian [2 to 5], studying an energy-varying electronic density of states or band-filling within Eliashberg theory [6,7] as well as a singular density of states or van Hove singularity for BCS superconductivity [8,9] are approaches of this type.…”

Section: Introductionmentioning

confidence: 99%

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Interplay between the Energy Gap and Heat Capacity in S-Wave Superconductor

Gonczarek

Mulak

1998

phys. stat. sol. (b)

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Starting from the postulated, generalized form of the BCS gap equation, suitable for a wide class of microscopic models, the thermodynamic properties of S-wave superconductors are studied. The precise analytical formulas for the main thermodynamic quantities are given and discussed in the characteristic temperature limits. In particular the inversion of the equations defining the specific heat as a function of DT, i.e. the temperature dependence of the energy gap in S-wave superconductor is presented. It makes possible a reconstruction of the energy gap as a function of temperature from the heat capacity data. As predicted, in the frame of the model, the other thermodynamic quantities from the DT function seem also to be interesting.

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Section: Introductionmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Interplay between the Energy Gap and Heat Capacity in S-Wave Superconductor

Gonczarek

Mulak

1998

phys. stat. sol. (b)

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“…To investigate the effect of hybridization and the Debye cutoff on gap-to-ratio, we rewrite the gap equation at critical temperature and at zero-temperature into the form [29]…”

Section: Casementioning

confidence: 99%

The Study on Hybridized Two-Band Superconductor

Chanpoom

Seechumsang

Chantrapakajee

et al. 2013

Advances in Condensed Matter Physics

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The two-band hybridized superconductor which the pairing occurred by conduction electron band and other-electron band are considered within a mean-field approximation. The critical temperature, zero-temperature order parameter, gap-to-Tcratio, and isotope effect coefficient are derived. We find that the hybridization coefficient shows a little effect on the superconductor that conduction electron band has the same energy as other-electron band but shows more effect on the superconductor that conduction electron band coexists with lower-energy other-electron band. The critical temperature is decreased as the hybridization coefficient increases. The higher value of hybridization coefficient, lower value of gap-to-Tcratio, and higher value of isotope effect coefficient are found.

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“…For more accuracy, the same process as Ref. [12,13] is used to find D(T) within the determined parameters D(0), T c and x D . The temperature dependence energy gap can get from the equation…”

Section: Model and Calculationsmentioning

confidence: 99%

Effect of impurities scattering potential on NMR relaxation rate in impure d-wave superconductors

Udomsamuthirun

Meemon

2009

Physica C: Superconductivity

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a b s t r a c tThe purpose of our research is to study the nuclear spin lattice relaxation rate of impure d-wave superconductors. We use the Green's function method to derive the approximation equation of density of states including the impurity scattering potential. We can get the analytic equation of the nuclear spin lattice relaxation rate that contained the impurity scattering potential in case of weak scattering potential and strong scattering potential in the simple form as the power series of D(T) and T. The numerical calculations show that there is coherence peak in the weak impurity scattering potential but there is no peak in the strong impurity scattering potential.Crown

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The ratio 2?0/T c in BCS superconductivity

Cited by 11 publications

References 4 publications

Interplay between the Energy Gap and Heat Capacity in S-Wave Superconductor

Interplay between the Energy Gap and Heat Capacity in S-Wave Superconductor

The Study on Hybridized Two-Band Superconductor

Effect of impurities scattering potential on NMR relaxation rate in impure d-wave superconductors

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