The Investigation of an Anomalous Isotope Exponent of Superconductors Under High Pressure in Weak-Coupling Limit

Chanpoom, Thaipanya; Ruangrungrote, Siriluk; Udomsamuthirun, P.

doi:10.1007/s10909-022-02736-6

Cited by 4 publications

(3 citation statements)

References 26 publications

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“…Another possible consequence of exerting pressure on a hydride superconductor is the possible fluctuation of the density of states, resulting in the formation of a narrow peak in the density of states. This peak is seen to occur somewhat below the Fermi level [17,28,29]. In our suggested model, we also made the assumption that the fluctuation in carriers under pressure leads to a single narrow fluctuation constant in the density of states.…”

Section: Methodsmentioning

confidence: 97%

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The Study on the Critical Temperature and Gap-to-Tc Ratio of Yttrium Hydride Superconductors

Tongkhonburi,

Udomsamuthirun,

Changjan

et al. 2024

Crystals

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This study investigates the gap-to-Tc ratio (R) of yttrium hydride superconductors within the weak coupling limit. We derived an analytical formula for the gap-to-Tc ratio. The ratio of the gap-to-Tc is dependent on the pressure applied to each superconductor. The maximum ratio, approximately 3.85, is observed in one superconductor, while the lowest ratio, roughly 3.21, is found in another superconductor. Based on the findings of our study, it can be deduced that yttrium hydride superconductors exhibit attributes commonly associated with weak-coupling superconductors. The influence of the Coulomb potential is more pronounced at a critical temperature compared to the ratio of the gap to the critical temperature.

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Section: Methodsmentioning

confidence: 97%

“…Let V ph represent the attractive-phonon interaction and U c represent the Coulomb repulsion interaction, either of which possesses a characteristic cutoff energy associated with the Debye phonon (ω D ) and Coulomb (ω c ), respectively. Then, the interaction potential of carrier V kk is [26][27][28]…”

Section: Methodsmentioning

confidence: 99%

The Study on the Critical Temperature and Gap-to-Tc Ratio of Yttrium Hydride Superconductors

Tongkhonburi,

Udomsamuthirun,

Changjan

et al. 2024

Crystals

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“…and p is the external pressure exerted on unit cell, we use the external hydrostatic pressure equation as [9] ( ) (0)…”

Section: Model and Calculationmentioning

confidence: 99%

External pressure effects on superfluid density of isotropic s-wave superconductors

Chanilkul

Changjan²,

Nilkamjon

et al. 2023

J. Phys.: Conf. Ser.

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Through using BCS theory and the semi-classical approach, the effect of external pressure on the superfluid density of s-wave isotropic superconductors were explored. The pressure parameters as the energy dispersion relation and the height of the density of state were applied. The analytical formula of superfluid density under pressure were derived and the numerical calculation results were compared to the experimental results of H3S and LaH10 superconductors. We discovered that the superfluid density under pressure of H3S and LaH10 superconductors fit our results closely. As the height of the density of state increased, so did the superfluid density.

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Investigation of the effect of high pressure on the superfluid density of H3S, LaH10, and CaAlSi superconductors

Chanilkul

Changjan²,

Udomsamuthirun

2023

Physica C: Superconductivity and its Applications

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The Investigation of an Anomalous Isotope Exponent of Superconductors Under High Pressure in Weak-Coupling Limit

Cited by 4 publications

References 26 publications

The Study on the Critical Temperature and Gap-to-Tc Ratio of Yttrium Hydride Superconductors

The Study on the Critical Temperature and Gap-to-Tc Ratio of Yttrium Hydride Superconductors

External pressure effects on superfluid density of isotropic s-wave superconductors

Investigation of the effect of high pressure on the superfluid density of H3S, LaH10, and CaAlSi superconductors

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