Correction to: Superconducting Properties of LaSn3 Under Positive Hydrostatic Pressure

Singh, Surinder; Kumar, Ranjan

doi:10.1007/s10948-019-05212-7

Cited by 3 publications

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“…The above reported increase in the average electron-phonon coupling constant with an increase in positive hydrostatic pressure is not in tune with previously reported similar results for LaSn 3 & YIn 3 [28,29] In the previously reported similar results [28,29] both superconducting transition temperatures and electron-phonon coupling constant decreased with increase in positive hydrostatic pressure. But here we report that superconducting transition temperatures decreases and electron-phonon coupling constant increases with an increase in applied positive hydrostatic pressure.…”

Section: Effect Of Hydrostatic Pressure On La 3 Incontrasting

confidence: 67%

“…In the previously reported results [28,29] there was no change in α 2 F(ω)/F(ω) or α 2 plots with the application of positive hydrostatic pressure but the above result shows that there is a rise in the coupling strength with an increase in positive hydrostatic pressure. The hump in the ambient pressure plot rises towards a higher value or increases in amplitude with the application of positive hydrostatic pressure.…”

Section: Effect Of Hydrostatic Pressure On La 3 Inmentioning

confidence: 40%

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Electron-phonon coupling in La₃In under pressure

Singh

Pinsook

2023

J. Phys.: Condens. Matter

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Conventional superconducting parameters Eliashberg spectral function, phonon DOS, average electron-phonon coupling constant & superconducting transition temperature of La3In were calculated at ambient and applied positive hydrostatic pressure. Ambient pressure electron-phonon coupling constant was found to be 1.43 and superconducting transition temperature was calculated to be 8.7 K which is close to the experimental reported value of 9.5 K. Logarithmic average phonon frequency at ambient pressure was found to be 6.21×10-3 eV. Phonon dispersion relations for the ambient and applied positive hydrostatic pressure were calculated to confirm the dynamical stability of La3In under positive pressure. Acoustic modes of vibrations were found to mediate most of the electron-phonon-electron interaction with a very small contribution from optical modes of vibrations. Fermi surface at ambient pressure was also calculated and employed in explaining the large value of the calculated electron-phonon coupling constant. The effect of spin-orbit coupling (SOC) on electronic, phonon and superconducting properties of La3In was also studied.

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Section: Effect Of Hydrostatic Pressure On La 3 Incontrasting

confidence: 67%

Section: Effect Of Hydrostatic Pressure On La 3 Inmentioning

confidence: 40%

Electron-phonon coupling in La₃In under pressure

Singh

Pinsook

2023

J. Phys.: Condens. Matter

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“…All the computations were done using μ * = 0.28 The character of variation i.e. decrease in the value of both T c and λ ep with pressure is consistent with the similar published results for YIn 3 & LaSn 3 [18,19]. However, the same is not true for the similar published results for La 3 In [20] where T c decreases but λ ep increases with pressure.…”

Section: Resultssupporting

confidence: 79%

Effect of pressure on superconductivity of LaBi₃

Singh,

Pinsook

2023

Phys. Scr.

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The electronic properties, phonon properties, and conventional superconducting properties of the newly synthesized AuCu3-type intermetallic compound LaBi3 using first-principle density functional methods have been reported in this research article. Variations in conventional superconducting properties like transition temperature, electron-phonon coupling constant, Eliashberg spectral function, and average logarithmic phonon frequency with applied hydrostatic pressure have been reported in this research article. At ambient pressure, the transition temperature and coupling constant was computed to be 7.2 K and 2.78 respectively. The calculated decrease in transition temperature with applied pressure as reported in this article agrees with the previously reported experimental results. Ambient pressure Fermi surface was employed to explain the high electron-phonon coupling constant. 

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Machine learning of superconducting critical temperature from Eliashberg theory

et al. 2022

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The Eliashberg theory of superconductivity accounts for the fundamental physics of conventional superconductors, including the retardation of the interaction and the Coulomb pseudopotential, to predict the critical temperature Tc. McMillan, Allen, and Dynes derived approximate closed-form expressions for the critical temperature within this theory, which depends on the electron–phonon spectral function α2F(ω). Here we show that modern machine-learning techniques can substantially improve these formulae, accounting for more general shapes of the α2F function. Using symbolic regression and the SISSO framework, together with a database of artificially generated α2F functions and numerical solutions of the Eliashberg equations, we derive a formula for Tc that performs as well as Allen–Dynes for low-Tc superconductors and substantially better for higher-Tc ones. This corrects the systematic underestimation of Tc while reproducing the physical constraints originally outlined by Allen and Dynes. This equation should replace the Allen–Dynes formula for the prediction of higher-temperature superconductors.

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Correction to: Superconducting Properties of LaSn3 Under Positive Hydrostatic Pressure

Abstract: Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Cited by 3 publications

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Electron-phonon coupling in La₃In under pressure

Electron-phonon coupling in La₃In under pressure

Effect of pressure on superconductivity of LaBi₃

Machine learning of superconducting critical temperature from Eliashberg theory

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Correction to: Superconducting Properties of LaSn3 Under Positive Hydrostatic Pressure

Abstract: Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Cited by 3 publications

References 0 publications

Electron-phonon coupling in La3In under pressure

Electron-phonon coupling in La3In under pressure

Effect of pressure on superconductivity of LaBi3

Machine learning of superconducting critical temperature from Eliashberg theory

Contact Info

Product

Resources

About

Electron-phonon coupling in La₃In under pressure

Electron-phonon coupling in La₃In under pressure

Effect of pressure on superconductivity of LaBi₃