Phonon squeezing via correlations in the superconducting electron-phonon interaction

T. Hakioglu; V. A. Ivanov; A. S. Shumovsky; B. Tanatar

doi:10.1103/PhysRevB.51.15363

Phonon squeezing via correlations in the superconducting electron-phonon interaction

T. Hakioglu^*, V. A. Ivanov, A. S. Shumovsky, B. Tanatar

^*Corresponding author for this work

Bilkent University

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Superconductivity in the conventional BCS model with correlated squeezed phonons is discussed. It is shown that the energy gap and the critical temperature are maximally enhanced in an optimum and finite range of squeezed coupling. For finite-squeezed coupling the ratio 2Δ/Tc becomes coupling-constant dependent and increases beyond the BCS value of 3.53. Ion-mass dependence of the squeezed coupling constant can yield variations of the isotope exponent from its conventional BCS value of 0.5.

Original language	English
Pages (from-to)	15363-15368
Number of pages	6
Journal	Physical Review B
Volume	51
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.51.15363
Publication status	Published - 1995
Externally published	Yes

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title = "Phonon squeezing via correlations in the superconducting electron-phonon interaction",

abstract = "Superconductivity in the conventional BCS model with correlated squeezed phonons is discussed. It is shown that the energy gap and the critical temperature are maximally enhanced in an optimum and finite range of squeezed coupling. For finite-squeezed coupling the ratio 2Δ/Tc becomes coupling-constant dependent and increases beyond the BCS value of 3.53. Ion-mass dependence of the squeezed coupling constant can yield variations of the isotope exponent from its conventional BCS value of 0.5.",

author = "T. Hakioglu and Ivanov, {V. A.} and Shumovsky, {A. S.} and B. Tanatar",

year = "1995",

doi = "10.1103/PhysRevB.51.15363",

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AU - Hakioglu, T.

AU - Ivanov, V. A.

AU - Shumovsky, A. S.

AU - Tanatar, B.

PY - 1995

Y1 - 1995

N2 - Superconductivity in the conventional BCS model with correlated squeezed phonons is discussed. It is shown that the energy gap and the critical temperature are maximally enhanced in an optimum and finite range of squeezed coupling. For finite-squeezed coupling the ratio 2Δ/Tc becomes coupling-constant dependent and increases beyond the BCS value of 3.53. Ion-mass dependence of the squeezed coupling constant can yield variations of the isotope exponent from its conventional BCS value of 0.5.

AB - Superconductivity in the conventional BCS model with correlated squeezed phonons is discussed. It is shown that the energy gap and the critical temperature are maximally enhanced in an optimum and finite range of squeezed coupling. For finite-squeezed coupling the ratio 2Δ/Tc becomes coupling-constant dependent and increases beyond the BCS value of 3.53. Ion-mass dependence of the squeezed coupling constant can yield variations of the isotope exponent from its conventional BCS value of 0.5.

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U2 - 10.1103/PhysRevB.51.15363

DO - 10.1103/PhysRevB.51.15363

M3 - Article

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VL - 51

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EP - 15368

JO - Physical Review B

JF - Physical Review B

IS - 21

ER -

Phonon squeezing via correlations in the superconducting electron-phonon interaction

Abstract

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