Phonon squeezing in superconducting borocarbides

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

doi:10.1016/0921-4534(94)90069-8

Phonon squeezing in superconducting borocarbides

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

2 Citations (Scopus)

Abstract

The recently discovered superconductor LuNi₂B₂C is investigated in the context of strong electron-electron correlations modulated by a squeezed phonon mode propagating in the perpendicular direction to the layers with longitudinal polarization. The squeezed phonons arise in the anharmonic lattice expansion since the linear electron-phonon interaction vanishes due to the structure of the NiB₄ tetrahedra. The observed weak isotope effect and small dependence of T_c on pressure is qualitatively understood within the framework of this model.

Original language	English
Pages (from-to)	167-172
Number of pages	6
Journal	Physica C: Superconductivity and its Applications
Volume	234
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(94)90069-8
Publication status	Published - 1 Dec 1994
Externally published	Yes

Funding

This work and VI were supported by the Ministry of Education, Science and Culture of Japan, especially by the “New Program”.

Funders	Funder number
Ministry of Education, Culture, Sports, Science and Technology

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abstract = "The recently discovered superconductor LuNi2B2C is investigated in the context of strong electron-electron correlations modulated by a squeezed phonon mode propagating in the perpendicular direction to the layers with longitudinal polarization. The squeezed phonons arise in the anharmonic lattice expansion since the linear electron-phonon interaction vanishes due to the structure of the NiB4 tetrahedra. The observed weak isotope effect and small dependence of Tc on pressure is qualitatively understood within the framework of this model.",

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AB - The recently discovered superconductor LuNi2B2C is investigated in the context of strong electron-electron correlations modulated by a squeezed phonon mode propagating in the perpendicular direction to the layers with longitudinal polarization. The squeezed phonons arise in the anharmonic lattice expansion since the linear electron-phonon interaction vanishes due to the structure of the NiB4 tetrahedra. The observed weak isotope effect and small dependence of Tc on pressure is qualitatively understood within the framework of this model.

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Phonon squeezing in superconducting borocarbides

Abstract

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