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Possible high-Tc superconductivity in thin wires

Y. C. Lee, B. S. Mendoza

DOI 10.1103/PhysRevB.39.4776 · Physical Review B

T1

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Abstract

A heuristic approach to the theory of superconductivity based on a simple physical picture and capable of treating the simultaneous participation of multiple bosonic modes that mediate the pairing interaction is first developed. The effect of the bosonic mode damping is also accounted for. We then propose a possible mechanism of superconductivity in slender electronic systems of finite cross sections based on the pairing interaction mediated by the multiple modes of acoustic plasmons in these structures. Such modes include the quasi-one-dimensional plasmon as well as the so-called slender acoustic plasmons. The critical temperature and the energy gap/Tc ratio are then calculated by the heuristic method just developed. Numerical results on Tc in various samples are presented, showing Tc in the 150–200 K range. The ratio 2Δ0/Tc differs generally from the BCS value due to the temperature dependence of the mode damping. The associated coherence length is shown to be considerably smaller than the transverse dimension of the wires.

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FormulaReported Tc (K)Pressure (GPa)Type
InSb

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200Pressure not reportedunknown

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