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Feshbach shape resonance for high T_c superconductivity in superlattices of nanotubes

机译:Feshbach形状共振在纳米管超晶格中具有高T_c超导性

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摘要

The case of a Feshbach shape resonance in the pairing mechanism for high T_c superconductivity in a crystalline lattice of doped metallic nanotubes is described. The superlattice of doped metallic nanotubes provides a superconductor with a strongly asymmetric gap. The disparity and different spatial locations of the wave functions of electrons in different subbands at the Fermi level should suppress the single electron impurity interband scattering giving multiband superconductivity in the clean limit. The Feshbach resonances will arise from the component single-particle wave functions out of which the electron pair wave function is constructed: pairs of wave functions which are time inverse of each other. The Feshbach shape resonance increases the critical temperature by tuning the chemical potential at the Lifshitz electronic topological transition (ETT) where the Fermi surface of one of the bands changes from the one dimensional (1D) to the two dimensional (2D) topology (1D/2D ETT).
机译:描述了在成对机制中的Feshbach形状共振的情况,以在掺杂的金属纳米管的晶格中实现高T_c超导。掺杂金属纳米管的超晶格为超导体提供了强烈的不对称间隙。在费米能级下,不同子带中电子的波函数的差异和不同的空间位置应抑制单个电子杂质带间散射,从而在干净的范围内提供多带超导性。 Feshbach共振将由构成单电子对波函数的单粒子波函数组成:成对的波函数彼此成反比。 Feshbach形状共振通过调整Lifshitz电子拓扑跃迁(ETT)处的化学势来提高临界温度,在该跃迁中,一个带的费米表面从一维(1D)变为二维(2D)拓扑(1D / 2D ETT)。

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