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arXiv 1606.06018cond-mat.supr-con
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具有内势垒的超导纳米薄膜的多能隙超导性和相互作用驱动共振

Multigap superconductivity and interaction driven resonances in superconducting nanofilms with an inner potential barrier

Mauro M. Doria, Marco Cariglia, Andrea Perali

摘要:

研究了零温超导纳米薄膜中由单层到双层超导平板的过渡,过渡是由中间的可调绝缘势垒引起的。这种异质结构的单相超导基态被证明是本质上多能隙的,并具有由势垒的强度引起的新型共振,从而不同于由调节膜的厚度引起的Spanpson-Blatt形状共振。单粒子电子态根据其相对于绝缘势垒的奇偶性(偶或奇)受到强烈或微弱的影响。在有限的势垒强度的宇称简并的电梯重新配置的配对相互作用,并导致一个多能隙的超导态与相互作用驱动的共振。

英文摘要:

We study the crossover in a zero temperature superconducting nanofilm from a single to a double superconducting slab induced by a tunable insulating potential barrier in the middle. The single phase superconducting ground state of this heterostructure is shown to be intrinsically multigapped and to have a new type of resonance caused by the strength of the barrier, thus distinct from the Thompson-Blatt shape resonance which is caused by tuning the thickness of the film. Single particle electronic states are strongly or weakly affected according to their parity (even or odd) with respect to the insulating barrier. The lift of the parity degeneracy at finite barrier strength reconfigures the pairing interaction and leads to a multigapped superconducting state with interaction driven resonances.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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