Phonon Signatures of a Quantum Impurity with Induced Electron Pairing
J. Barański and T. Domański
Institute of Physics, M. Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland
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We analyze the effective spectrum of a vibrating molecule coupled between one conducting and another superconducting electrode. The proximity effect induces electron pairing which is manifested by the subgap quasiparticle peaks (the Andreev states) whose broadening depends on a hybridization with the conducting electrode. On the other hand, the electron-phonon interaction leads to a multilevel structure with the polaronic states separated by the phonon energy. We inspect a combined effect of both these (polaronic and induced pairing) phenomena.

DOI: 10.12693/APhysPolA.126.A-73
PACS numbers: 73.63.Kv; 73.23.Hk; 74.45.+c; 74.50.+r; 63.22.-m