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Local Density of States in a Dirty Normal Metal connected to a Superconductor | | W. Belzig
; C. Bruder
; Gerd Schoen
; | | Date: |
7 May 1996 | | Journal: | Phys. Rev. B 54 (1996) 9443 | | Subject: | cond-mat supr-con | | Affiliation: | University Karlsruhe, Germany | | Abstract: | A superconductor in contact with a normal metal not only induces superconducting correlations, known as proximity effect, but also modifies the density of states at some distance from the interface. These modifications can be resolved experimentally in microstructured systems. We, therefore, study the local density of states $N(E,x)$ of a superconductor - normal metal heterostructure. We find a suppression of $N(E,x)$ at small energies, which persists to large distances. If the normal metal forms a thin layer of thickness $L_n$, a minigap in the density of states appears which is of the order of the Thouless energy $sim hbar D/L_n^2$. A magnetic field suppresses the features. We find good agreement with recent experiments of Guéron {it et al.} | | Source: | arXiv, cond-mat/9605039 | | Other source: | [GID 1083123] pmid9984682 | | Services: | Forum | Review | PDF | Favorites | |
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