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Influence of disorder on the local density of states in high- T(c) superconducting thin films | | T Cren
; D Roditchev
; W Sacks
; J Klein
; J Moussy
; C Deville-Cavellin
; M Lagues
; | | Date: |
3 Jan 2000 | | Journal: | Phys Rev Lett, 84 (1), 147-50 | | Abstract: | Using a low temperature scanning tunneling microscope in the spectroscopic mode, we find that the disorder in a Bi(2)Sr(2)CaCu(2)O(8+delta) thin film modifies dramatically the quasiparticle local density of states. Small, but well-defined superconducting regions, coexisting with dominating semiconducting areas, show well-pronounced gap structures, similar to those observed previously in high-quality single crystals. Surprisingly, between these two regions, the detailed shape of the quasiparticle spectrum is virtually identical to the pseudogap previously observed at temperatures T>T(c), or in the vortex core, at 4.2 K. Thus, the role of the disorder in destroying the superconducting phase is comparable to that of the magnetic field or thermal fluctuations. | | Source: | PubMed, pmid11015856 | | Services: | Forum | Review | Favorites | |
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