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Spectroscopic evidence for preformed Cooper pairs in the pseudogap phase of cuprates
- Shi, M. (author)
- Bendounan, A. (author)
- Razzoli, E. (author)
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- Rosenkranz, S. (author)
- Norman, M. R. (author)
- Campuzano, J. C. (author)
- Chang, J. (author)
- Sassa, Y. (author)
- Patthey, L. (author)
- Momono, N. (author)
- Oda, M. (author)
- Ido, M. (author)
- Guerrero, S. (author)
- Mudry, C. (author)
- Mesot, J. (author)
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- (creator_code:org_t)
- 2009-11-10
- 2009
- English.
- In: Europhysics letters. - : IOP Publishing. - 0295-5075 .- 1286-4854. ; 88:2
- Journal article (peer-reviewed)
Abstract
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- Angle-resolved photoemission on underdoped La1.895Sr0.105CuO4 reveals that in the pseudogap phase, the dispersion has two branches located above and below the Fermi level with a minimum at the Fermi momentum. This is characteristic of the Bogoliubov dispersion in the superconducting state. We also observe that the superconducting and pseudogaps have the same d-wave form with the same amplitude. Our observations provide direct evidence for preformed Cooper pairs, implying that the pseudogap phase is a precursor to superconductivity.
Keyword
- high-t-c
- underdoped bi2212
- normal-state
- superconductors
- gap
- bi2sr2cacu2o8+delta
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Shi, M.
- Bendounan, A.
- Razzoli, E.
- Rosenkranz, S.
- Norman, M. R.
- Campuzano, J. C.
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- Chang, J.
- Månsson, Martin
- Sassa, Y.
- Claesson, Tomas
- Tjernberg, Oscar
- Patthey, L.
- Momono, N.
- Oda, M.
- Ido, M.
- Guerrero, S.
- Mudry, C.
- Mesot, J.
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- Europhysics lett ...
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- Royal Institute of Technology
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