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Destroying Coherence in High-Temperature Superconductors with Current Flow

TitleDestroying Coherence in High-Temperature Superconductors with Current Flow
Publication TypeJournal Article
Year of Publication2016
AuthorsKaminski, A, Rosenkranz, S, Norman, MR, Randeria, M, Li, ZZ, Raffy, H, Campuzano, JC
JournalPhysical Review X
Date Published09
Type of ArticleArticle
ISBN Number2160-3308
Accession NumberWOS:000383168600002
Keywordsbi2sr2cacu2o8+delta, crystals, density, excitation, fermi-surface, films, normal-state, photoemission, physics

The loss of single-particle coherence going from the superconducting state to the normal state in underdoped cuprates is a dramatic effect that has yet to be understood. Here, we address this issue by performing angle resolved photoemission spectroscopy measurements in the presence of a transport current. We find that the loss of coherence is associated with the development of an onset in the resistance, in that well before the midpoint of the transition is reached, the sharp peaks in the angle resolved photoemission spectra are completely suppressed. Since the resistance onset is a signature of phase fluctuations, this implies that the loss of single-particle coherence is connected with the loss of long-range phase coherence.

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Alternate JournalPhys. Rev. X