Formation of Gapless Fermi Arcs and Fingerprints of Order in the Pseudogap State of Cuprate Superconductors

TitleFormation of Gapless Fermi Arcs and Fingerprints of Order in the Pseudogap State of Cuprate Superconductors
Publication TypeJournal Article
Year of Publication2013
AuthorsKondo T, Palczewski AD, Hamaya Y, Takeuchi T, Wen JS, Xu ZJ, Gu G, Kaminski A
Journal TitlePhysical Review Letters
Volume111
Pages157003
Date Published10
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberWOS:000325372500009
Keywordsdensity, dynamics, high-t-c, origin, underdoped bi2sr2cacu2o8+delta
Abstract

We use angle-resolved photoemission spectroscopy and a new quantitative approach based on the partial density of states to study properties of seemingly disconnected portions of the Fermi surface (FS) that are present in the pseudogap state of cuprates called Fermi arcs. We find that the normal state FS collapses very abruptly into Fermi arcs at the pseudogap temperature (T*). Surprisingly, the length of the Fermi arcs remains constant over an extended temperature range between T* and T-pair, consistent with the presence of an ordered state below T*. These arcs collapse again at the temperature below which pair formation occurs (T-pair) either to a point or a very short arc, whose length is limited by our experimental resolution. The tips of the arcs span between points defining a set of wave vectors in momentum space, which are the fingerprints of the ordered state that causes the pseudogap.

URL<Go to ISI>://WOS:000325372500009
DOI10.1103/PhysRevLett.111.157003