Linked Life Data

20867869

Source:http://linkedlifedata.com/resource/pubmed/id/20867869

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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2010-9-27
pubmed:abstractText
Using low photon energy angle-resolved photoemission, we study the low-energy dispersion along the nodal (?,?) direction in Bi{2}Sr{2}CaCu{2}O{8+?} as a function of temperature. Less than 10 meV below the Fermi energy, the high-resolution data reveal a novel "kinklike" feature in the electron self-energy that is distinct from the larger well-known kink roughly 70 meV below E{F}. This new kink is strongest below the superconducting critical temperature and weakens substantially at higher temperatures. A corollary of this finding is that the Fermi velocity v{F}, as measured in this low-energy range, varies rapidly with temperature-increasing by almost 30% from 70 to 110 K. The behavior of v{F}(T) appears to shift as a function of doping, suggesting a departure from simple "universality" in the nodal Fermi velocity of cuprates.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Jul
pubmed:issn
1079-7114
pubmed:author
pubmed:issnType
Electronic
pubmed:day
23
pubmed:volume
105
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
046402
pubmed:year
2010
pubmed:articleTitle
Low-energy (<10??meV) feature in the nodal electron self-energy and strong temperature dependence of the Fermi velocity in Bi{2}Sr{2}CaCu{2}O{8+?}.
pubmed:affiliation
Department of Physics, University of Colorado, Boulder, Colorado 80309-0390, USA. plumbnc@colorado.edu
pubmed:publicationType
Journal Article