Protected nodes and the collapse of Fermi arcs in high-T{sup c} cuprate superconductors.

Journal Article · Fri Oct 12 00:00:00 EDT 2007 · Phys. Rev. Lett.

DOI:https://doi.org/10.1103/PhysRevLett.99.157001· OSTI ID:919733

Kanigel, A; Chatterjee, U; Randeria, M; Norman, M R; Souma, S; Shi, M; Li, Z Z; Raffy, H; Campuzano, J C; Source, Swiss Light

Angle resolved photoemission on underdoped Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} reveals that the magnitude and d-wave anisotropy of the superconducting state energy gap are independent of temperature all the way up to T{sub c}. This lack of T variation of the entire k-dependent gap is in marked contrast to mean field theory. At T{sub c} the point nodes of the d-wave gap abruptly expand into finite length 'Fermi arcs.' This change occurs within the width of the resistive transition, and thus the Fermi arcs are not simply thermally broadened nodes but rather a unique signature of the pseudogap phase.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC; NSF
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 919733
• Report Number(s): ANL/MSD/JA-60530
• Journal Information: Phys. Rev. Lett., Journal Name: Phys. Rev. Lett. Journal Issue: Oct. 12, 2007 Vol. 99; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
BISMUTH OXIDES
CALCIUM OXIDES
CUPRATES
ENERGY GAP
FERMI LEVEL
HIGH-TC SUPERCONDUCTORS
MEAN-FIELD THEORY
PHOTOEMISSION
STRONTIUM OXIDES
TRANSITION TEMPERATURE