ARPES studies of the superconducting gap in high temperature superconductors

Conference · Mon Dec 30 23:00:00 EST 1996

OSTI ID:549844

Ding, H ^[1]; Norman, M R ^[1]; Giapintzakis, J ^[2]

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1. Argonne National Lab., IL (United States). Materials Science Div.
2. Univ. of Illinois, Urbana, IL (United States). Dept. of Physics; and others

Using high resolution angle-resolved photoemission spectroscopy (ARPES), the authors measure the superconducting gap and its momentum dependence in the high temperature superconductors Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} (Bi2212) and YBa{sub 2}Cu{sub 3}O{sub 6.95} (Y123). It is found that umklapp bands due to the incommensurate superlattice in Bi2212 may obscure the intrinsic momentum dependence of the gap. By taking these into consideration, they find a d-wave-like gap function in Bi2212. They also report an unambiguous observation of the superconducting gap in Y123.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• Sponsoring Organization: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 549844
• Report Number(s): CONF-960163--; ISBN 0-8194-2070-0
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
D WAVES
ENERGY GAP
HIGH-TC SUPERCONDUCTORS
PHOTOELECTRON SPECTROSCOPY
STRONTIUM OXIDES
SUPERCONDUCTIVITY
YTTRIUM OXIDES