Possibility of a resonating-valence-bond state in the high-T/sub c/ superconductor Bi/sub 4/Ca/sub 3/Sr/sub 3/Cu/sub 4/O/sub 16+//sub x/

Journal Article · Sat Apr 01 00:00:00 EST 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.7313· OSTI ID:6151482

Chang, Y; Tang, M; Hwu, Y; Onellion, M; Huber, D L; Margaritondo, G; Morris, P A; Bonner, W A; Tarascon, J M; Stoffel, N G; others, and

We compared the photoemission edge line shape of Bi/sub 4/Ca/sub 3/Sr/sub 3/Cu/sub 4/O/sub 16+//sub x/ with those of the Au and Al Fermi edges. Specifically, we searched for the intensity decrease in the neighborhood of the Fermi level, predicted in the case of photoemission from a resonating-valence-bond (RVB) state. We found no positive evidence for this decrease and we estimated that, if the RVB state exists, then the upper limit for the maximum spinon energy is 65 meV. Our data analysis also indicates that the mere observation of an apparent spectral edge is not sufficient per se to rule out a RVB state.

• Research Organization: Department of Physics and Synchrotron Radiation Center, University of Wisconsin, Madison, Wisconsin 53706
• OSTI ID: 6151482
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 39:10
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH OXIDES
ELECTRONIC STRUCTURE
PHOTOEMISSION
CALCIUM OXIDES
COPPER OXIDES
STRONTIUM OXIDES
FERMI LEVEL
SUPERCONDUCTORS
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
EMISSION
ENERGY LEVELS
OXIDES
OXYGEN COMPOUNDS
SECONDARY EMISSION
STRONTIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
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656100 - Condensed Matter Physics- Superconductivity