The phase diagram and the spin gap state in cuprates: Gauge theory
Conference
·
OSTI ID:68448
- Massachusetts Institute of Technology, Cambridge, MA (United States)
The author analyzes the phase diagram of single and bi-layer cuprates using the gauge-field description of the t-J model. For T > T{sub BE} the in-plane fermion-pairing order parameter {Delta}{sub {parallel}} is eliminated by gauge field fluctuations, leading to the prediction of the absence of a spin-gap phase in single-layer cuprates. For bi-layer cuprates the interlayer order parameter {Delta}{sub {perpendicular}} is enhanced by spin correlations, and is less affected by gauge fluctuations. The author believes that the spin gap in bi-layer materials is due to interlayer fermion pairing, and that for these underdoped samples the superconducting gap may be nodeless.
- Research Organization:
- Los Alamos National Lab., NM (United States)
- OSTI ID:
- 68448
- Report Number(s):
- LA-UR--94-1148; CONF-931247--; ON: DE94009293; CNN: Grant DMR-90-22933
- Country of Publication:
- United States
- Language:
- English
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