Complementary Theories of Energy Gaps in HTSC

Details Complementary Theories of Energy Gaps in HTSC Complementary Theories of Energy Gaps in HTSC

2001-07-25

arxiv.org/abs/cond-mat/0107531v1

Physics

Condensed Matter

Superconductivity

23 pages, 7 figs, pdf

Scientific paper

We examine experiments on energy gaps in high temperature superconductors (HTSC) in terms of experimental probes that utilize momentum, position, or neither. Experiments on very high quality mechanical tunnel junctions show a sharp energy gap with a maximum anisotropy of ~ 10%, while ultrahigh precision ARPES experiments show 100% anisotropy (d-wave pairing). We resolve this conbflict by showing that the latter result is caused by the momentum-projective nature of ARPES and glassy orthorhombic dopant correlations. The latter appear to be a universal feature of the intermediate phase tha is responsible for HTSC. Apparent large inconsistencies between position-projective STM gap data and tunnel junction data on severely underdoped BSCCO are also resolved.

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