Theory of asymmetric tunneling in the cuprate superconductors

P. W. Anderson; N. P. Ong

doi:10.1016/j.jpcs.2005.10.132

Theory of asymmetric tunneling in the cuprate superconductors

P. W. Anderson, N. P. Ong

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Abstract

We explain quantitatively, within the Gutzwiller-Resonating Valence Bond theory, the puzzling observation of tunneling conductivity between a metallic point and a cuprate high-T_c superconductor which is markedly asymmetric between positive and negative voltage biases. The asymmetric part does not have a 'coherence peak' but does show structure due to the gap. The fit to data is satisfactory within the over-simplifications of the theory; in particular, it explains the marked 'peak-dip-hump' structure observed on the hole side and a number of other qualitative observations. This asymmetry is strong evidence for the projective nature of the ground state and hence for 't-J' physics.

Original language	English (US)
Pages (from-to)	1-5
Number of pages	5
Journal	Journal of Physics and Chemistry of Solids
Volume	67
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jpcs.2005.10.132
State	Published - Jan 2006

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1016/j.jpcs.2005.10.132

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AB - We explain quantitatively, within the Gutzwiller-Resonating Valence Bond theory, the puzzling observation of tunneling conductivity between a metallic point and a cuprate high-Tc superconductor which is markedly asymmetric between positive and negative voltage biases. The asymmetric part does not have a 'coherence peak' but does show structure due to the gap. The fit to data is satisfactory within the over-simplifications of the theory; in particular, it explains the marked 'peak-dip-hump' structure observed on the hole side and a number of other qualitative observations. This asymmetry is strong evidence for the projective nature of the ground state and hence for 't-J' physics.

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Theory of asymmetric tunneling in the cuprate superconductors

Abstract

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