Quasiparticle Tunneling and Andreev Reflection Study of the Pseudogap in Underdoped La(2-x)Sr(x)CuO(4) and YBa(2)Cu(3)O(6+x)
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scanning tunneling point-contact spectroscopy pseu↗
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Spin-bag mechanism of high-temperature superconductivity
A new approach to the theory of high-temperature superconductivity is proposed, based on the two-dimensional antiferromagnetic spin correlations observed in these materials over distances large compared to the lattice spacing. The spin ordering produces an electronic pseudogap which is locally suppressed by the addition of a hole. This suppression forms a bag inside which the hole is self-consistently trapped. Two holes are attracted by sharing a common bag. The resulting pairing interaction leads to a superconducting energy gap which is nodeless over the Femri surface.
Schrieffer, J. R.↗