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Article
Open AccessPairing in a dry Fermi sea
In the traditional Bardeen–Cooper–Schrieffer theory of superconductivity, the amplitude for the propagation of a pair of electrons with momentum k and −k has a log singularity as the temperature decreases. This s...
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Article
Open AccessEmergence of coherence in the charge-density wave state of 2H-NbSe2
A charge-density wave (CDW) state has a broken symmetry described by a complex order parameter with an amplitude and a phase. The conventional view, based on clean, weak-coupling systems, is that a finite ampl...
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Article
Effect of the pseudogap on the transition temperature in the cuprates and implications for its origin
An argument by contradiction shows that the pseudogap state in the high-temperature superconducting cuprates is due to the superconducting pairing rather than being an independent or even competing state.
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Article
Observation of a d-wave nodal liquid in highly underdoped Bi2Sr2CaCu2O8+δ
High-temperature superconductivity in the cuprates arises when charge carriers are added to an insulator. Between these states lies the so-called nodal liquid at low temperature. Photoemission spectroscopy sug...
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Article
Evolution of the pseudogap from Fermi arcs to the nodal liquid
The response of a material to external stimuli depends on its low-energy excitations. In conventional metals, these excitations are electrons on the Fermi surface—a contour in momentum (k) space that encloses all...
