Is the Onset of High-Temperature Superconductivity Associated with a Dimensional Crossover?

A. Menzel; R. Beer; E. Bertel

doi:10.1103/PhysRevLett.89.076803

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Is the Onset of High-Temperature Superconductivity Associated with a Dimensional Crossover?

A. Menzel, R. Beer, E. Bertel

DOI 10.1103/PhysRevLett.89.076803 · Physical Review Letters

T1

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Abstract

Angle-resolved ultraviolet photoemission spectroscopy (ARUPS) from high-Tc superconductors shows an effective-mass renormalization and intense quasiparticle peaks close to the Fermi energy EF, which change dramatically with temperature as Tc is crossed. They are attributed to many-body effects, but their precise nature has been controversial until now. We find very similar spectral fingerprints, even with a similar temperature dependence albeit with much higher critical temperature, in a quasi-one-dimensional Br/Pt surface compound. The striking parallels support an interpretation based on spin-charge separation and are consistent with a dimensional crossover taking place at Tc.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown