Interplay between the pseudogap and superconductivity in underdoped HgBa2CuO4+δ single crystals

Y. Gallais; A. Sacuto; T. P. Devereaux; D. Colson

doi:10.1103/PhysRevB.71.012506

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Interplay between the pseudogap and superconductivity in underdoped HgBa2CuO4+δ single crystals

Y. Gallais, A. Sacuto, T. P. Devereaux, D. Colson

DOI 10.1103/PhysRevB.71.012506 · Physical Review B

T1

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Abstract

We report a doping-dependent electronic Raman scattering (ERS) study of HgBa2CuO4+δ (Hg-1201) single crystals. We investigate the dynamics of the antinodal and nodal quasiparticles. We show that the dynamical response of the antinodal quasiparticles is strongly reduced towards the underdoped regime in both the normal and superconducting states. When probing the nodal quasiparticles, we are able to distinguish between the energy scale of the pseudogap and that of the superconducting gap. A simple model relating the suppression of the dynamical response of the antinodal quasiparticles to fluctuations related to a competing phase is proposed.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
HgBa2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	95	Pressure not reported	unknown
HgBa2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	78	Pressure not reported	unknown
HgBa2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	63	Pressure not reported	unknown