Fermi-liquid behavior in an underdoped high-Tc superconductor

Suchitra E. Sebastian; N. Harrison; M. M. Altarawneh; Ruixing Liang; D. A. Bonn; W. N. Hardy; G. G. Lonzarich

doi:10.1103/PhysRevB.81.140505

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Fermi-liquid behavior in an underdoped high-Tc superconductor

Suchitra E. Sebastian, N. Harrison, M. M. Altarawneh, Ruixing Liang, D. A. Bonn, W. N. Hardy, G. G. Lonzarich

DOI 10.1103/PhysRevB.81.140505 · Physical Review B

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Abstract

We use magnetic quantum oscillations in the underdoped high Tc superconductor YBa2Cu3O6+x (x≈0.56) measured over a broad range of temperatures 100 mK<T<18 K to extract the form of the distribution function describing the low-lying quasiparticle excitations in high magnetic fields. Despite the proximity of YBa2Cu3O6.56 to a Mott insulating state, various broken symmetry ground states and/or states with different quasiparticle statistics, we find that our experimental results can be understood in terms of quasiparticle excitations obeying Fermi-Dirac statistics as in the Landau-Fermi liquid theory.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O6+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O6.56 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown