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arXiv · 0912.3022

Fermi liquid behaviour 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
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Abstract

We use magnetic quantum oscillations in the underdoped high Tc superconductor YBa_2Cu_3O_(6+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 YBa_2Cu_3O_(6+x) (x=0.56) 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.

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Suchitra E. Sebastian, N. Harrison, M. M. Altarawneh, Ruixing Liang, D. A. Bonn, W. N. Hardy, G. G. Lonzarich. 2009-12-16. Fermi liquid behaviour in an underdoped high Tc superconductor. https://doi.org/10.1103/physrevb.81.140505

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