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Multiple Quantum Oscillations in the de Haas van Alphen Spectra of the Underdoped High Temperature Superconductor YBa_2Cu_3O_6.5
Alain Audouard, Cyril Jaudet, David Vignolles +5
By improving the experimental conditions and extensive data accumulation, we have achieved very high-precision in the measurements of the de Haas-van Alphen effect in the underdope…
Thermopower across the pseudogap critical point of La(1.6-x)Nd(0.4)Sr(x)CuO(4): Evidence for a quantum critical point in a hole-doped high-Tc superconductor
R. Daou, Olivier Cyr-Choinière, Francis Laliberté +6
The thermopower S of the high-Tc superconductor La(1.6-x)Nd(0.4)Sr(x)CuO(4) was measured as a function of temperature T near its pseudogap critical point, the critical hole doping…
Electron pockets in the Fermi surface of hole-doped high-Tc superconductors
David LeBoeuf, Nicolas Doiron-Leyraud, Julien Levallois +11
High-temperature superconductivity occurs as copper oxides are chemically tuned to have a carrier concentration intermediate between their metallic state at high doping and their i…
Linear-T resistivity and change in Fermi surface at the pseudogap critical point of a high-Tc superconductor
R. Daou, David LeBoeuf, Nicolas Doiron-Leyraud +9
A fundamental question of high-temperature superconductors is the nature of the pseudogap phase which lies between the Mott insulator at zero doping and the Fermi liquid at high do…
Quantum oscillations and the Fermi surface in an underdoped high-Tc superconductor
Nicolas Doiron-Leyraud, Cyril Proust, David LeBoeuf +6
Despite twenty years of research, the phase diagram of high transition- temperature superconductors remains enigmatic. A central issue is the origin of the differences in the physi…