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- W1885827156 abstract "We study underdoped high-${T}_{c}$ superconductors YBa${}_{2}$Cu${}_{3}$O${}_{6.5}$ and YBa${}_{2}$Cu${}_{4}$O${}_{8}$ using first-principles pseudopotential methods with additional Coulomb interactions at the Cu atoms and obtain Fermi-surface pocket areas in close agreement with measured Shubnikov-de Haas and de Haas-van Alphen oscillations. With antiferromagnetic order in CuO${}_{2}$ planes, stable in the calculations, small hole pockets are formed near the so-called Fermi-arc positions in the Brillouin zone, which reproduce the low-frequency oscillations. A large electron pocket, necessary for the negative Hall coefficient, is also formed in YBa${}_{2}$Cu${}_{3}$O${}_{6.5}$, giving rise to the high-frequency oscillations as well. Effective masses and specific heats are also calculated. Our results highlight the important role of magnetic order in the electronic structure of underdoped high-${T}_{c}$ superconductors." @default.
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- W1885827156 date "2011-07-27" @default.
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- W1885827156 title "Fermi surfaces and quantum oscillations in the underdoped high-Tcsuperconductors YBa2Cu3O6.5and YBa2Cu4O8" @default.
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- W1885827156 doi "https://doi.org/10.1103/physrevb.84.014518" @default.
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