Quantum oscillations in underdoped YBa_2Cu_3O_6.5

Abstract

Shubnikov-de Haas and de Haas-van Alphen effects have been measured in the underdoped high temperature superconductor YBa${}_2$Cu${}_3$O${}_{6.51}$. Data are in agreement with the standard Lifshitz-Kosevitch theory, which confirms the presence of a coherent Fermi surface in the ground state of underdoped cuprates. A low frequency $F=530\pm 10$ T is reported in both measurements, pointing to small Fermi pocket, which corresponds to 2% of the first Brillouin zone area only. This low value is in sharp contrast with that of overdoped Tl${}_2$Ba${}_2$CuO${}_{6+\delta }$, where a high frequency $F=18$ kT has been recently reported and corresponds to a large hole cylinder in agreement with band structure calculations. These results point to a radical change in the topology of the Fermi surface on opposing sides of the cuprate phase diagram.

proceeding of the ECRYS-2008

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Cited by in corpus (8)

• Lifshitz critical point in the cuprate superconductor YBa2Cu3Oy from high-field Hall effect measurements
• Planes, Chains, and Orbits: Quantum Oscillations and High Magnetic Field Heat Capacity in Underdoped YBCO
• Quantum Oscillations in Hole-Doped Cuprates
• Hall effect and Fermi surface reconstruction via electron pockets in the high-$T_c$ cuprates
• Catalyst-Free Growth of Millimeter-Long Topological Insulator Bi2Se3 Nanoribbons and the Observation of pi Berry Phase
• Lifshitz Transition in Underdoped Cuprates
• Universal inhomogeneous magnetic-field response in the normal state of cuprate high-Tc superconductors
• Effects of thermal phase fluctuations in a 2D superconductor: an exact result for the spectral function