Coherent c-axis transport in the underdoped cuprate superconductor YBCO

Abstract

The electrical resistivity rho_c of the underdoped cuprate superconductor YBCO was measured perpendicular to the CuO_2 planes on ultra-high quality single crystals in magnetic fields large enough to suppress superconductivity. The incoherent insulating-like behavior of rho_c at high temperature, characteristic of all underdoped cuprates, is found to cross over to a coherent regime of metallic behavior at low temperature. This crossover coincides with the emergence of the small electron pocket detected in the Fermi surface of YBCO via quantum oscillations, the Hall and Seebeck coefficients and with the detection of a unidirectional modulation of the charge density as seen by high-field NMR measurements. The low coherence temperature is quantitatively consistent with the small hopping integral t_perp inferred from the splitting of the quantum oscillation frequencies. We conclude that the Fermi-surface reconstruction in YBCO at dopings from p = 0.08 to at least p = 0.15, attributed to stripe order, produces a metallic state with 3D coherence deep in the underdoped regime.

7 pages, 7 figures

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• Fermi-surface reconstruction in a smectic phase of a high temperature superconductor
• Anomalous c-axis transport in layered metals

Cited by in corpus (15)

• Direct measurement of the upper critical field in a cuprate superconductor
• Magnetic field controlled charge density wave coupling in underdoped YBa${}_2$Cu${}_3$O${}_{6+x}$
• Quantum Oscillations in Hole-Doped Cuprates
• Evidence for a small hole pocket in the Fermi surface of underdoped YBa2Cu3Oy
• Fermi surface reconstruction from bilayer charge ordering in the underdoped high temperature superconductor YBa2Cu3O6+x
• Magnetic field-enhanced spin freezing in YBa2Cu3O6.45 at the verge of the competition between superconductivity and charge order
• Fermi Surface Reconstruction and Quantum Oscillations in Underdoped YBa${}_2$Cu${}_3$O${}_{7-x}$ Modeled in a Single Bilayer with Mirror Symmetry Broken by Charge Density Waves
• Evolution of superconducting correlations within magnetic-field-decoupled CuO(2) layers of La(1.905)Ba(0.095)CuO(4)
• Cu-NMR study of oxygen disorder in ortho-II YBa2Cu3Oy
• Evidence for magnetic-field-induced decoupling of superconducting bilayers in La${}_{2-x}$Ca${}_{1+x}$Cu${}_2$O${}_6$
• Transport enhancement from incoherent coupling between one-dimensional quantum conductors
• Electron-phonon pairing mechanism: cuprates with high value of the critical temperature
• Observation of a subharmonic gap singularity in interlayer tunneling characteristics of Bi2Sr2CaCu2O8+d
• Fermi Surface Reconstruction in Underdoped Cuprates: The Origin of Electron Pockets
• Separation of magnetic and superconducting behaviour in YBCO6.33 (Tc=8.4 K)