Tl2Ba2CuO6+d Brings Spectroscopic Probes Deep Into the Overdoped Regime of the High-Tc Cuprates

Abstract

Single-particle spectroscopic probes, such as scanning tunneling and angle-resolved photoemission spectroscopy (ARPES), have provided us with crucial insights into the complex electronic structure of the high-Tc cuprates, in particular for the under and optimally doped regimes where high-quality crystals suitable for surface-sensitive experiments are available. Conversely, the elementary excitations on the heavily overdoped side of the phase diagram remain largely unexplored. Important breakthroughs could come from the study of Tl2Ba2CuO6+d (Tl2201), a structurally simple system whose doping level can be tuned from optimal to extreme overdoping by varying the oxygen content. We have grown single crystals of Tl2201, which were then carefully annealed under controlled oxygen partial pressures. Their high quality and homogeneity are demonstrated by narrow rocking curves and superconducting transition widths. These crystals have enabled the first successful ARPES study of both normal and superconducting-state electronic structure in Tl2201, allowing a direct comparison with the Fermi surface from magnetoresistance and the gap from thermal conductivity experiments. This establishes Tl2201 as the first high-Tc cuprate for which a surface-sensitive single-particle spectroscopy and a comparable bulk transport technique have arrived at quantitative agreement on a major feature such as the normal state Fermi surface. The surprising momentum dependence of the ARPES lineshape is also discussed.

Submitted to New Journal of Physics (partly a replacement for cond-mat/0211028). A high-resolution version can be found at http://www.physics.ubc.ca/~quantmat/ARPES/PUBLICATIONS/Articles/Tl_NJP.pdf and related material at http://www.physics.ubc.ca/~quantmat/ARPES/PUBLICATIONS/articles.html

References in corpus (8)

• Scanning tunneling spectroscopy of high-temperature superconductors
• A `checkerboard' electronic crystal state in lightly hole-doped Ca_{2-x}Na_{x}CuO_{2}Cl_{2}
• Inelastic Light Scattering From Correlated Electrons
• Abrupt transition in quasiparticle dynamics at optimal doping in a cuprate superconductor system
• Doping Dependence of the Redistribution of Optical Spectral Weight in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Competing ferromagnetism in high temperature copper oxide superconductors
• Normal state electronic structure in the heavily overdoped regime of Bi1.74Pb0.38Sr1.88CuO6+delta single-layer cuprate superconductors
• Effect of Hole Doping on the Electronic Structure of Tl2201

Cited by in corpus (16)

• Two Gaps Make a High Temperature Superconductor?
• Snapshots of the retarded interaction of charge carriers with ultrafast fluctuations in cuprates
• Correlation between $T_c$ and anisotropic scattering in Tl${}_2$Ba${}_2$CuO${}_{6+\delta }$
• Measurement of x-ray absorption spectra of overdoped high-temperature cuprate superconductors: Inapplicability of the single-band Hubbard model
• Unified electronic phase diagram for hole-doped high-Tc cuprates
• Fermi pockets and correlation effects in underdoped YBa2Cu3O6.5
• Higgs criticality in a two-dimensional metal
• Angle dependent magnetoresistance measurements in Tl${}_2$Ba${}_2$CuO${}_{6+\delta }$ and the need for anisotropic scattering
• Sensitivity of the interlayer magnetoresistance of layered metals to intralayer anisotropies
• Composite Operator Method analysis of the underdoped cuprates puzzle
• Bulk Fermi surface and momentum density in heavily doped La${}_{2-x}$Sr${}_x$CuO${}_4$ using high resolution Compton scattering and positron annihilation spectroscopies
• Terahertz magneto-transport measurements in underdoped PCCO and comparison with ARPES
• Terahertz Hall Measurements On Optimally Doped Single Crystal Bi-2212
• Evolution with hole doping of the electronic excitation spectrum in the cuprate superconductors
• Controlling the self-doping of YBa2C3O7-d polar surfaces: From Fermi surface to nodal Fermi arcs by ARPES
• Examination of the claim by Loram and Tallon that the energy-resolved STM results, in their apparent inhomogeneity, misrepresent the true bulk behaviour of the HTSC cuprates