Angle-resolved photoemission spectroscopy of Na-doped Ca2CuO2Cl2 single crystals: Fingerprints of a magnetic insulator in a heavily underdoped superconductor

Abstract

Electronic evolution from an antiferromagnet to a high-Tc superconductor is revealed by angle-resolved photoemission experiments on tetragonal Ca(1.9)Na(0.1)CuO(2)Cl(2) single crystals, which were successfully grown for the first time under high pressures. In this underdoped superconductor, we found clear fingerprints of the parent insulator: a shadow band and a large pseudo-gap. These observations are most likely described by a "chemical potential shift", which contrasts clearly with the prevailing wisdom of the "pinned chemical potential" learned from the prototype La(2-x)Sr(x)CuO(4), demonstrating that the route to a high-Tc superconductor is not unique.

arXiv comment4 pages, 4 figures

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• Theory of Underdoped Cuprates
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• Photoemission Evidence for a Remnant Fermi Surface and d-Wave-Like Dispersion in Insulating Ca2CuO2Cl2
• Signature of Superfluid Density in the Single-Particle Excitation Spectrum of Bi2Sr2CaCu2O8+delta
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• Electronic Structure of La2-xSrxCuO4 in the Vicinity of the Superconductor-Insulator Transition
• Evolution of a Metal to Insulator Transition in Ca${}_{2-x}$Na${}_x$CuO${}_2$Cl${}_2$, as seen by ARPES

Cited by in corpus (14)

• Doping evolution of the electronic structure in the single-layer cuprates Bi${}_2$Sr${}_{2-x}$La${}_x$CuO${}_{6+\delta }$: Comparison with other single-layer cuprates
• Fully Gapped Single-Particle Excitations in the Lightly Doped Cuprates
• Doped carrier formulation and mean-field theory of the tt't''J model
• New mean field theory of the tt't''J model applied to the high-Tc superconductors
• The Full Mottness
• Origin of the shadow Fermi surface in Bi-based cuprates
• Magnetic Phase Diagram of the Hole-doped Ca${}_{2-x}$Na${}_x$CuO${}_2$Cl${}_2$ Cuprate Superconductor
• Spin-polaron band structure and hole pockets in underdoped cuprates
• On the cuprates' universal waterfall feature: evidence of a momentum-driven crossover
• Energy-Dependent Enhancement of the Electron-Coupling Spectrum of the Underdoped Bi2Sr2CaCu2O8+d Superconductor
• Influence of oxygen-coordination number on the electronic structure of single-layer La-based cuprates
• Universal intrinsic doping behavior of in-plane dc conductivity for hole-doped high-temperature cuprate superconductors
• The short-range correlations of a doped Mott insulator
• Antiferromagnetism and singlet formation in underdoped high-Tc cuprates: Implications for superconducting pairing