Disappearance of Superconductivity and a Concomitant Lifshitz Transition in Heavily-Overdoped Bi2Sr2CuO6 Superconductor Revealed by Angle-Resolved Photoemission Spectroscopy

Abstract

By partially doping Pb to effectively suppress the superstructure in single-layered cuprate Bi2Sr2CuO6+δ(Pb-Bi2201) and annealing them in vacuum or in high pressure oxygen atmosphere, a series of high quality Pb-Bi2201 single crystals are obtained with Tc covering from 17 K to non-supercondcuting in the overdoped region. High resolution angle resolved photoemission spectroscopy (ARPES) measurements are carried out on these samples to investigate the evolution of the Fermi surface topology with doping in the normal state. Clear and complete Fermi surface are observed and quantitatively analyzed in all these overdoped Pb-Bi2201 samples. A Lifshitz transition from hole-like Fermi surface to electron like Fermi surface with increasing doping is observed at a doping level of ~0.35. This transition coincides with the change that the sample undergoes from superconducting to non-superconducting states. Our results reveal the emergence of an electron-like Fermi surface and the existence of a Lifshitz transition in heavily overdoped Bi2201 samples. They provide important information in understanding the connection between the disappearance of superconductivity and the Lifshitz transition in the overdoped region.

arXiv comment16 Pages of Text plus Figures

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Cited by in corpus (9)

• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• High-T${}_c$ cuprates: a story of two electron subsystems
• Transport signatures of the pseudogap critical point in the cuprate superconductor Bi${}_2$Sr${}_{2-x}$La${}_x$CuO${}_{6+\delta }$
• Ab initio description of the Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ electronic structure
• Ubiquitous Coexisting Electron-Mode Couplings in High Temperature Cuprate Superconductors
• Transport properties of very overdoped nonsuperconducting Bi2Sr2CuO6+d thin films
• Magnetotransport in overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$: a Fermi liquid approach
• Shallow core levels, or how to determine the doping and $T_c$ of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ and Bi${}_2$Sr${}_2$CuO${}_{6+\delta }$ without cooling
• Persistence of vortexlike phase fluctuations in underdoped to heavily overdoped Bi-2201 cuprates