Continuous doping of a cuprate surface: new insights from in-situ ARPES

Abstract

The cuprate superconductors distinguish themselves from the conventional superconductors in that a small variation in the carrier doping can significantly change the superconducting transition temperature (T_c), giving rise to a superconducting dome where a pseudogap (ref. 1,2) emerges in the underdoped region and a Fermi liquid appears in the overdoped region. Thus a systematic study of the properties over a wide doping range is critical for understanding the superconducting mechanism. Here, we report a new technique to continuously dope the surface of Bi2Sr2CaCu2O8+x through an ozone/vacuum annealing method. Using in-situ ARPES, we obtain precise quantities of energy gaps and the coherent spectral weight over a wide range of doping. We discover that the d-wave component of the quasiparticle gap is linearly proportional to the Nernst temperature that is the onset of superconducting vortices (ref. 3), strongly suggesting that the emergence of superconducting pairing is concomitant with the onset of free vortices, with direct implications for the onset of superconducting phase coherence at T_c and the nature of the pseudogap phenomena.

arXiv comment23 pages, 10 figures, 1 table, supplementary materials included

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Cited by in corpus (16)

• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Cuprate superconductors as viewed through a striped lens
• Low-energy antiferromagnetic spin fluctuations limit the coherent superconducting gap in cuprates
• Particle-hole asymmetric superconducting coherence peaks in overdoped cuprates
• Generalization of Anderson's Theorem for Disordered Superconductors
• Emergent superconducting fluctuations in a compressed kagome superconductor
• Unified intermediate coupling description of the pseudogap and the strange metal phases of cuprates
• Anomalous doping evolution of nodal dispersion revealed by in-situ ARPES on continuously doped cuprates
• Observation of Fermi-surface-dependent anisotropic Cooper pairing in kagome superconductor CsV3Sb5
• Electronic inhomogeneity and band structure on superstructural CuO2 planes of infinite-layer Sr0.94La0.06CuO2+y films
• Phenomenological Single-Particle Green's Function for the Pseudogap and Superconducting Phases of High-T${}_c$ Cuprates
• Crossover from Fermi Arc to Full Fermi Surface
• Suppression of Antiferromagnetism in Electron-Doped Cuprate $T^{\prime }$-${\mathrm{La}}_{2-x}{\mathrm{Ce}}_x{\mathrm{CuO}}_{4\pm \delta }$
• Continuously Doping Bi 2 Sr 2 CaCu 2 O 8+δ into Electron-Doped Superconductor by CaH 2 Annealing Method
• Empirical case for two pseudogaps in cuprate superconductors
• BCS-BEC crossover driven by small Fermi pockets of a high-Tc cuprate superconductor