Differentiated roles of Lifshitz transition on thermodynamics and superconductivity in La2-xSrxCuO4

Abstract

The effect of Lifshitz transition on thermodynamics and superconductivity in hole-doped cuprates has been heavily debated but remains an open question. In particular, an observed peak of electronic specific heat is proposed to originate from fluctuations of a putative quantum critical point p* (e.g. the termination of pseudogap at zero temperature), which is close to, but distinguishable from the Lifshitz transition in La-based cuprates. Here, we report an in situ angle-resolved photoemission spectroscopy study of three-dimensional Fermi surfaces in La2-xSrxCuO4 thin films(x = 0.06 - 0.35). With accurate kz dispersion quantification, the Lifshitz transition is determined to happen within a finite range around x = 0.21. Normal state electronic specific heat, calculated from spectroscopy-derived band parameters, agrees with previous thermodynamic microcalorimetry measurements. The account of the specific heat maximum by underlying band structures excludes the need for additionally dominant contribution from the quantum fluctuations at p*. A d-wave superconducting gap smoothly across the Lifshitz transition demonstrates the insensitivity of superconductivity to the dramatic density of states enhancement.

References in corpus (10)

• Theory of Intertwined Orders in High Temperature Superconductors
• Low-Energy Electronic Structure of the High-Tc Cuprates La2-xSrxCuO4 Studied by Angle-resolved Photoemission Spectroscopy
• Fermi Surface Evolution in an Electron-Doped High-Tc Superconductor Revealed by Magnetic Quantum Oscillations
• Fermi surface and van Hove singularities in the itinerant metamagnet Sr3Ru2O7
• Pseudogap phase of cuprate superconductors confined by Fermi surface topology
• Elastocaloric determination of the phase diagram of Sr${}_2$RuO${}_4$
• Coexistence of metallicity and superconductivity in adjacent bilayers of a high-Tc superconductor
• Negative Hall coefficients of heavily overdoped La2-xSrxCuO4
• Differentiated roles of Lifshitz transition on thermodynamics and superconductivity in La2-xSrxCuO4
• The overdoped end of the cuprate phase diagram

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• Prevailing charge order in overdoped cuprates beyond the superconducting dome
• Evolution of the cyclotron mass with doping in La${}_{2-x}$Sr${}_x$CuO${}_4$
• From non-metal to strange metal at the stripe-percolation transition in La${}_{2-x}$Sr${}_x$CuO${}_4$
• Magnon interactions in a moderately correlated Mott insulator
• Transport properties and doping evolution of the Fermi surface in cuprates
• Rashba spin-orbit coupling in infinite-layer nickelate films on SrTiO3(001) and KTaO3(001)
• Carrier density crossover and quasiparticle mass enhancement in a doped 5$d$ Mott insulator
• A Theoretical Study of Doping Evolution of Phonons in High-Temperature Cuprate Superconductors
• Unified model of the Hall effect from insulator to overdoped compounds in cuprate superconductors
• Oxide MBE-ARPES at SSRL Beamline 5-2
• Cuprates, Pnictides and Sulfosalts: Lessons in Functional Materials
• The role of the pseudogap in cuprate superconductors revealed by the Hall effect
• Exceptional van Hove Singularities in Pseudogapped Metals
• Strange metal at the Lifshitz transition
• BCS-BEC crossover driven by small Fermi pockets of a high-Tc cuprate superconductor