Title: Differentiated roles of Lifshitz transition on thermodynamics and superconductivity in La _{2- x} Sr _x CuO ₄

Abstract

We report 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 overdoped La-based cuprates where the Fermi surface transforms from hole-like to electron-like. In this study we report an in situ angle-resolved photoemission spectroscopy study of three-dimensional Fermi surfaces in La_2-xSr_xCuO₄ thin films (x = 0.06 to 0.35). With accurate k_z dispersion quantification, the said 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, reveals a doping-dependent profile with a maximum at x = 0.21 that 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.

Authors:

Zhong, Yong ^[1]; Chen, Zhuoyu ^[2]; Chen, Su-Di ^[2]; Xu, Ke-Jun  ^[2];

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• Search DOE PAGES for ORCID "0000-0003-2109-0765"

Hashimoto, Makoto ^[3]; He, Yu ^[4]; Uchida, Shin-ichi ^[5]; Lu, Donghui ^[3]; Mo, Sung-Kwan  ^[6];

• Search DOE PAGES for author "Mo, Sung-Kwan"
• Search DOE PAGES for ORCID "0000-0003-0711-8514"

Shen, Zhi-Xun  ^[7]

• Search DOE PAGES for author "Shen, Zhi-Xun"
• Search DOE PAGES for ORCID "0000-0002-1454-0281"

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1. Stanford Institute for Materials and Energy Sciences, Stanford Linear Accelerator Center (SLAC) National Accelerator Laboratory, Menlo Park, CA 94025, Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, Department of Applied Physics, Stanford University, Stanford, CA 94305
2. Stanford Institute for Materials and Energy Sciences, Stanford Linear Accelerator Center (SLAC) National Accelerator Laboratory, Menlo Park, CA 94025, Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, Department of Applied Physics, Stanford University, Stanford, CA 94305
3. Stanford Synchrotron Radiation Lightsource, Stanford Linear Accelerator Center (SLAC) National Accelerator Laboratory, Menlo Park, CA 94025
4. Department of Applied Physics, Yale University, New Haven, CT 06511
5. Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
6. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720
7. Stanford Institute for Materials and Energy Sciences, Stanford Linear Accelerator Center (SLAC) National Accelerator Laboratory, Menlo Park, CA 94025, Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, Department of Applied Physics, Stanford University, Stanford, CA 94305, Department of Physics, Stanford University, Stanford, CA 94305

Publication Date:

Tue Aug 09 00:00:00 EDT 2022

Research Org.:

Stanford Univ., CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:

USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division

OSTI Identifier:

1879168

Alternate Identifier(s):

OSTI ID: 1880269; OSTI ID: 1888490

Grant/Contract Number:  

AC02-76SF00515; AC02-05CH11231

Resource Type:

Published Article

Journal Name:

Proceedings of the National Academy of Sciences of the United States of America

Additional Journal Information:

Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 119 Journal Issue: 32; Journal ID: ISSN 0027-8424

Publisher:

Proceedings of the National Academy of Sciences

Country of Publication:

United States

Language:

English

Subject:

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY