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Title: Dependence of the critical temperature in overdoped copper oxides on superfluid density

Journal Article · · Nature (London)
DOI:https://doi.org/10.1038/nature19061· OSTI ID:1302997
 [1];  [1];  [2];  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); Yale Univ., New Haven, CT (United States). Applied Physics Dept.
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)

The physics of underdoped copper oxide superconductors, including the pseudogap, spin and charge ordering and their relation to superconductivity, is intensely debated. The overdoped copper oxides are perceived as simpler, with strongly correlated fermion physics evolving smoothly into the conventional Bardeen–Cooper–Schrieffer (BCS) behaviour. Pioneering studies on a few overdoped samples indicated that the superfluid density was much lower than expected, but this was attributed to pair-breaking, disorder and phase separation. Here we report the way in which the magnetic penetration depth and the phase stiffness depend on temperature and doping by investigating the entire overdoped side of the La2-xSrxCuO4 phase diagram. We measured the absolute values of the magnetic penetration depth and the phase stiffness to an accuracy of one per cent in thousands of samples; the large statistics reveal clear trends and intrinsic properties. The films are homogeneous; variations in the critical superconducting temperature within a film are very small (less than one kelvin). At every level of doping the phase stiffness decreases linearly with temperature. The dependence of the zero-temperature phase stiffness on the critical superconducting temperature is generally linear, but with an offset; however, close to the origin this dependence becomes parabolic. In conclusion, this scaling law is incompatible with the standard BCS description.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1302997
Alternate ID(s):
OSTI ID: 1336197
Report Number(s):
BNL-112397-2016-JA; BNL-113191-2016-JA; R&D Project: MA509MACA; KC0203020
Journal Information:
Nature (London), Vol. 536, Issue 7616; ISSN 0028-0836
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 212 works
Citation information provided by
Web of Science

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The Vanishing Superfluid Density in Cuprates—and Why It Matters journal July 2018
Detecting Electronic Nematicity by the Angle-Resolved Transverse Resistivity Measurements journal October 2018
Parabolic Scaling in Overdoped Cuprate Films journal June 2019
Doping Dependence of Electromagnetic Response in Cuprate Superconductors journal September 2019
Design of Complex Oxide Interfaces by Oxide Molecular Beam Epitaxy journal October 2019
The Quest for High(er) Tc in BaBiO3-Based Heterostructures journal November 2019
Parabolic Scaling in Overdoped Cuprate: a Statistical Field Theory Approach journal January 2020
Phase transition in the cuprates from a magnetic-field-free stiffness meter viewpoint journal June 2019
Disappearance of superconductivity due to vanishing coupling in the overdoped Bi$$_{2}$$2Sr$$_{2}$$2CaCu$$_{2}$$2O$$_{8+\delta }$$8+δ journal January 2020
Large-area borophene sheets on sacrificial Cu(111) films promoted by recrystallization from subsurface boron journal August 2019
Crossover from two-dimensional to three-dimensional superconducting states in bismuth-based cuprate superconductor journal December 2019
Electron pairing in the pseudogap state revealed by shot noise in copper oxide junctions journal August 2019
In situ /non-contact superfluid density measurement apparatus journal April 2018
Higher superconducting transition temperature by breaking the universal pressure relation journal January 2019
High-temperature superconductivity in one-unit-cell FeSe films journal March 2017
Photoemission perspective on pseudogap, superconducting fluctuations, and charge order in cuprates: a review of recent progress journal April 2018
Critical current enhancement driven by suppression of superconducting fluctuation in ion-gated ultrathin FeSe journal March 2018
Superconducting transition in a non-superconducting PrBa 2 Cu 3 O 7 film triggered by interfacial carrier injection journal January 2020
Supercurrent flow with large superconductor gap in cuprates: resurrection of phonon-mediated Cooper pairs journal March 2019
Flat bands and strongly correlated Fermi systems journal April 2019
Electron pairing: from metastable electron pair to bipolaron journal March 2018
Superfluid stiffness in cuprates: Effect of Mott transition and phase competition journal September 2019
BKT transition observed in magnetic and electric properties of YBa 2 Cu 3 O 7 δ single crystals journal September 2019
Impact of anisotropic interactions on nonequilibrium cluster growth at surfaces journal October 2018
Suppression of Superfluid Density and the Pseudogap State in the Cuprates by Impurities journal December 2016
Diamagnetic Response of Potassium-Adsorbed Multilayer FeSe Film journal December 2019
Unusual behavior of cuprates explained by heterogeneous charge localization journal January 2019
Scale-invariant magnetoresistance in a cuprate superconductor journal August 2018
Quantum mechanism of condensation and high T c superconductivity journal June 2019
Superconducting Properties of 3D Low-Density Translation-Invariant Bipolaron Gas journal January 2018
Superconducting properties of a nonideal bipolaron gas [Сверхпроводящие свойства неидеального газа ТИ-биполяронов] journal January 2018
Translation-invariant bipolaron theory of superconductivity and spectroscopic experiments [Трансляционно-инвариантная биполяронная теория сверхпроводимости и спектроскопические эксперименты] journal January 2019
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Scaling between Superfluid Density and Tc in Overdoped La2−xSrxCuO4 Films journal June 2019
Superconducting properties of a nonideal bipolaron gas journal June 2019
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Can high- T c superconductivity in cuprates be explained by the conventional BCS theory? journal June 2018
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Unconventional short-range structural fluctuations in cuprate high-$T_c$ superconductors text January 2021
Universal scaling of the critical temperature and the strange-metal scattering rate in unconventional superconductors text January 2021

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