Gradual emergence of superconductivity in underdoped La2-x Srx CuO4
Journal article, 2023
We present triple-axis neutron scattering studies of low-energy magnetic fluctuations in strongly underdoped La2-xSrxCuO4 with x=0.05, 0.06 and 0.07, providing quantitative evidence for a direct competition between these fluctuations and superconductivity. At dopings x=0.06 and x=0.07, three-dimensional superconductivity is found, while only a very weak signature of two-dimensional superconductivity residing in the CuO2 planes is detectable for x=0.05. We find a surprising suppression of the low-energy fluctuations by an external magnetic field at all three dopings. This implies that the response of two-dimensional superconductivity to a magnetic field is similar to that of a bulk superconductor. Our results provide direct evidence of a very gradual onset of superconductivity in cuprates.
Author
A. E. Ţuţueanu
Niels Bohr Institute
Institut Laue-Langevin
MacHteld E. Kamminga
Niels Bohr Institute
Utrecht University
Tim B. Tejsner
Niels Bohr Institute
Institut Laue-Langevin
Henrik Jacobsen
Laboratory for Neutron Scattering, Villigen
Niels Bohr Institute
Henriette Wase Hansen
Niels Bohr Institute
M. E. Lǎcǎtuşu
Laboratory for Neutron Scattering, Villigen
Niels Bohr Institute
Jacob Baas
University of Groningen
K. L. Eliasen
Niels Bohr Institute
Roskilde University (RUC)
J. C. Grivel
Technical University of Denmark (DTU)
Yasmine Sassa
Chalmers, Physics, Materials Physics
Niels Bech Christensen
Technical University of Denmark (DTU)
Paul Steffens
Institut Laue-Langevin
Martin Boehm
Institut Laue-Langevin
Andrea Piovano
Institut Laue-Langevin
K. Lefmann
Niels Bohr Institute
Astrid T. Rømer
Niels Bohr Institute
Danish Fundamental Metrology
Physical Review B
24699950 (ISSN) 24699969 (eISSN)
Vol. 107 17 174514Realization of Novel Low‐Dimensional Skyrmion Systems
Swedish Research Council (VR) (2017-05078), 2019-06-01 -- 2021-12-31.
Subject Categories
Condensed Matter Physics
DOI
10.1103/PhysRevB.107.174514