Gradual emergence of superconductivity in underdoped La2-x Srx CuO4
Artikel i vetenskaplig tidskrift, 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.
Författare
A. E. Ţuţueanu
Niels Bohr Institute
Institut Laue-Langevin
MacHteld E. Kamminga
Niels Bohr Institute
Universiteit Utrecht
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
Rijksuniversiteit Groningen
K. L. Eliasen
Niels Bohr Institute
Roskilde Universitet (RUC)
J. C. Grivel
Danmarks Tekniske Universitet (DTU)
Yasmine Sassa
Chalmers, Fysik, Materialfysik
Niels Bech Christensen
Danmarks Tekniske Universitet (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
Dansk Fundamental Metrologi A/S
Physical Review B
24699950 (ISSN) 24699969 (eISSN)
Vol. 107 17 174514Framtidens Lågdimensionella Skyrmion Material
Vetenskapsrådet (VR) (2017-05078), 2019-06-01 -- 2021-12-31.
Ämneskategorier
Den kondenserade materiens fysik
DOI
10.1103/PhysRevB.107.174514