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 174514

Framtidens Lågdimensionella Skyrmion Material

Vetenskapsrådet (VR) (2017-05078), 2019-06-01 -- 2021-12-31.

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1103/PhysRevB.107.174514

Mer information

Senast uppdaterat

2023-06-27