Gradual emergence of superconductivity in underdoped La2−xSrxCuO4

Ana-Elena Tutueanu; Machteld E. Kamminga; Tim B. Tejsner; Henrik Jacobsen; Henriette W. Hansen; Monica-Elisabeta Lacatusu; Jacob Baas; Kira L. Eliasen; Jean-Claude Grivel; Yasmine Sassa; Niels Bech Christensen; Paul Steffens; Martin Boehm; Andrea Piovano; Kim Lefmann; Astrid T. Rømer

doi:10.48550/arXiv.2211.01733

Gradual emergence of superconductivity in underdoped La_2−xSr_xCuO₄

Ana-Elena Tutueanu, Machteld E. Kamminga, Tim B. Tejsner, Henrik Jacobsen, Henriette W. Hansen, Monica-Elisabeta Lacatusu, Jacob Baas, Kira L. Eliasen, Jean-Claude Grivel, Yasmine Sassa, Niels Bech Christensen, Paul Steffens, Martin Boehm, Andrea Piovano, Kim Lefmann, Astrid T. Rømer^*

^*Corresponding author for this work

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Abstract

We present triple-axis neutron scattering studies of low-energy magnetic fluctuations in strongly underdoped La_2−xSr_xCuO₄ 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 twodimensional 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.

Original language	English
Journal	arXiv
Number of pages	12
DOIs	https://doi.org/10.48550/arXiv.2211.01733
Publication status	Published - 2022

Bibliographical note

Alternative title: Gradual emergence of superconductivity in underdoped LSCO

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@article{ba24407db9ae41b5b4d053691d6d34ec,

title = "Gradual emergence of superconductivity in underdoped La2−xSrxCuO4",

abstract = "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 twodimensional 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 = "Ana-Elena Tutueanu and Kamminga, {Machteld E.} and Tejsner, {Tim B.} and Henrik Jacobsen and Hansen, {Henriette W.} and Monica-Elisabeta Lacatusu and Jacob Baas and Eliasen, {Kira L.} and Jean-Claude Grivel and Yasmine Sassa and Christensen, {Niels Bech} and Paul Steffens and Martin Boehm and Andrea Piovano and Kim Lefmann and R{\o}mer, {Astrid T.}",

note = "Alternative title: Gradual emergence of superconductivity in underdoped LSCO",

year = "2022",

doi = "10.48550/arXiv.2211.01733",

language = "English",

journal = "arXiv",

publisher = "Cornell University",

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TY - JOUR

T1 - Gradual emergence of superconductivity in underdoped La2−xSrxCuO4

AU - Tutueanu, Ana-Elena

AU - Kamminga, Machteld E.

AU - Tejsner, Tim B.

AU - Jacobsen, Henrik

AU - Hansen, Henriette W.

AU - Lacatusu, Monica-Elisabeta

AU - Baas, Jacob

AU - Eliasen, Kira L.

AU - Grivel, Jean-Claude

AU - Sassa, Yasmine

AU - Christensen, Niels Bech

AU - Steffens, Paul

AU - Boehm, Martin

AU - Piovano, Andrea

AU - Lefmann, Kim

AU - Rømer, Astrid T.

N1 - Alternative title: Gradual emergence of superconductivity in underdoped LSCO

PY - 2022

Y1 - 2022

N2 - 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 twodimensional 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.

AB - 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 twodimensional 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.

U2 - 10.48550/arXiv.2211.01733

DO - 10.48550/arXiv.2211.01733

M3 - Journal article

JO - arXiv

JF - arXiv

ER -