Multiple scattering camouflaged as magnetic stripes in single crystals of superconducting (La,Sr)2CuO4

Ana-Elena Tutueanu; Tim Birger Tejsner; Monica-Elisabeta Lacatusu; Henriette Wase Hansen; Kira Lieberkind Eliasen; Martin Böhm; Paul Steffens; Christoph Niederhauser; Kim Lefmann

doi:10.3233/JNR-190144

Multiple scattering camouflaged as magnetic stripes in single crystals of superconducting (La,Sr)2CuO4

Bidragets oversatte titel: Flerspredning kamufleret som magnetiske striber i en enkelkrystal, superledende (La,Sr)2CuO4

Ana-Elena Tutueanu^*, Tim Birger Tejsner, Monica-Elisabeta Lacatusu, Henriette Wase Hansen, Kira Lieberkind Eliasen, Martin Böhm, Paul Steffens, Christoph Niederhauser, Kim Lefmann

^*Corresponding author

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

Abstract

Neutronspredning er et meget lovende redskab i forhold til at undersøge magnetiske signaler i høj-temperaturssuperledere. Vi vil her rapportere fund fra et neutronspredningseksperiment på den superledende krystal (La,Sr,)2CuO4, hvor et spuriost signal så ud til at være signalet fra de magnetiske såkalde striber. Signal styrken blev fundet til at være stærkt afhængig af neutronenergien. Derfor mener vi at dette signal er opstået som konsekvens af et flerspredningssignal samt krystal twinning. En udregning af spredningsintensiteten inkluderende disse to effekter gengiver næsten nøjagtigt vores eksperimentelle observationener. Vi vil derfor understrege behovet for at lave sådan en analyse når der søges efter måder at undgå disse spuriose spredningssignaler.

Bidragets oversatte titel	Flerspredning kamufleret som magnetiske striber i en enkelkrystal, superledende (La,Sr)2CuO4
Originalsprog	Engelsk
Tidsskrift	Journal of Neutron Research
Vol/bind	22
Udgave nummer	1
Sider (fra-til)	49-56
Antal sider	8
ISSN	1023-8166
DOI	https://doi.org/10.3233/JNR-190144
Status	Udgivet - 2020

Link til dokument

10.3233/JNR-190144

Citer dette

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title = "Multiple scattering camouflaged as magnetic stripes in single crystals of superconducting (La,Sr)2CuO4",

abstract = "Neutron diffraction has been a very prominent tool to investigate high-temperature superconductors, in particular through the discovery of an incommensurate magnetic signal known as stripes. We here report the findings of a neutron diffraction experiment on the superconductor (La,Sr)2CuO4, where a spurious signal appeared to be magnetic stripes. The signal strength was found to be strongly dependent on the neutron energy, peaking at E=4.6 meV. We therefore attribute the origin of this signal to be a combination of multiple scattering and crystal twinning. A forward calculation of the scattering intensity including these two effects almost completely recovers our experimental observations. We emphasize the need for employing such analysis when searching for ways to avoid spurious scattering signals.",

keywords = "LSCO, Multiple scattering, neutron scattering, stripes",

author = "Ana-Elena Tutueanu and Tejsner, {Tim Birger} and Monica-Elisabeta Lacatusu and Hansen, {Henriette Wase} and Eliasen, {Kira Lieberkind} and Martin B{\"o}hm and Paul Steffens and Christoph Niederhauser and Kim Lefmann",

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doi = "10.3233/JNR-190144",

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T1 - Multiple scattering camouflaged as magnetic stripes in single crystals of superconducting (La,Sr)2CuO4

AU - Tutueanu, Ana-Elena

AU - Tejsner, Tim Birger

AU - Lacatusu, Monica-Elisabeta

AU - Hansen, Henriette Wase

AU - Eliasen, Kira Lieberkind

AU - Böhm, Martin

AU - Steffens, Paul

AU - Niederhauser, Christoph

AU - Lefmann, Kim

PY - 2020

Y1 - 2020

N2 - Neutron diffraction has been a very prominent tool to investigate high-temperature superconductors, in particular through the discovery of an incommensurate magnetic signal known as stripes. We here report the findings of a neutron diffraction experiment on the superconductor (La,Sr)2CuO4, where a spurious signal appeared to be magnetic stripes. The signal strength was found to be strongly dependent on the neutron energy, peaking at E=4.6 meV. We therefore attribute the origin of this signal to be a combination of multiple scattering and crystal twinning. A forward calculation of the scattering intensity including these two effects almost completely recovers our experimental observations. We emphasize the need for employing such analysis when searching for ways to avoid spurious scattering signals.

AB - Neutron diffraction has been a very prominent tool to investigate high-temperature superconductors, in particular through the discovery of an incommensurate magnetic signal known as stripes. We here report the findings of a neutron diffraction experiment on the superconductor (La,Sr)2CuO4, where a spurious signal appeared to be magnetic stripes. The signal strength was found to be strongly dependent on the neutron energy, peaking at E=4.6 meV. We therefore attribute the origin of this signal to be a combination of multiple scattering and crystal twinning. A forward calculation of the scattering intensity including these two effects almost completely recovers our experimental observations. We emphasize the need for employing such analysis when searching for ways to avoid spurious scattering signals.

KW - LSCO

KW - Multiple scattering

KW - neutron scattering

KW - stripes

U2 - 10.3233/JNR-190144

DO - 10.3233/JNR-190144

M3 - Journal article

SN - 1023-8166

VL - 22

SP - 49

EP - 56

JO - Journal of Neutron Research

JF - Journal of Neutron Research

IS - 1

ER -