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Opening a nodal gap by fluctuating spin-density wave in lightly doped La2-xSrxCuO4

TitleOpening a nodal gap by fluctuating spin-density wave in lightly doped La2-xSrxCuO4
Publication TypeJournal Article
Year of Publication2017
AuthorsKapon, I, Ellis, DS, Drachuck, G, Bazalitski, G, Weschke, E, Schierle, E, Strempfer, J, Niedermayer, C, Keren, A
JournalPhysical Review B
Volume95
Pagination104512
Date Published03
Type of ArticleArticle
ISBN Number2469-9950
Accession NumberWOS:000396272600006
Keywordsoxide, physics, spectrometer, transition
Abstract

We investigate whether the spin or charge degrees of freedom are responsible for the nodal gap in underdoped cuprates by performing inelastic neutron scattering and x-ray diffraction measurements on La2-xSrxCuO4, which is on the edge of the antiferromagnetic phase. We found that a fluctuating incommensurate spin-density wave (SDW) with a bottom part of an hourglass dispersion exists even in this magnetic sample. The strongest component of these fluctuations diminishes at the same temperature where the nodal gap opens. X-ray scattering measurements on the same crystal show no signature of a charge-density wave (CDW). Therefore, we suggest that the nodal gap in the electronic band of this cuprate opens due to fluctuating SDW with no contribution from CDW.

DOI10.1103/PhysRevB.95.104512
Custom 1

Not AL

Alternate JournalPhys. Rev. B