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Rotation symmetry breaking in La2-xSrxCuO4 revealed by angle-resolved photoemission spectroscopy
KTH, School of Engineering Sciences (SCI), Applied Physics, Material Physics, MF. Ecole Polytech Fed Lausanne, Switzerland.
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2017 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 95, no 22, 224504Article in journal (Refereed) Published
Abstract [en]

Using angle-resolved photoemission spectroscopy it is revealed that in the vicinity of optimal doping the electronic structure of La2-x SrxCuO4 cuprate undergoes an electronic reconstruction associated with a wave vector q(a) = (pi, 0). The reconstructed Fermi surface and folded band are distinct to the shadow bands observed in BSCCO cuprates and in underdoped La2-xSrxCuO4 with x <= 0.12, which shift the primary band along the zone diagonal direction. Furthermore, the folded bands appear only with q(a) = (pi, 0) vector, but not with q(b) = (0, pi). We demonstrate that the absence of q(b) reconstruction is not due to thematrix-element effects in the photoemission process, which indicates the fourfold symmetry is broken in the system.

Place, publisher, year, edition, pages
American Physical Society, 2017. Vol. 95, no 22, 224504
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-210475DOI: 10.1103/PhysRevB.95.224504ISI: 000402799700005OAI: oai:DiVA.org:kth-210475DiVA: diva2:1120138
Funder
Swedish Research Council, 2016-06955
Note

QC 20170705

Available from: 2017-07-05 Created: 2017-07-05 Last updated: 2017-07-05Bibliographically approved

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Månsson, MartinTjernberg, Oscar
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