# Rotation symmetry breaking in ${\mathrm{La}}_{2-x}{\mathrm{Sr}}_{x}{\mathrm{CuO}}_{4}$ revealed by angle-resolved photoemission spectroscopy

• Razzoli, Elia Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland - Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, Switzerland
• Matt, Christian E. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland - Laboratory for Solid State Physics, ETH Zurich, Switzerland
• Sassa, Y. Swiss Light Source, Paul Scherrer Institute, Villigen PSI, Switzerland - Laboratory for Solid State Physics, ETH Zurich, Switzerland - Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
07.06.2017
Published in:
• Physical Review B. - 2017, vol. 95, no. 22, p. 224504
English Using angle-resolved photoemission spectroscopy it is revealed that in the vicinity of optimal doping the electronic structure of La2−xSrxCuO4 cuprate undergoes an electronic reconstruction associated with a wave vector qa=(π,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 qa=(π,0) vector, but not with qb=(0,π). We demonstrate that the absence of qb reconstruction is not due to the matrix-element effects in the photoemission process, which indicates the fourfold symmetry is broken in the system.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
• English
Classification
Physics