Journal article

Comprehensive study of the spin-charge interplay in antiferromagnetic La2−xSrxCuO₄

  • Drachuck, Gil Department of Physics, Technion—Israel Institute of Technology, Haifa, Israel
  • Razzoli, Elia Swiss Light Source, Paul Scherrer Institute, Villigen, Switzerland - Departement de Physique and Fribourg Center for Nanomaterials, University de Fribourg, Switzerland
  • Bazalitski, Galina Department of Physics, Technion—Israel Institute of Technology, Haifa, Israel
  • Kanigel, Amit Department of Physics, Technion—Israel Institute of Technology, Haifa, Israel
  • Niedermayer, Christof Laboratory for Neutron Scattering, Paul Scherrer Institute, Villigen, Switzerland
  • Shi, Ming Swiss Light Source, Paul Scherrer Institute, Villigen, Switzerland
  • Keren, Amit Department of Physics, Technion—Israel Institute of Technology, Haifa, Israel
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    27.02.2014
Published in:
  • Nature Communications. - 2014, vol. 5
English The origin of the pseudogap and its relationship with superconductivity in the cuprates remains vague. In particular, the interplay between the pseudogap and magnetism is mysterious. Here we investigate the newly discovered nodal gap in hole-doped cuprates using a combination of three experimental techniques applied to one, custom made, single crystal. The crystal is an antiferromagnetic La2−xSrxCuO₄ with x=1.92%. We perform angle-resolved photoemission spectroscopy measurements as a function of temperature and find: quasi-particle peaks, Fermi surface, anti-nodal gap and below 45 K a nodal gap. Muon spin rotation measurements ensure that the sample is indeed antiferromagnetic and that the doping is close, but below, the spin-glass phase boundary. We also perform elastic neutron scattering measurements and determine the thermal evolution of the commensurate and incommensurate magnetic order, where we find that a nodal gap opens well below the commensurate ordering at 140 K, and close to the incommensurate spin density wave ordering temperature of 30 K.
Faculty
Faculté des sciences
Department
Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/303734
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