title: Comprehensive study of the spin-charge interplay in antiferromagnetic La(2-x)Sr(x)CuO4.
abstract: 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 La(2-x)Sr(x)CuO4. 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.
authors.affiliation: Department of Physics, Technion-Israel Institute of Technology, Haifa 32000, Israel.
authors.forename: Gil
authors.initials: G
authors.lastname: Drachuck
authors.affiliation: 1] Swiss Light Source, Paul Scherrer Institute, Villigen PSI CH-5232, Switzerland [2] Departement de Physique and Fribourg Center for Nanomaterials, University de Fribourg, Fribourg CH-1700, Switzerland.
authors.forename: Elia
authors.initials: E
authors.lastname: Razzoli
authors.affiliation: Department of Physics, Technion-Israel Institute of Technology, Haifa 32000, Israel.
authors.forename: Galina
authors.initials: G
authors.lastname: Bazalitski
authors.affiliation: Department of Physics, Technion-Israel Institute of Technology, Haifa 32000, Israel.
authors.forename: Amit
authors.initials: A
authors.lastname: Kanigel
authors.affiliation: Laboratory for Neutron Scattering, Paul Scherrer Institute, Villigen PSI CH-5232, Switzerland.
authors.forename: Christof
authors.initials: C
authors.lastname: Niedermayer
authors.affiliation: Swiss Light Source, Paul Scherrer Institute, Villigen PSI CH-5232, Switzerland.
authors.forename: Ming
authors.initials: M
authors.lastname: Shi
authors.affiliation: Department of Physics, Technion-Israel Institute of Technology, Haifa 32000, Israel.
authors.forename: Amit
authors.initials: A
authors.lastname: Keren
mesh_terms: D003300:Copper / Q000737:chemistry*; D003460:Crystallization; D004553:Electric Conductivity; D006358:Hot Temperature; D007811:Lanthanum / Q000737:chemistry*; D008280:Magnetics; D033363:Neutron Diffraction; D056951:Photoelectron Spectroscopy / Q000379:methods*; D053838:Scattering, Small Angle; D013324:Strontium / Q000737:chemistry*
chemical_list: D007811:Lanthanum; D003300:Copper; C030973:cupric oxide; D013324:Strontium