Home

Spin-charge interplay in antiferromagnetic LSCO studied by the muons, neutrons, and ARPES techniques


  Gil Drachuck [1]  ,  Elia Razzoli [2] [3]  ,  Galina Bazalitski [1]  ,  Amit Kanigel [1]  ,  Christof Niedermayer [2]  ,  Ming Shi [2]  ,  Amit Keren [1]  
 [1] Department of Physics, Technion - Israel Institute of Technology, Haifa, 32000, Israel
[2] Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
[3] University de Fribourg, CH-1700 Fribourg, Switzerland

We performed temperature dependent angle resolved photo emission Spectroscopy (ARPES) measurements on an antiferromagnetic (AFM) LSCO sample with x=1.92. We find: quasiparticle peaks, Fermi surface, antinodal gap, and below 45K a nodal gap. Muon spin rotation measurements ensured that the sample is AFM and that the doping is close, but below, the spin glass phase boundary. In addition, we performed elastic neutron scattering measurements on the same sample, and determined the thermal evolution of the commensurate and incommensurate magnetic order. Our major finding is that nodal gap opens at a temperature well below the commensurate ordering at 140K, and close to the incommensurate ordering temperature of 30K.