Anisotropic effect of a magnetic field on the neutron spin resonance in FeSe.

Autor: Chen T; Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA., Chen Y; Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA., Tam DW; Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA., Gao B; Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA., Qiu Y; NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA., Schneidewind A; Jülich Center for Neutron Sciences, Forschungszentrum Jülich GmbH, Outstation at MLZ, D-85747 Garching, Germany., Radelytskyi I; Jülich Center for Neutron Sciences, Forschungszentrum Jülich GmbH, Outstation at MLZ, D-85747 Garching, Germany., Prokes K; Helmholtz Zentrum Berlin für Materialien und Energie, 14109 Berlin, Germany., Chi S; Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., Matsuda M; Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., Broholm C; Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA.; NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA., Dai P; Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA.
Jazyk: angličtina
Zdroj: Physical review. B [Phys Rev B] 2020; Vol. 101 (14).
DOI: 10.1103/physrevb.101.140504
Abstrakt: We use inelastic neutron scattering to study the effect of a magnetic field on the neutron spin resonance ( E r = 3.6 meV) of superconducting FeSe ( T c = 9 K). While a field aligned along the in-plane direction broadens and suppresses the resonance, a c -axis aligned field does so much more efficiently, consistent with the anisotropic field-induced suppression of the superfluid density from the heat capacity measurements. These results suggest that the resonance in FeSe is associated with the superconducting electrons arising from orbital selective quasiparticle excitations between the hole and electron Fermi surfaces.
Databáze: MEDLINE