1996/11/18 by Almut Schroeder, A. Schroeder, G. Aeppli +11
Materials Science · Physics and Astronomy · #FOS: Physical sciences #High voltage insulation and dielectric phenomena #Strongly Correlated Electrons (cond-mat.str-el) #Vacuum and Plasma Arcs #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/9611132
RevTeX, 5 postscript figures, Submitted the Physical Review Letters
arxiv created 1996/11/18 · openalex publication_date 1996/11/18 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Cold neutron spectroscopy was performed on CeNi1-xCuxSn to investigate how the magnetic gap in the 'Kondo insulator' CeNiSn is destroyed by temperature (T), chemical substitution (x), and external magnetic field. Upon doping, the spin gap collapses and magnetic Bragg peaks occur initially (x = 0.13) at the commensurate wave vectors Q = (0,m/2,l) (m,l integer) where the higher-energy (4.1 meV) gap is located for x = 0. A magnetic field smooths the sharp spin gap structure in both momentum and energy, while leaving the associated static susceptibility unchanged, as does raising T.