2002/09/30 by Hiroyuki Kimura, H. Kimura, Maiko Kofu +4 · 3 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.91.067002
4 pages, 4 figures
arxiv created 2003/03/19 · openalex publication_date 2003/08/05 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
Low-energy spin excitations of La1.85Sr0.15Cu_1\ensuremath-yZnyO4 were studied by neutron scattering. In y=0.004, the incommensurate magnetic peaks show a well-defined ``spin gap'' below Tc. The magnetic signals at \ensuremathω=3 meV decrease below Tc=27 K for y=0.008, also suggesting the gap opening. At lower temperatures, however, the signal increases again, implying a novel in-gap spin state. In y=0.017, the spin gap vanishes and elastic magnetic peaks appear. These results clarify that doped Zn impurities induce the novel in-gap state, which becomes larger and more static with increasing Zn.