Spin density wave and possible Fulde-Ferrell-Larkin-Ovchinnikov states in CeCoIn5

ORAL

Abstract

We examine interplay between spin density wave (SDW) and the putative Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state in CeCoIn5. We use thermal conductivity measurement along a-axis in magnetic field applied at various angles away from the c-axis within the bc plane of this tetragonal compound. We compare our results to those of our theoretical model which shows that SDW state in CeCoIn5 is stabilized when the field is directed close to the ab plane. The SDW phase disappears when the field is rotated away from the ab plane.When the field is rotated toward the c axis, the FFLO state emerges while the SDW phase disappears. As a function of field, we observed the reduction of thermal conductivity for field close to the ab plane and the enhancement of thermal conductivity when field is close to the c axis, consistent with the theoretical expectations of additional contribution to the heat transpot from the FFLO nodal planes.

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Presenters

  • Roman Movshovich

    Los Alamos National Laboratory, Condensed Matter and Magnet Sciences, Los Alamos National Laboratory

Authors

  • Duk Young Kim

    Institute for Basic Science, Institue of Basic Science, SKKU, South Korea

  • Shizeng Lin

    Los Alamos National Laboratory, Theoretical Division, Los Alamos National Laboratory

  • Eric Bauer

    Los Alamos National Laboratory, Los Alamos, NM 87545, USA, Los Alamos National Laboratory, MPA-CMMS, Los Alamos National Laboratory, Los Alamos, USA, MPA-CMMS, Los Alamos National Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico, USA, Los Alamos National Labs

  • Filip Ronning

    Los Alamos National Laboratory, Los Alamos, NM 87545, USA, Los Alamos National Laboratory, MPA-CMMS, Los Alamos National Laboratory, Los Alamos, USA, MPA-CMMS, Los Alamos National Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico, USA, Los Alamos National Labs

  • Roman Movshovich

    Los Alamos National Laboratory, Condensed Matter and Magnet Sciences, Los Alamos National Laboratory