Magnonic thermal conductivity of multiferroic materials with spin cycloids

ORAL

Abstract

Multiferroic materials, which exhibit multiple ferroic properties, show intriguing behaviors due to the interplay of different orders. In this work, we investigate magnon excitations and transport in spin cycloid structures using a multiferroic Hamiltonian with antiferromagnetic order. We identify the ground state and examine distinct in-plane and out-of-plane magnon modes with anisotropic dispersion relations. By employing the Boltzmann transport equation, we analyze the magnonic thermal conductivity of multiferroics with spin cycloids and discuss its low-temperature anisotropic behaviors. Our work leads us to envision that spin-textured multiferroics may serve as a fertile ground to look for novel thermal and spin transport with the rich interplay of quasiparticles therein such as magnons, phonons, and ferrons.

*H.W.P. and S.K.K. were supported by Brain Pool Plus Program through the National Research Foundation of Korea funded by the Ministry of Science and ICT (NRF-2020H1D3A2A03099291), by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2021R1C1C1006273), and by the National Research Foundation of Korea funded by the Korea Government via the SRC Center for Quantum Coherence in Condensed Matter (NRF-RS-2023-00207732). P.M., R.R., and M.R. acknowledge funding from the Army Research Office under the ETHOS MURI via cooperative agreement W911NF-21-2-0162. S.H acknowledges the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division under Contract No. DE-AC02-05-CH11231 (Codesign of Ultra-Low-Voltage Beyond CMOS Microelectronics) for the development of materials for low-power microelectronics. J.Í.-G. acknowledges the financial support from the Luxembourg National Research Fund through grant C21/MS/15799044/FERRODYNAMICS.

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Presenters

  • Hyeon Woo Park

    • KAIST

Authors

  • Hyeon Woo Park

    • KAIST

  • Peter Meisenheimer

    • University of California, Berkeley

  • Maya Ramesh

    • Cornell University
    • Cornell

  • Sajid Husain

    • Lawrence Berkeley National Laboratory
    • University of California, Berkeley.
    • University of Calfornia Berkeley

  • Isaac A Harris

    • University of California, Berkeley

  • Jorge Iniguez-Gonzalez

    • Luxembourg Institute of Science and Technology
    • Luxembourg Inst of Science and Technology

  • Zhi (Jackie) Yao

    • Lawrence Berkeley National Laboratory

  • Ramamoorthy Ramesh

    • Rice University

  • Se Kwon Kim

    • KAIST
    • Korea Advanced Institute of Science and Technology