Topological phase transition and thermal Hall effect in kagome ferromagnets

Fengjun Zhuo; Hang Li; Aurélien Manchon

Topological phase transition and thermal Hall effect in kagome ferromagnets

Fengjun Zhuo, Hang Li, Aurélien Manchon

Research output: Contribution to journal › Article › peer-review

Abstract

We investigate a new mechanism for phase transitions between topological magnon phases on the breathing kagome lattice ferromagnets with Dzyaloshinskii-Moriya interaction, which is induced by the lattice deformation. With the linear spin-wave theory, we calculate the magnonic Chern number, topological phase diagram and magnon thermal Hall conductivity at low temperature with tunable modulated exchange interactions due to the lattice deformation. We show that the modulated exchange interactions and Dzyaloshinskii-Moriya interaction strength determine the band topology of magnons. We find a sign reversal of the thermal Hall conductivity during topological phase transitions explained in terms of topological edge modes and their propagation directions. We also discuss candidate materials to realize our ideas.

Original language	English (US)
Journal	Physical Review B
State	Published - 2021

Bibliographical note

KAUST Repository Item: Exported on 2021-10-14
Acknowledgements: We would like to acknowledge useful discussions with Xiukun Hua, Jihuan Guan and S. Ghosh. F.Z. was supported by King Abdullah University of Science and Technology (KAUST). A.M. acknowledges support from the Excellence Initiative of Aix-Marseille Université—A*Midex, a French "Investissements d’Avenir" program. H.L. acknowledge the support from Henan University (No. CJ3050A0240050)
and National Natural Science Foundation of China (No. 11804078).

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https://repository.kaust.edu.sa/bitstream/10754/672821/1/Topological%20phase%20transition%20and%20thermal%20Hall%20effect%20in%20kagome%20ferromagnets.pdf

Cite this

@article{af7811342502495da17581fd41a662ec,

title = "Topological phase transition and thermal Hall effect in kagome ferromagnets",

abstract = "We investigate a new mechanism for phase transitions between topological magnon phases on the breathing kagome lattice ferromagnets with Dzyaloshinskii-Moriya interaction, which is induced by the lattice deformation. With the linear spin-wave theory, we calculate the magnonic Chern number, topological phase diagram and magnon thermal Hall conductivity at low temperature with tunable modulated exchange interactions due to the lattice deformation. We show that the modulated exchange interactions and Dzyaloshinskii-Moriya interaction strength determine the band topology of magnons. We find a sign reversal of the thermal Hall conductivity during topological phase transitions explained in terms of topological edge modes and their propagation directions. We also discuss candidate materials to realize our ideas.",

author = "Fengjun Zhuo and Hang Li and Aur{\'e}lien Manchon",

note = "KAUST Repository Item: Exported on 2021-10-14 Acknowledgements: We would like to acknowledge useful discussions with Xiukun Hua, Jihuan Guan and S. Ghosh. F.Z. was supported by King Abdullah University of Science and Technology (KAUST). A.M. acknowledges support from the Excellence Initiative of Aix-Marseille Universit{\'e}—A*Midex, a French {"}Investissements d{\textquoteright}Avenir{"} program. H.L. acknowledge the support from Henan University (No. CJ3050A0240050) and National Natural Science Foundation of China (No. 11804078).",

year = "2021",

language = "English (US)",

journal = "Physical Review B",

}

TY - JOUR

T1 - Topological phase transition and thermal Hall effect in kagome ferromagnets

AU - Zhuo, Fengjun

AU - Li, Hang

AU - Manchon, Aurélien

N1 - KAUST Repository Item: Exported on 2021-10-14 Acknowledgements: We would like to acknowledge useful discussions with Xiukun Hua, Jihuan Guan and S. Ghosh. F.Z. was supported by King Abdullah University of Science and Technology (KAUST). A.M. acknowledges support from the Excellence Initiative of Aix-Marseille Université—A*Midex, a French "Investissements d’Avenir" program. H.L. acknowledge the support from Henan University (No. CJ3050A0240050) and National Natural Science Foundation of China (No. 11804078).

PY - 2021

Y1 - 2021

N2 - We investigate a new mechanism for phase transitions between topological magnon phases on the breathing kagome lattice ferromagnets with Dzyaloshinskii-Moriya interaction, which is induced by the lattice deformation. With the linear spin-wave theory, we calculate the magnonic Chern number, topological phase diagram and magnon thermal Hall conductivity at low temperature with tunable modulated exchange interactions due to the lattice deformation. We show that the modulated exchange interactions and Dzyaloshinskii-Moriya interaction strength determine the band topology of magnons. We find a sign reversal of the thermal Hall conductivity during topological phase transitions explained in terms of topological edge modes and their propagation directions. We also discuss candidate materials to realize our ideas.

AB - We investigate a new mechanism for phase transitions between topological magnon phases on the breathing kagome lattice ferromagnets with Dzyaloshinskii-Moriya interaction, which is induced by the lattice deformation. With the linear spin-wave theory, we calculate the magnonic Chern number, topological phase diagram and magnon thermal Hall conductivity at low temperature with tunable modulated exchange interactions due to the lattice deformation. We show that the modulated exchange interactions and Dzyaloshinskii-Moriya interaction strength determine the band topology of magnons. We find a sign reversal of the thermal Hall conductivity during topological phase transitions explained in terms of topological edge modes and their propagation directions. We also discuss candidate materials to realize our ideas.

UR - http://hdl.handle.net/10754/672821

M3 - Article

JO - Physical Review B

JF - Physical Review B

ER -

Topological phase transition and thermal Hall effect in kagome ferromagnets

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