Large magneto-Thermopower in MnGe with topological spin texture

Y. Fujishiro, N. Kanazawa, T. Shimojima, A. Nakamura, K. Ishizaka, T. Koretsune, R. Arita, A. Miyake, H. Mitamura, Kazuto Akiba, M. Tokunaga, J. Shiogai, S. Kimura, S. Awaji, A. Tsukazaki, A. Kikkawa, Y. Taguchi, Y. Tokura

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Quantum states characterized by nontrivial topology produce interesting electrodynamics and versatile electronic functionalities. One source for such remarkable phenomena is emergent electromagnetic field, which is the outcome of interplay between topological spin structures with scalar spin chirality and conduction electrons. However, it has scarcely been exploited for emergent function related to heat-electricity conversion. Here we report an unusually enhanced thermopower by application of magnetic field in MnGe hosting topological spin textures. By considering all conceivable origins through quantitative investigations of electronic structures and properties, a possible origin of large magneto-Thermopower is assigned to the strong energy dependence of charge-Transport lifetime caused by unconventional carrier scattering via the dynamics of emergent magnetic field. Furthermore, highmagnetic- field measurements corroborate the presence of residual magnetic fluctuations even in the nominally ferromagnetic region, leading to a subsisting behavior of field-enhanced thermopower. The present finding may pave a way for thermoelectric function of topological magnets.

Original languageEnglish
Article number408
JournalNature Communications
Volume9
Issue number1
DOIs
Publication statusPublished - Dec 1 2018
Externally publishedYes

Fingerprint

Thermoelectric power
Magnetic Fields
textures
Textures
Electricity
Electromagnetic Fields
Magnets
Magnetic fields
Hot Temperature
Chirality
Electrodynamics
Electrons
electricity
chirality
magnetic fields
electrodynamics
Electronic properties
conduction electrons
Electromagnetic fields
Electronic structure

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Fujishiro, Y., Kanazawa, N., Shimojima, T., Nakamura, A., Ishizaka, K., Koretsune, T., ... Tokura, Y. (2018). Large magneto-Thermopower in MnGe with topological spin texture. Nature Communications, 9(1), [408]. https://doi.org/10.1038/s41467-018-02857-1

Large magneto-Thermopower in MnGe with topological spin texture. / Fujishiro, Y.; Kanazawa, N.; Shimojima, T.; Nakamura, A.; Ishizaka, K.; Koretsune, T.; Arita, R.; Miyake, A.; Mitamura, H.; Akiba, Kazuto; Tokunaga, M.; Shiogai, J.; Kimura, S.; Awaji, S.; Tsukazaki, A.; Kikkawa, A.; Taguchi, Y.; Tokura, Y.

In: Nature Communications, Vol. 9, No. 1, 408, 01.12.2018.

Research output: Contribution to journalArticle

Fujishiro, Y, Kanazawa, N, Shimojima, T, Nakamura, A, Ishizaka, K, Koretsune, T, Arita, R, Miyake, A, Mitamura, H, Akiba, K, Tokunaga, M, Shiogai, J, Kimura, S, Awaji, S, Tsukazaki, A, Kikkawa, A, Taguchi, Y & Tokura, Y 2018, 'Large magneto-Thermopower in MnGe with topological spin texture', Nature Communications, vol. 9, no. 1, 408. https://doi.org/10.1038/s41467-018-02857-1
Fujishiro Y, Kanazawa N, Shimojima T, Nakamura A, Ishizaka K, Koretsune T et al. Large magneto-Thermopower in MnGe with topological spin texture. Nature Communications. 2018 Dec 1;9(1). 408. https://doi.org/10.1038/s41467-018-02857-1
Fujishiro, Y. ; Kanazawa, N. ; Shimojima, T. ; Nakamura, A. ; Ishizaka, K. ; Koretsune, T. ; Arita, R. ; Miyake, A. ; Mitamura, H. ; Akiba, Kazuto ; Tokunaga, M. ; Shiogai, J. ; Kimura, S. ; Awaji, S. ; Tsukazaki, A. ; Kikkawa, A. ; Taguchi, Y. ; Tokura, Y. / Large magneto-Thermopower in MnGe with topological spin texture. In: Nature Communications. 2018 ; Vol. 9, No. 1.
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