Retreat from Stress: Rattling in a Planar Coordination

Koichiro Suekuni, Chul Ho Lee, Hiromi I. Tanaka, Eiji Nishibori, Atsushi Nakamura, Hidetaka Kasai, Hitoshi Mori, Hidetomo Usui, Masayuki Ochi, Takumi Hasegawa, Mitsutaka Nakamura, Seiko Ohira-Kawamura, Tatsuya Kikuchi, Koji Kaneko, Hirotaka Nishiate, Katsuaki Hashikuni, Yasufumi Kosaka, Kazuhiko Kuroki, Toshiro Takabatake

Research output: Contribution to journal › Article

Abstract

Thermoelectric devices convert heat flow to charge flow, providing electricity. Materials for highly efficient devices must satisfy conflicting requirements of high electrical conductivity and low thermal conductivity. Thermal conductivity in caged compounds is known to be suppressed by a large vibration of guest atoms, so-called rattling, which effectively scatters phonons. Here, the crystal structure and phonon dynamics of tetrahedrites (Cu,Zn)12(Sb,As)4S13 are studied. The results reveal that the Cu atoms in a planar coordination are rattling. In contrast to caged compounds, chemical pressure enlarges the amplitude of the rattling vibration in the tetrahedrites so that the rattling atom is squeezed out of the planar coordination. Furthermore, the rattling vibration shakes neighbors through lone pairs of the metalloids, Sb and As, which is responsible for the low thermal conductivity of tetrahedrites. These findings provide a new strategy for the development of highly efficient thermoelectric materials with planar coordination.

LanguageEnglish
Article number1706230
JournalAdvanced Materials
Volume30
Issue number13
DOIs
StatePublished - Mar 27 2018

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Thermoelectric equipment
Thermoelectricity
Chemical compounds
Phonons
Neutron scattering
Thermal conductivity
Crystal structure
X ray diffraction
Atoms
Metalloids
Electricity
Heat transfer

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Suekuni, K., Lee, C. H., Tanaka, H. I., Nishibori, E., Nakamura, A., Kasai, H., ... Takabatake, T. (2018). Retreat from Stress: Rattling in a Planar Coordination. DOI: 10.1002/adma.201706230

Retreat from Stress : Rattling in a Planar Coordination. / Suekuni, Koichiro; Lee, Chul Ho; Tanaka, Hiromi I.; Nishibori, Eiji; Nakamura, Atsushi; Kasai, Hidetaka; Mori, Hitoshi; Usui, Hidetomo; Ochi, Masayuki; Hasegawa, Takumi; Nakamura, Mitsutaka; Ohira-Kawamura, Seiko; Kikuchi, Tatsuya; Kaneko, Koji; Nishiate, Hirotaka; Hashikuni, Katsuaki; Kosaka, Yasufumi; Kuroki, Kazuhiko; Takabatake, Toshiro.

In: Advanced Materials, Vol. 30, No. 13, 1706230, 27.03.2018.

Research output: Contribution to journal › Article

Suekuni, K, Lee, CH, Tanaka, HI, Nishibori, E, Nakamura, A, Kasai, H, Mori, H, Usui, H, Ochi, M, Hasegawa, T, Nakamura, M, Ohira-Kawamura, S, Kikuchi, T, Kaneko, K, Nishiate, H, Hashikuni, K, Kosaka, Y, Kuroki, K & Takabatake, T 2018, 'Retreat from Stress: Rattling in a Planar Coordination' Advanced Materials, vol. 30, no. 13, 1706230. DOI: 10.1002/adma.201706230
Suekuni K, Lee CH, Tanaka HI, Nishibori E, Nakamura A, Kasai H et al. Retreat from Stress: Rattling in a Planar Coordination. Advanced Materials. 2018 Mar 27;30(13). 1706230. Available from, DOI: 10.1002/adma.201706230
Suekuni, Koichiro ; Lee, Chul Ho ; Tanaka, Hiromi I. ; Nishibori, Eiji ; Nakamura, Atsushi ; Kasai, Hidetaka ; Mori, Hitoshi ; Usui, Hidetomo ; Ochi, Masayuki ; Hasegawa, Takumi ; Nakamura, Mitsutaka ; Ohira-Kawamura, Seiko ; Kikuchi, Tatsuya ; Kaneko, Koji ; Nishiate, Hirotaka ; Hashikuni, Katsuaki ; Kosaka, Yasufumi ; Kuroki, Kazuhiko ; Takabatake, Toshiro. / Retreat from Stress : Rattling in a Planar Coordination. In: Advanced Materials. 2018 ; Vol. 30, No. 13.
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