Enormous electron-electron scattering in the filled-cage cubic compound B a10 T i24 B i39

Fei Han, Jin Ke Bao, Christos D. Malliakas, Mihai Sturza, Yongping Du, Duck Young Chung, Xiangang Wan, Mercouri G. Kanatzidis

Research output: Contribution to journalArticle

Abstract

The cubic intermetallic compound Ba10Ti24Bi39 has a Ba6Bi16 polyhedral cage with a Bi guest atom encapsulated inside. The compound can be formulated as Ba5Ti12Bi19+x when x signifies the extra Bi atoms filling cages. It crystallizes in a complex noncentrosymmetric cubic structure in space group P-43m with cell parameter a=12.6787(4)Å. The guest Bi atoms distribute diffusely in the cages and seem to play a role in stabilizing the crystal structure. The magnetic susceptibility of this compound shows a weak temperature dependence with a positive slope coefficient. The charge transport properties as a function of temperature exhibit two competing components which are in charge of positive and negative magnetoresistances. Electronic band-structure calculations reveal the complex multiband hybridization of Ti/Bi orbitals near the Fermi surface, which may play a role in the enormous electron-electron scattering in this material evidenced by the large Kadowaki-Woods ratio.

Original languageEnglish
Article number105001
JournalPhysical Review Materials
Volume3
Issue number10
DOIs
Publication statusPublished - Oct 7 2019

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Electron scattering
electron scattering
Atoms
Electrons
atoms
electrons
Fermi surface
Magnetoresistance
Magnetic susceptibility
Band structure
Transport properties
Fermi surfaces
Intermetallics
intermetallics
Charge transfer
Wood
Crystal structure
transport properties
slopes
magnetic permeability

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

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Enormous electron-electron scattering in the filled-cage cubic compound B a10 T i24 B i39. / Han, Fei; Bao, Jin Ke; Malliakas, Christos D.; Sturza, Mihai; Du, Yongping; Chung, Duck Young; Wan, Xiangang; Kanatzidis, Mercouri G.

In: Physical Review Materials, Vol. 3, No. 10, 105001, 07.10.2019.

Research output: Contribution to journalArticle

Han, Fei ; Bao, Jin Ke ; Malliakas, Christos D. ; Sturza, Mihai ; Du, Yongping ; Chung, Duck Young ; Wan, Xiangang ; Kanatzidis, Mercouri G. / Enormous electron-electron scattering in the filled-cage cubic compound B a10 T i24 B i39. In: Physical Review Materials. 2019 ; Vol. 3, No. 10.
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