Characteristic Fermi surfaces and charge density wave in SrAl4 and related compounds with the BaAl4-type tetragonal structure

Ai Nakamura, Taro Uejo, Hisatomo Harima, Shingo Araki, Tatsuo Kobayashi, Miho Nakashima, Yasushi Amako, Masato Hedo, Takao Nakama, Yoshichika Onuki

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We succeeded in growing single crystals of SrAl4 and related compounds with the BaAl4-type tetragonal structure by the self-flux method, and measured the electrical resistivity, magnetic susceptibility, Hall coefficient, thermoelectric power, and de Haas-van Alphen (dHvA) effect. A plausible characteristic feature of the charge density wave (CDW) was observed below TCDW = 243 K in SrAl4. We also studied an effect of pressure on the electronic state in SrAl4 by measuring the electrical resistivity and thermoelectric power. TCDW is found to decrease with increasing pressure, with a rate of dTCDW/dP = -12.5 K/GPa. To clarify the Fermi surface nesting, we studied the Fermi surface in SrAl4, which is found to be different from the Fermi surfaces of the similar compounds SrGa4, BaGa4, and BaAl4 without CDW. The Fermi surfaces in these compounds were determined from the dHvA experiments, together with the energy band calculations.

Original languageEnglish
Pages (from-to)290-299
Number of pages10
JournalJournal of Alloys and Compounds
Volume654
DOIs
Publication statusPublished - Jan 5 2016

Fingerprint

Charge density waves
Fermi surface
Thermoelectric power
Electronic states
Magnetic susceptibility
Band structure
Single crystals
Fluxes
Experiments

Keywords

  • Alkaline-earth metal compounds
  • Charge density wave (CDW)
  • Crystal growth
  • de Haas-van Alphen effect
  • Electrical resistivity
  • Fermi surfaces

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

Cite this

Characteristic Fermi surfaces and charge density wave in SrAl4 and related compounds with the BaAl4-type tetragonal structure. / Nakamura, Ai; Uejo, Taro; Harima, Hisatomo; Araki, Shingo; Kobayashi, Tatsuo; Nakashima, Miho; Amako, Yasushi; Hedo, Masato; Nakama, Takao; Onuki, Yoshichika.

In: Journal of Alloys and Compounds, Vol. 654, 05.01.2016, p. 290-299.

Research output: Contribution to journalArticle

Nakamura, Ai ; Uejo, Taro ; Harima, Hisatomo ; Araki, Shingo ; Kobayashi, Tatsuo ; Nakashima, Miho ; Amako, Yasushi ; Hedo, Masato ; Nakama, Takao ; Onuki, Yoshichika. / Characteristic Fermi surfaces and charge density wave in SrAl4 and related compounds with the BaAl4-type tetragonal structure. In: Journal of Alloys and Compounds. 2016 ; Vol. 654. pp. 290-299.
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AU - Uejo, Taro

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AU - Kobayashi, Tatsuo

AU - Nakashima, Miho

AU - Amako, Yasushi

AU - Hedo, Masato

AU - Nakama, Takao

AU - Onuki, Yoshichika

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