Tunable charge carriers and thermoelectricity of single-crystal Ba 8Ga16Sn30

M. A. Avila, D. Huo, T. Sakata, K. Suekuni, T. Takabatake

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

We have grown single crystals of the type-VIII intermetallic clathrate Ba8Ga16Sn30 from both Sn and Ga fluxes, evaluated their compositions through electron microprobe analysis and studied their transport properties through measurements on the temperature dependent resistivity, thermopower and Hall coefficient. Crystals grown in Sn flux show n-type carriers and those from Ga flux show p-type carriers, whereas all measured compositions remain very close to the stoichiometric 8:16:30 proportion of Ba:Ga:Sn, expected from charge-balance principles. Our results indicate a very high sensitivity of the charge carrier nature and density with respect to the growth conditions, leading to relevant differences in transport properties which point to the importance of tuning this material for optimal thermoelectric performance.

Original languageEnglish
Pages (from-to)1585-1592
Number of pages8
JournalJournal of Physics Condensed Matter
Volume18
Issue number5
DOIs
Publication statusPublished - Feb 8 2006

Fingerprint

Thermoelectricity
thermoelectricity
Charge carriers
charge carriers
Single crystals
Fluxes
Transport properties
single crystals
transport properties
clathrates
Thermoelectric power
Electron probe microanalysis
coefficients
Chemical analysis
Intermetallics
intermetallics
Hall effect
proportion
Tuning
tuning

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Tunable charge carriers and thermoelectricity of single-crystal Ba 8Ga16Sn30. / Avila, M. A.; Huo, D.; Sakata, T.; Suekuni, K.; Takabatake, T.

In: Journal of Physics Condensed Matter, Vol. 18, No. 5, 08.02.2006, p. 1585-1592.

Research output: Contribution to journalArticle

Avila, M. A. ; Huo, D. ; Sakata, T. ; Suekuni, K. ; Takabatake, T. / Tunable charge carriers and thermoelectricity of single-crystal Ba 8Ga16Sn30. In: Journal of Physics Condensed Matter. 2006 ; Vol. 18, No. 5. pp. 1585-1592.
@article{e62eb9e28ece4856b415dea06c41090f,
title = "Tunable charge carriers and thermoelectricity of single-crystal Ba 8Ga16Sn30",
abstract = "We have grown single crystals of the type-VIII intermetallic clathrate Ba8Ga16Sn30 from both Sn and Ga fluxes, evaluated their compositions through electron microprobe analysis and studied their transport properties through measurements on the temperature dependent resistivity, thermopower and Hall coefficient. Crystals grown in Sn flux show n-type carriers and those from Ga flux show p-type carriers, whereas all measured compositions remain very close to the stoichiometric 8:16:30 proportion of Ba:Ga:Sn, expected from charge-balance principles. Our results indicate a very high sensitivity of the charge carrier nature and density with respect to the growth conditions, leading to relevant differences in transport properties which point to the importance of tuning this material for optimal thermoelectric performance.",
author = "Avila, {M. A.} and D. Huo and T. Sakata and K. Suekuni and T. Takabatake",
year = "2006",
month = "2",
day = "8",
doi = "10.1088/0953-8984/18/5/011",
language = "English",
volume = "18",
pages = "1585--1592",
journal = "Journal of Physics Condensed Matter",
issn = "0953-8984",
publisher = "IOP Publishing Ltd.",
number = "5",

}

TY - JOUR

T1 - Tunable charge carriers and thermoelectricity of single-crystal Ba 8Ga16Sn30

AU - Avila, M. A.

AU - Huo, D.

AU - Sakata, T.

AU - Suekuni, K.

AU - Takabatake, T.

PY - 2006/2/8

Y1 - 2006/2/8

N2 - We have grown single crystals of the type-VIII intermetallic clathrate Ba8Ga16Sn30 from both Sn and Ga fluxes, evaluated their compositions through electron microprobe analysis and studied their transport properties through measurements on the temperature dependent resistivity, thermopower and Hall coefficient. Crystals grown in Sn flux show n-type carriers and those from Ga flux show p-type carriers, whereas all measured compositions remain very close to the stoichiometric 8:16:30 proportion of Ba:Ga:Sn, expected from charge-balance principles. Our results indicate a very high sensitivity of the charge carrier nature and density with respect to the growth conditions, leading to relevant differences in transport properties which point to the importance of tuning this material for optimal thermoelectric performance.

AB - We have grown single crystals of the type-VIII intermetallic clathrate Ba8Ga16Sn30 from both Sn and Ga fluxes, evaluated their compositions through electron microprobe analysis and studied their transport properties through measurements on the temperature dependent resistivity, thermopower and Hall coefficient. Crystals grown in Sn flux show n-type carriers and those from Ga flux show p-type carriers, whereas all measured compositions remain very close to the stoichiometric 8:16:30 proportion of Ba:Ga:Sn, expected from charge-balance principles. Our results indicate a very high sensitivity of the charge carrier nature and density with respect to the growth conditions, leading to relevant differences in transport properties which point to the importance of tuning this material for optimal thermoelectric performance.

UR - http://www.scopus.com/inward/record.url?scp=31144438153&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=31144438153&partnerID=8YFLogxK

U2 - 10.1088/0953-8984/18/5/011

DO - 10.1088/0953-8984/18/5/011

M3 - Article

AN - SCOPUS:31144438153

VL - 18

SP - 1585

EP - 1592

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

SN - 0953-8984

IS - 5

ER -