Distortion and charge density wave in the Ga square net coupled to the site occupancy wave in YCo0.88Ga3Ge

Danielle L. Gray, Melanie C. Francisco, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

YCo0.88Ga3Ge has an incommensurately modulated structure that was solved with (3 + 1)D superspace techniques. YCo 0.88Ga3Ge crystallizes in the orthorhombic superspace group Immm(α00)00s with unit cell constants of a = 4.1639(4), b = 4.1639(4), c = 23.541(2) Å and a modulation vector of q = 0.3200(4)a* at 293 K. The incommensurate modulation, which creates a very large supercell (∼25 fold), arises from a charge density wave (CDW) in the square net of Ga atoms that is coupled with a site occupancy wave (SOW) of Co atoms. The distorted Ga net features polygallide ribbons, chains, as well as single atoms. Temperature dependent crystallographic studies of the structure from 100-500 K indicate that the CDW is "locked in". Electrical conductivity and thermopower measurements in the temperature range of 300-500 K show that YCo0.88Ga3Ge is a poor metal.

Original languageEnglish
Pages (from-to)7243-7248
Number of pages6
JournalInorganic Chemistry
Volume47
Issue number16
DOIs
Publication statusPublished - Aug 18 2008

Fingerprint

Charge density waves
Atoms
Modulation
atoms
modulation
Thermoelectric power
ribbons
Metals
Temperature
electrical resistivity
temperature
cells
metals

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

Distortion and charge density wave in the Ga square net coupled to the site occupancy wave in YCo0.88Ga3Ge. / Gray, Danielle L.; Francisco, Melanie C.; Kanatzidis, Mercouri G.

In: Inorganic Chemistry, Vol. 47, No. 16, 18.08.2008, p. 7243-7248.

Research output: Contribution to journalArticle

@article{e2a078af4d2642279aee3450f4f2661f,
title = "Distortion and charge density wave in the Ga square net coupled to the site occupancy wave in YCo0.88Ga3Ge",
abstract = "YCo0.88Ga3Ge has an incommensurately modulated structure that was solved with (3 + 1)D superspace techniques. YCo 0.88Ga3Ge crystallizes in the orthorhombic superspace group Immm(α00)00s with unit cell constants of a = 4.1639(4), b = 4.1639(4), c = 23.541(2) {\AA} and a modulation vector of q = 0.3200(4)a* at 293 K. The incommensurate modulation, which creates a very large supercell (∼25 fold), arises from a charge density wave (CDW) in the square net of Ga atoms that is coupled with a site occupancy wave (SOW) of Co atoms. The distorted Ga net features polygallide ribbons, chains, as well as single atoms. Temperature dependent crystallographic studies of the structure from 100-500 K indicate that the CDW is {"}locked in{"}. Electrical conductivity and thermopower measurements in the temperature range of 300-500 K show that YCo0.88Ga3Ge is a poor metal.",
author = "Gray, {Danielle L.} and Francisco, {Melanie C.} and Kanatzidis, {Mercouri G}",
year = "2008",
month = "8",
day = "18",
doi = "10.1021/ic801080f",
language = "English",
volume = "47",
pages = "7243--7248",
journal = "Inorganic Chemistry",
issn = "0020-1669",
publisher = "American Chemical Society",
number = "16",

}

TY - JOUR

T1 - Distortion and charge density wave in the Ga square net coupled to the site occupancy wave in YCo0.88Ga3Ge

AU - Gray, Danielle L.

AU - Francisco, Melanie C.

AU - Kanatzidis, Mercouri G

PY - 2008/8/18

Y1 - 2008/8/18

N2 - YCo0.88Ga3Ge has an incommensurately modulated structure that was solved with (3 + 1)D superspace techniques. YCo 0.88Ga3Ge crystallizes in the orthorhombic superspace group Immm(α00)00s with unit cell constants of a = 4.1639(4), b = 4.1639(4), c = 23.541(2) Å and a modulation vector of q = 0.3200(4)a* at 293 K. The incommensurate modulation, which creates a very large supercell (∼25 fold), arises from a charge density wave (CDW) in the square net of Ga atoms that is coupled with a site occupancy wave (SOW) of Co atoms. The distorted Ga net features polygallide ribbons, chains, as well as single atoms. Temperature dependent crystallographic studies of the structure from 100-500 K indicate that the CDW is "locked in". Electrical conductivity and thermopower measurements in the temperature range of 300-500 K show that YCo0.88Ga3Ge is a poor metal.

AB - YCo0.88Ga3Ge has an incommensurately modulated structure that was solved with (3 + 1)D superspace techniques. YCo 0.88Ga3Ge crystallizes in the orthorhombic superspace group Immm(α00)00s with unit cell constants of a = 4.1639(4), b = 4.1639(4), c = 23.541(2) Å and a modulation vector of q = 0.3200(4)a* at 293 K. The incommensurate modulation, which creates a very large supercell (∼25 fold), arises from a charge density wave (CDW) in the square net of Ga atoms that is coupled with a site occupancy wave (SOW) of Co atoms. The distorted Ga net features polygallide ribbons, chains, as well as single atoms. Temperature dependent crystallographic studies of the structure from 100-500 K indicate that the CDW is "locked in". Electrical conductivity and thermopower measurements in the temperature range of 300-500 K show that YCo0.88Ga3Ge is a poor metal.

UR - http://www.scopus.com/inward/record.url?scp=50449096588&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=50449096588&partnerID=8YFLogxK

U2 - 10.1021/ic801080f

DO - 10.1021/ic801080f

M3 - Article

VL - 47

SP - 7243

EP - 7248

JO - Inorganic Chemistry

JF - Inorganic Chemistry

SN - 0020-1669

IS - 16

ER -