High pressure phase transition in metallic LaB6: Raman and X-ray diffraction studies

Pallavi Teredesai; D. V.S. Muthu; N. Chandrabhas; S. Meenakshi; V. Vijayakumar; P. Modak; R. S. Rao; B. K. Godwal; S. K. Sikka; A. K. Sood

doi:10.1016/j.ssc.2003.12.041

High pressure phase transition in metallic LaB₆: Raman and X-ray diffraction studies

Pallavi Teredesai, D. V.S. Muthu, N. Chandrabhas, S. Meenakshi, V. Vijayakumar, P. Modak, R. S. Rao, B. K. Godwal, S. K. Sikka, A. K. Sood

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

High pressure Raman and angle dispersive X-ray diffraction (ADXRD) measurements on the metallic hexaboride LaB₆ have been carried out upto the pressures of about 20 GPa. The subtle phase transition around 10 GPa indicated in Raman measurements is confirmed by ADXRD experiments to be a structural change from cubic to orthorhombic phase. Ab-initio electronic band structure calculations using full potential linear augmented plane wave method carried out as a function of pressure show that this transition is driven by the interception of Fermi level by electronic band minimum around the transition pressure.

Original language	English
Pages (from-to)	791-796
Number of pages	6
Journal	Solid State Communications
Volume	129
Issue number	12
DOIs	https://doi.org/10.1016/j.ssc.2003.12.041
State	Published - 1 Mar 2004
Externally published	Yes

Keywords

A. LaB
C. Raman scattering
C. X-ray diffraction
E. High pressure

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

Access to Document

10.1016/j.ssc.2003.12.041

Cite this

@article{dca395a952c146728d3880ab2e4e079c,

title = "High pressure phase transition in metallic LaB6: Raman and X-ray diffraction studies",

abstract = "High pressure Raman and angle dispersive X-ray diffraction (ADXRD) measurements on the metallic hexaboride LaB6 have been carried out upto the pressures of about 20 GPa. The subtle phase transition around 10 GPa indicated in Raman measurements is confirmed by ADXRD experiments to be a structural change from cubic to orthorhombic phase. Ab-initio electronic band structure calculations using full potential linear augmented plane wave method carried out as a function of pressure show that this transition is driven by the interception of Fermi level by electronic band minimum around the transition pressure.",

keywords = "A. LaB, C. Raman scattering, C. X-ray diffraction, E. High pressure",

author = "Pallavi Teredesai and Muthu, {D. V.S.} and N. Chandrabhas and S. Meenakshi and V. Vijayakumar and P. Modak and Rao, {R. S.} and Godwal, {B. K.} and Sikka, {S. K.} and Sood, {A. K.}",

note = "Funding Information: AKS thanks Dr A. Jayaraman for single crystals of LaB 6 , Department of Science and Technology, India for financial support and Dr. C.S. Sunder for initial characterization of the crystals. PVT thanks Council for Scientific and Industrial Research, India for financial assistance.",

year = "2004",

month = mar,

day = "1",

doi = "10.1016/j.ssc.2003.12.041",

language = "English",

volume = "129",

pages = "791--796",

journal = "Solid State Communications",

issn = "0038-1098",

publisher = "Elsevier Ltd.",

number = "12",

}

TY - JOUR

T1 - High pressure phase transition in metallic LaB6

T2 - Raman and X-ray diffraction studies

AU - Teredesai, Pallavi

AU - Muthu, D. V.S.

AU - Chandrabhas, N.

AU - Meenakshi, S.

AU - Vijayakumar, V.

AU - Modak, P.

AU - Rao, R. S.

AU - Godwal, B. K.

AU - Sikka, S. K.

AU - Sood, A. K.

N1 - Funding Information: AKS thanks Dr A. Jayaraman for single crystals of LaB 6 , Department of Science and Technology, India for financial support and Dr. C.S. Sunder for initial characterization of the crystals. PVT thanks Council for Scientific and Industrial Research, India for financial assistance.

PY - 2004/3/1

Y1 - 2004/3/1

N2 - High pressure Raman and angle dispersive X-ray diffraction (ADXRD) measurements on the metallic hexaboride LaB6 have been carried out upto the pressures of about 20 GPa. The subtle phase transition around 10 GPa indicated in Raman measurements is confirmed by ADXRD experiments to be a structural change from cubic to orthorhombic phase. Ab-initio electronic band structure calculations using full potential linear augmented plane wave method carried out as a function of pressure show that this transition is driven by the interception of Fermi level by electronic band minimum around the transition pressure.

AB - High pressure Raman and angle dispersive X-ray diffraction (ADXRD) measurements on the metallic hexaboride LaB6 have been carried out upto the pressures of about 20 GPa. The subtle phase transition around 10 GPa indicated in Raman measurements is confirmed by ADXRD experiments to be a structural change from cubic to orthorhombic phase. Ab-initio electronic band structure calculations using full potential linear augmented plane wave method carried out as a function of pressure show that this transition is driven by the interception of Fermi level by electronic band minimum around the transition pressure.

KW - A. LaB

KW - C. Raman scattering

KW - C. X-ray diffraction

KW - E. High pressure

UR - http://www.scopus.com/inward/record.url?scp=10744220987&partnerID=8YFLogxK

U2 - 10.1016/j.ssc.2003.12.041

DO - 10.1016/j.ssc.2003.12.041

M3 - Article

AN - SCOPUS:10744220987

SN - 0038-1098

VL - 129

SP - 791

EP - 796

JO - Solid State Communications

JF - Solid State Communications

IS - 12

ER -