As-As dimerization, Fermi surfaces and the anomalous electrical transport properties of UAsSe and ThAsSe

Ray L. Withers; Herman J.P. van Midden; Albert Prodan; P. A. Midgley; J. Schoenes; R. Vincent

doi:10.1016/j.jssc.2006.04.016

As-As dimerization, Fermi surfaces and the anomalous electrical transport properties of UAsSe and ThAsSe

Ray L. Withers^*, Herman J.P. van Midden, Albert Prodan, P. A. Midgley, J. Schoenes, R. Vincent

^*Corresponding author for this work

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

3 Citations (Scopus)

Abstract

A temperature dependent electron diffraction study has been carried out on UAsSe to search for evidence of As-As dimerization at low temperature. A highly structured characteristic diffuse intensity distribution, closely related to that recently reported for ThAsSe, has been observed at low temperature and interpreted in terms of a gradual charge density wave type phase transition upon lowering of temperature involving disordered As-As dimerization within (001) planes. Plausible models of the proposed As-As dimerization have been obtained using a group theoretical approach. Electronic band structure calculations of ThAsSe and UAsSe have been used to search for potential Fermi surface nesting wave-vectors. The results are in good agreement with the experimentally observed diffuse intensity distributions in both cases.

Original language	English
Pages (from-to)	2190-2198
Number of pages	9
Journal	Journal of Solid State Chemistry
Volume	179
Issue number	7
DOIs	https://doi.org/10.1016/j.jssc.2006.04.016
Publication status	Published - Jul 2006

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10.1016/j.jssc.2006.04.016

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title = "As-As dimerization, Fermi surfaces and the anomalous electrical transport properties of UAsSe and ThAsSe",

abstract = "A temperature dependent electron diffraction study has been carried out on UAsSe to search for evidence of As-As dimerization at low temperature. A highly structured characteristic diffuse intensity distribution, closely related to that recently reported for ThAsSe, has been observed at low temperature and interpreted in terms of a gradual charge density wave type phase transition upon lowering of temperature involving disordered As-As dimerization within (001) planes. Plausible models of the proposed As-As dimerization have been obtained using a group theoretical approach. Electronic band structure calculations of ThAsSe and UAsSe have been used to search for potential Fermi surface nesting wave-vectors. The results are in good agreement with the experimentally observed diffuse intensity distributions in both cases.",

keywords = "As-As dimerization, Band structure, Electron diffraction, Fermi surface nesting, Incommensurately modulated, Kondo effect",

author = "Withers, {Ray L.} and {van Midden}, {Herman J.P.} and Albert Prodan and Midgley, {P. A.} and J. Schoenes and R. Vincent",

year = "2006",

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doi = "10.1016/j.jssc.2006.04.016",

language = "English",

volume = "179",

pages = "2190--2198",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

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TY - JOUR

T1 - As-As dimerization, Fermi surfaces and the anomalous electrical transport properties of UAsSe and ThAsSe

AU - Withers, Ray L.

AU - van Midden, Herman J.P.

AU - Prodan, Albert

AU - Midgley, P. A.

AU - Schoenes, J.

AU - Vincent, R.

PY - 2006/7

Y1 - 2006/7

N2 - A temperature dependent electron diffraction study has been carried out on UAsSe to search for evidence of As-As dimerization at low temperature. A highly structured characteristic diffuse intensity distribution, closely related to that recently reported for ThAsSe, has been observed at low temperature and interpreted in terms of a gradual charge density wave type phase transition upon lowering of temperature involving disordered As-As dimerization within (001) planes. Plausible models of the proposed As-As dimerization have been obtained using a group theoretical approach. Electronic band structure calculations of ThAsSe and UAsSe have been used to search for potential Fermi surface nesting wave-vectors. The results are in good agreement with the experimentally observed diffuse intensity distributions in both cases.

AB - A temperature dependent electron diffraction study has been carried out on UAsSe to search for evidence of As-As dimerization at low temperature. A highly structured characteristic diffuse intensity distribution, closely related to that recently reported for ThAsSe, has been observed at low temperature and interpreted in terms of a gradual charge density wave type phase transition upon lowering of temperature involving disordered As-As dimerization within (001) planes. Plausible models of the proposed As-As dimerization have been obtained using a group theoretical approach. Electronic band structure calculations of ThAsSe and UAsSe have been used to search for potential Fermi surface nesting wave-vectors. The results are in good agreement with the experimentally observed diffuse intensity distributions in both cases.

KW - As-As dimerization

KW - Band structure

KW - Electron diffraction

KW - Fermi surface nesting

KW - Incommensurately modulated

KW - Kondo effect

UR - http://www.scopus.com/inward/record.url?scp=33745044475&partnerID=8YFLogxK

U2 - 10.1016/j.jssc.2006.04.016

DO - 10.1016/j.jssc.2006.04.016

M3 - Article

SN - 0022-4596

VL - 179

SP - 2190

EP - 2198

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

IS - 7

ER -

As-As dimerization, Fermi surfaces and the anomalous electrical transport properties of UAsSe and ThAsSe

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