Suppression of Stacking Order with Doping in 1T-TaS2−xSex

Sharon S. Philip; Despina Louca; Matthew B. Stone; Alexander I. Kolesnikov

doi:10.3390/condmat8040089

Suppression of Stacking Order with Doping in 1T-TaS_2−xSe_x

Sharon S. Philip, Despina Louca, Matthew B. Stone, Alexander I. Kolesnikov

Direct Geometry

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

3 Scopus citations

Abstract

In 1T-TaS (Formula presented.) Se (Formula presented.), the charge density wave (CDW) state features a star of David lattice that expands across layers as the system becomes commensurate upon cooling. The layers can also order along the c-axis, and different stacking orders have been proposed. Using neutron scattering on powder samples, we compared the stacking order previously observed in 1T-TaS (Formula presented.) when the system is doped with Se. While at low temperature, a 13c layer sequence stacking was observed in TaS (Formula presented.) ; this type of ordering was not evident with doping. Doping with Se results in a metallic state in which the Mott transition is suppressed, which may be linked to the absence of layer stacking.

Original language	English
Article number	89
Journal	Condensed Matter
Volume	8
Issue number	4
DOIs	https://doi.org/10.3390/condmat8040089
State	Published - Dec 2023

Funding

This research was funded by the U.S. National Science Foundation, Grant No. 2219493.

Funders	Funder number
National Science Foundation	2219493

Keywords

CDW
layer stacking
super superconductivity

Access to Document

10.3390/condmat8040089

Cite this

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title = "Suppression of Stacking Order with Doping in 1T-TaS2−xSex",

abstract = "In 1T-TaS (Formula presented.) Se (Formula presented.), the charge density wave (CDW) state features a star of David lattice that expands across layers as the system becomes commensurate upon cooling. The layers can also order along the c-axis, and different stacking orders have been proposed. Using neutron scattering on powder samples, we compared the stacking order previously observed in 1T-TaS (Formula presented.) when the system is doped with Se. While at low temperature, a 13c layer sequence stacking was observed in TaS (Formula presented.) ; this type of ordering was not evident with doping. Doping with Se results in a metallic state in which the Mott transition is suppressed, which may be linked to the absence of layer stacking.",

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AU - Philip, Sharon S.

AU - Louca, Despina

AU - Stone, Matthew B.

AU - Kolesnikov, Alexander I.

PY - 2023/12

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N2 - In 1T-TaS (Formula presented.) Se (Formula presented.), the charge density wave (CDW) state features a star of David lattice that expands across layers as the system becomes commensurate upon cooling. The layers can also order along the c-axis, and different stacking orders have been proposed. Using neutron scattering on powder samples, we compared the stacking order previously observed in 1T-TaS (Formula presented.) when the system is doped with Se. While at low temperature, a 13c layer sequence stacking was observed in TaS (Formula presented.) ; this type of ordering was not evident with doping. Doping with Se results in a metallic state in which the Mott transition is suppressed, which may be linked to the absence of layer stacking.

AB - In 1T-TaS (Formula presented.) Se (Formula presented.), the charge density wave (CDW) state features a star of David lattice that expands across layers as the system becomes commensurate upon cooling. The layers can also order along the c-axis, and different stacking orders have been proposed. Using neutron scattering on powder samples, we compared the stacking order previously observed in 1T-TaS (Formula presented.) when the system is doped with Se. While at low temperature, a 13c layer sequence stacking was observed in TaS (Formula presented.) ; this type of ordering was not evident with doping. Doping with Se results in a metallic state in which the Mott transition is suppressed, which may be linked to the absence of layer stacking.

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