Spectroscopic study of the charge density wave order in 2H-TaS2

J. Zhao; K. Wijayaratne; C. D. Malliakas; Mercouri G Kanatzidis; D. Y. Chung; G. Gu; U. Chatterjee

doi:10.1117/12.2273391

Spectroscopic study of the charge density wave order in 2H-TaS₂

J. Zhao, K. Wijayaratne, C. D. Malliakas, Mercouri G Kanatzidis, D. Y. Chung, G. Gu, U. Chatterjee

Northwestern University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We conduct Angle Resolved Photoemission Spectroscopy (ARPES) investigation on 2H-TaS₂, a prototypical incommensurate Charge Density Wave (CDW) material. A comparative study of the low-energy electronic structures of 2H-TaS₂ and two other related compounds, 2H-TaSe₂ and 2H-NbSe₂, identifies several generic features of their CDW orders. Firstly, Fermi surface (FS) nesting alone doesn't seem to give rise to the CDW instability in these compounds. Secondly, partial gapping of the underlying FS surface in the CDW state is common to each of these materials. Finally, the CDW energy gap, unlike the energy gap in a superconductor, is not symmetric with respect to the chemical potential.

Original language	English
Title of host publication	Spintronics X
Publisher	SPIE
Volume	10357
ISBN (Electronic)	9781510611719
DOIs	https://doi.org/10.1117/12.2273391
Publication status	Published - Jan 1 2017
Event	Spintronics X Symposium - San Diego, United States Duration: Aug 6 2017 → Aug 10 2017

Other

Other	Spintronics X Symposium
Country	United States
City	San Diego
Period	8/6/17 → 8/10/17

Keywords

Angle Resolved Photoemission Spectroscopy
Bogoliubov dispersion
Charge density wave
Energy gap
Fermi surface
Particle-hole symmetry.
Superconductor
Transition metal dichalcogenide

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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Zhao, J., Wijayaratne, K., Malliakas, C. D., Kanatzidis, M. G., Chung, D. Y., Gu, G., & Chatterjee, U. (2017). Spectroscopic study of the charge density wave order in 2H-TaS₂. In Spintronics X (Vol. 10357). [103570Q] SPIE. https://doi.org/10.1117/12.2273391

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title = "Spectroscopic study of the charge density wave order in 2H-TaS2",

abstract = "We conduct Angle Resolved Photoemission Spectroscopy (ARPES) investigation on 2H-TaS2, a prototypical incommensurate Charge Density Wave (CDW) material. A comparative study of the low-energy electronic structures of 2H-TaS2 and two other related compounds, 2H-TaSe2 and 2H-NbSe2, identifies several generic features of their CDW orders. Firstly, Fermi surface (FS) nesting alone doesn't seem to give rise to the CDW instability in these compounds. Secondly, partial gapping of the underlying FS surface in the CDW state is common to each of these materials. Finally, the CDW energy gap, unlike the energy gap in a superconductor, is not symmetric with respect to the chemical potential.",

keywords = "Angle Resolved Photoemission Spectroscopy, Bogoliubov dispersion, Charge density wave, Energy gap, Fermi surface, Particle-hole symmetry., Superconductor, Transition metal dichalcogenide",

author = "J. Zhao and K. Wijayaratne and Malliakas, {C. D.} and Kanatzidis, {Mercouri G} and Chung, {D. Y.} and G. Gu and U. Chatterjee",

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doi = "10.1117/12.2273391",

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T1 - Spectroscopic study of the charge density wave order in 2H-TaS2

AU - Zhao, J.

AU - Wijayaratne, K.

AU - Malliakas, C. D.

AU - Kanatzidis, Mercouri G

AU - Chung, D. Y.

AU - Gu, G.

AU - Chatterjee, U.

PY - 2017/1/1

Y1 - 2017/1/1

N2 - We conduct Angle Resolved Photoemission Spectroscopy (ARPES) investigation on 2H-TaS2, a prototypical incommensurate Charge Density Wave (CDW) material. A comparative study of the low-energy electronic structures of 2H-TaS2 and two other related compounds, 2H-TaSe2 and 2H-NbSe2, identifies several generic features of their CDW orders. Firstly, Fermi surface (FS) nesting alone doesn't seem to give rise to the CDW instability in these compounds. Secondly, partial gapping of the underlying FS surface in the CDW state is common to each of these materials. Finally, the CDW energy gap, unlike the energy gap in a superconductor, is not symmetric with respect to the chemical potential.

AB - We conduct Angle Resolved Photoemission Spectroscopy (ARPES) investigation on 2H-TaS2, a prototypical incommensurate Charge Density Wave (CDW) material. A comparative study of the low-energy electronic structures of 2H-TaS2 and two other related compounds, 2H-TaSe2 and 2H-NbSe2, identifies several generic features of their CDW orders. Firstly, Fermi surface (FS) nesting alone doesn't seem to give rise to the CDW instability in these compounds. Secondly, partial gapping of the underlying FS surface in the CDW state is common to each of these materials. Finally, the CDW energy gap, unlike the energy gap in a superconductor, is not symmetric with respect to the chemical potential.

KW - Angle Resolved Photoemission Spectroscopy

KW - Bogoliubov dispersion

KW - Charge density wave

KW - Energy gap

KW - Fermi surface

KW - Particle-hole symmetry.

KW - Superconductor

KW - Transition metal dichalcogenide

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BT - Spintronics X

PB - SPIE

T2 - Spintronics X Symposium

Y2 - 6 August 2017 through 10 August 2017

ER -