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 | |
| 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 |
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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
Cite this
Spectroscopic study of the charge density wave order in 2H-TaS2. / Zhao, J.; Wijayaratne, K.; Malliakas, C. D.; Kanatzidis, Mercouri G; Chung, D. Y.; Gu, G.; Chatterjee, U.
Spintronics X. Vol. 10357 SPIE, 2017. 103570Q.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
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TY - GEN
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
UR - http://www.scopus.com/inward/record.url?scp=85033395490&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85033395490&partnerID=8YFLogxK
U2 - 10.1117/12.2273391
DO - 10.1117/12.2273391
M3 - Conference contribution
AN - SCOPUS:85033395490
VL - 10357
BT - Spintronics X
PB - SPIE
ER -