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

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

doi:10.1117/12.2273391

8 September 2017 Spectroscopic study of the charge density wave order in 2H[ -TaS₂

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

Proceedings Volume 10357, Spintronics X; 103570Q (2017) https://doi.org/10.1117/12.2273391
Event: SPIE Nanoscience + Engineering, 2017, San Diego, California, United States

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.

Citation Download Citation

J. Zhao, K. Wijayaratne, C. D. Malliakas, M. G. Kanatzidis, D. Y. Chung, G. Gu, and U. Chatterjee "Spectroscopic study of the charge density wave order in 2H[ -TaS₂", Proc. SPIE 10357, Spintronics X, 103570Q (8 September 2017); https://doi.org/10.1117/12.2273391

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