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Joint density of states and charge density wave in 2H-structured transition metal dichalcogenides |
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| Authors: | Dawei Shen Yan Zhang Gang Wu Lei Fang Donglai Feng |
| Affiliation: | a Applied Surface Physics State Key Laboratory, and Advanced Materials Laboratory, Department of Physics, Fudan University, Shanghai 200433, PR China b Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, PR China c National Lab for Superconductivity, Institute of Physics and National Lab for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, PR China |
| Abstract: | The joint density of states of two different 2H-structured transition metal dichalcogenides (TMDs) with and without charge density wave (CDW), Na0.05TaS2 and Cu0.09NbS2, respectively, are compared. While there is a clear maximum at the 3×3 charge density wavevector for Na0.05TaS2, the joint density of states for Cu0.09NbS2 does not show such behavior, consistent with the absence of CDW in the system. Our results illustrate that the joint density of states well represents the charge instability in 2D systems. |
| Keywords: | D. Electronic structure |
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