Direct measurement of terahertz conductivity in a gated monolayer semiconductor
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2024
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866915274574266368 |
|---|---|
| author | Chen, Su-Di Feng, Qixin Zhao, Wenyu Qi, Ruishi Zhang, Zuocheng Abeysinghe, Dishan Uzundal, Can Xie, Jingxu Taniguchi, Takashi Watanabe, Kenji Wang, Feng |
| author_facet | Chen, Su-Di Feng, Qixin Zhao, Wenyu Qi, Ruishi Zhang, Zuocheng Abeysinghe, Dishan Uzundal, Can Xie, Jingxu Taniguchi, Takashi Watanabe, Kenji Wang, Feng |
| contents | Two-dimensional semiconductors and their moiré superlattices have emerged as important platforms for investigating correlated electrons. However, many key properties of these systems, such as the frequency-dependent conductivity, remain experimentally inaccessible because of the mesoscopic sample size. Here we report a technique to directly measure the complex conductivity of electrostatically gated two-dimensional semiconductors in the terahertz frequency range. Applying this technique to a WSe2 monolayer encapsulated in hBN, we observe clear Drude-like response between 0.1 and 1 THz, in a density range challenging to access even in DC transport. Our work opens a new avenue for studying tunable van der Waals heterostructures using terahertz spectroscopy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_17633 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Direct measurement of terahertz conductivity in a gated monolayer semiconductor Chen, Su-Di Feng, Qixin Zhao, Wenyu Qi, Ruishi Zhang, Zuocheng Abeysinghe, Dishan Uzundal, Can Xie, Jingxu Taniguchi, Takashi Watanabe, Kenji Wang, Feng Mesoscale and Nanoscale Physics Strongly Correlated Electrons Two-dimensional semiconductors and their moiré superlattices have emerged as important platforms for investigating correlated electrons. However, many key properties of these systems, such as the frequency-dependent conductivity, remain experimentally inaccessible because of the mesoscopic sample size. Here we report a technique to directly measure the complex conductivity of electrostatically gated two-dimensional semiconductors in the terahertz frequency range. Applying this technique to a WSe2 monolayer encapsulated in hBN, we observe clear Drude-like response between 0.1 and 1 THz, in a density range challenging to access even in DC transport. Our work opens a new avenue for studying tunable van der Waals heterostructures using terahertz spectroscopy. |
| title | Direct measurement of terahertz conductivity in a gated monolayer semiconductor |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2409.17633 |