Van der Waals devices for surface-sensitive experiments
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arXiv
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| Autori principali: | , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2025
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| _version_ | 1866913990139969536 |
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| author | Taufertshöfer, Nicolai Burri, Corinna Venturini, Rok Giannopoulos, Iason Ekahana, Sandy Adhitia Della Valle, Enrico Mraz, Anže Vaskivskyi, Yevhenii Lipic, Jan Barinov, Alexei Kazazis, Dimitrios Ekinci, Yasin Mihailovic, Dragan Gerber, Simon |
| author_facet | Taufertshöfer, Nicolai Burri, Corinna Venturini, Rok Giannopoulos, Iason Ekahana, Sandy Adhitia Della Valle, Enrico Mraz, Anže Vaskivskyi, Yevhenii Lipic, Jan Barinov, Alexei Kazazis, Dimitrios Ekinci, Yasin Mihailovic, Dragan Gerber, Simon |
| contents | In-operando characterization of van der Waals (vdW) devices using surface-sensitive methods provides critical insights into phase transitions and correlated electronic states. Yet, integrating vdW materials in functional devices while maintaining pristine surfaces is a key challenge for combined transport and surface-sensitive experiments. Conventional lithographic techniques introduce surface contamination, limiting the applicability of state-of-the-art spectroscopic probes. We present a stencil lithography-based approach for fabricating vdW devices, producing micron-scale electrical contacts, and exfoliation in ultra-high vacuum. The resist-free patterning method utilizes a shadow mask to define electrical contacts and yields thin flakes down to the single-layer regime via gold-assisted exfoliation. As a demonstration, we fabricate devices from 1$T-$TaS$_2$ flakes, achieving reliable contacts for application of electrical pulses and resistance measurements, as well as clean surfaces allowing for angle-resolved photoemission spectroscopy. The approach provides a platform for studying the electronic properties of vdW systems with surface-sensitive probes in well-defined device geometries. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_14003 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Van der Waals devices for surface-sensitive experiments Taufertshöfer, Nicolai Burri, Corinna Venturini, Rok Giannopoulos, Iason Ekahana, Sandy Adhitia Della Valle, Enrico Mraz, Anže Vaskivskyi, Yevhenii Lipic, Jan Barinov, Alexei Kazazis, Dimitrios Ekinci, Yasin Mihailovic, Dragan Gerber, Simon Mesoscale and Nanoscale Physics Strongly Correlated Electrons Applied Physics In-operando characterization of van der Waals (vdW) devices using surface-sensitive methods provides critical insights into phase transitions and correlated electronic states. Yet, integrating vdW materials in functional devices while maintaining pristine surfaces is a key challenge for combined transport and surface-sensitive experiments. Conventional lithographic techniques introduce surface contamination, limiting the applicability of state-of-the-art spectroscopic probes. We present a stencil lithography-based approach for fabricating vdW devices, producing micron-scale electrical contacts, and exfoliation in ultra-high vacuum. The resist-free patterning method utilizes a shadow mask to define electrical contacts and yields thin flakes down to the single-layer regime via gold-assisted exfoliation. As a demonstration, we fabricate devices from 1$T-$TaS$_2$ flakes, achieving reliable contacts for application of electrical pulses and resistance measurements, as well as clean surfaces allowing for angle-resolved photoemission spectroscopy. The approach provides a platform for studying the electronic properties of vdW systems with surface-sensitive probes in well-defined device geometries. |
| title | Van der Waals devices for surface-sensitive experiments |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons Applied Physics |
| url | https://arxiv.org/abs/2505.14003 |