Addressing the spin-valley flavors in moir'e mini-bands of MoS2
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866914787974184960 |
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| author | Sharma, Chithra H. Prada, Marta Schmidt, Jan-Hendrik D'iaz-Palacio, Isabel Gonz'alez Stauber, Tobias Taniguchi, Takashi Watanabe, Kenji Tiemann, Lars Blick, Robert H. |
| author_facet | Sharma, Chithra H. Prada, Marta Schmidt, Jan-Hendrik D'iaz-Palacio, Isabel Gonz'alez Stauber, Tobias Taniguchi, Takashi Watanabe, Kenji Tiemann, Lars Blick, Robert H. |
| contents | The physics of moir'e superlattices and the resulting formation of mini-bands in van der Waals materials have opened up an exciting new field in condensed matter physics. These systems exhibit a rich phase diagram of novel physical phenomena and exotic correlated phases that emerge in the low-dispersing bands. Transition metal dichalcogenides, in particular, molybdenum disulfide (MoS2), are potential candidates to extend the studies on moir'e electronics beyond graphene. Our transport spectroscopy measurements and analysis reveal a correlation-driven phase transition and the emergence of discrete mini-bands in MoS2 moir'e superlattices that remained elusive so far. We resolve these mini-bands arising from quantum mechanical tunneling through Schottky barriers between the MoS2 and its metallic leads. Energy scales deduced from a first approach exhibit an astounding agreement with our experimental observations. The behavior under thermal activation suggests a Lifshitz phase transition at low temperatures that is driven by a complete spin-valley symmetry breaking. These intriguing observations bring out the potential of twisted MoS2 to explore correlated electron states and associated physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2304_03316 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Addressing the spin-valley flavors in moir'e mini-bands of MoS2 Sharma, Chithra H. Prada, Marta Schmidt, Jan-Hendrik D'iaz-Palacio, Isabel Gonz'alez Stauber, Tobias Taniguchi, Takashi Watanabe, Kenji Tiemann, Lars Blick, Robert H. Mesoscale and Nanoscale Physics The physics of moir'e superlattices and the resulting formation of mini-bands in van der Waals materials have opened up an exciting new field in condensed matter physics. These systems exhibit a rich phase diagram of novel physical phenomena and exotic correlated phases that emerge in the low-dispersing bands. Transition metal dichalcogenides, in particular, molybdenum disulfide (MoS2), are potential candidates to extend the studies on moir'e electronics beyond graphene. Our transport spectroscopy measurements and analysis reveal a correlation-driven phase transition and the emergence of discrete mini-bands in MoS2 moir'e superlattices that remained elusive so far. We resolve these mini-bands arising from quantum mechanical tunneling through Schottky barriers between the MoS2 and its metallic leads. Energy scales deduced from a first approach exhibit an astounding agreement with our experimental observations. The behavior under thermal activation suggests a Lifshitz phase transition at low temperatures that is driven by a complete spin-valley symmetry breaking. These intriguing observations bring out the potential of twisted MoS2 to explore correlated electron states and associated physics. |
| title | Addressing the spin-valley flavors in moir'e mini-bands of MoS2 |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2304.03316 |