Quantum billiards with correlated electrons confined in triangular transition metal dichalcogenide monolayer nanostructures
| Autor: | Yevhenii Vaskivskyi, Jaka Vodeb, Igor Vaskivskyi, Viktor V. Kabanov, Dragan Mihailovic, Polona Aupič, Denis Golež, Yaroslav A. Gerasimenko, Jan Ravnik |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Length scale
Phase transition Electronic properties and materials Materials science Science General Physics and Astronomy Physics::Optics 02 engineering and technology Electron 01 natural sciences Article General Biochemistry Genetics and Molecular Biology Crystal Surfaces interfaces and thin films 0103 physical sciences Monolayer Physics::Atomic Physics 010306 general physics Quantum Quantum tunnelling Multidisciplinary Condensed matter physics General Chemistry 021001 nanoscience & nanotechnology 0210 nano-technology Ground state |
| Zdroj: | Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Forcing systems through fast non-equilibrium phase transitions offers the opportunity to study new states of quantum matter that self-assemble in their wake. Here we study the quantum interference effects of correlated electrons confined in monolayer quantum nanostructures, created by femtosecond laser-induced quench through a first-order polytype structural transition in a layered transition-metal dichalcogenide material. Scanning tunnelling microscopy of the electrons confined within equilateral triangles, whose dimensions are a few crystal unit cells on the side, reveals that the trajectories are strongly modified from free-electron states both by electronic correlations and confinement. Comparison of experiments with theoretical predictions of strongly correlated electron behaviour reveals that the confining geometry destabilizes the Wigner/Mott crystal ground state, resulting in mixed itinerant and correlation-localized states intertwined on a length scale of 1 nm. The work opens the path toward understanding the quantum transport of electrons confined in atomic-scale monolayer structures based on correlated-electron-materials. Atomically precise nanostructures resulting from a laser-induced phase change offer a rich playground to study the interplay between confinement and correlations. Here, the authors report on quantum interference effects in equilateral triangles created by a laser-induced polytype phase transition in TaS2. |
| Databáze: | OpenAIRE |
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