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Atomic reconstruction in twisted bilayers of transition metal dichalcogenides (2020)
Journal Article
Weston, A., Zou, Y., Enaldiev, V., Summerfield, A., Clark, N., Z´olyomi, V., …Gorbachev, R. (2020). Atomic reconstruction in twisted bilayers of transition metal dichalcogenides. Nature Nanotechnology, 15(7), 592–597. https://doi.org/10.1038/s41565-020-0682-9

Van der Waals heterostructures form a unique class of layered artificial solids in which physical properties can be manipulated through controlled composition, order and relative rotation of adjacent atomic planes. Here we use atomic-resolution trans... Read More about Atomic reconstruction in twisted bilayers of transition metal dichalcogenides.

Dissipative quantum state preparation and metastability in two-photon micromasers (2020)
Journal Article
Kouzelis, A., Macieszczak, K., Minář, J., & Lesanovsky, I. (2020). Dissipative quantum state preparation and metastability in two-photon micromasers. Physical Review A, 101(4), Article 043847. https://doi.org/10.1103/physreva.101.043847

We study the preparation of coherent quantum states in a two-photon micromaser for applications in quantum metrology. While this setting can be in principle realized in a host of physical systems, we consider atoms interacting with the field of a cav... Read More about Dissipative quantum state preparation and metastability in two-photon micromasers.

Step-Flow Growth of Graphene-Boron Nitride Lateral Heterostructures by Molecular Beam Epitaxy (2020)
Journal Article
Thomas, J., Bradford, J., Cheng, T. S., Summerfield, A., Wrigley, J., Mellor, C. J., …Beton, P. H. (2020). Step-Flow Growth of Graphene-Boron Nitride Lateral Heterostructures by Molecular Beam Epitaxy. 2D Materials, 7(3), Article 035014. https://doi.org/10.1088/2053-1583/ab89e7

Integration of graphene and hexagonal boron nitride (hBN) into lateral heterostructures has drawn focus due to the ability to broadly engineer the material properties. Hybrid monolayers with tuneable bandgaps have been reported, while the interface i... Read More about Step-Flow Growth of Graphene-Boron Nitride Lateral Heterostructures by Molecular Beam Epitaxy.

Temporal superoscillation of sub-terahertz coherent acoustic phonons (2020)
Journal Article
Brehm, S., Akimov, A. .., Campion, R. P., & Kent, A. J. (2020). Temporal superoscillation of sub-terahertz coherent acoustic phonons. Physical Review Research, 2(2), Article 023009. https://doi.org/10.1103/PhysRevResearch.2.023009

We observe coherent acoustic phonon superoscillations at sub-terahertz frequencies. The superoscillations result from the interference of optically excited coherent longitudinal acoustic phonon modes in a GaAs/AlGaAs superlattice. The superoscillatio... Read More about Temporal superoscillation of sub-terahertz coherent acoustic phonons.

Large non-thermal contribution to picosecond strain pulse generation using the photo-induced phase transition in VO2 (2020)
Journal Article
Mogunov, I. A., Lysenko, S., Fedianin, A. E., Fernández, F. E., Rúa, A., Kent, A. J., …Kalashnikova, A. M. (2020). Large non-thermal contribution to picosecond strain pulse generation using the photo-induced phase transition in VO2. Nature Communications, 11(1), Article 1690. https://doi.org/10.1038/s41467-020-15372-z

Picosecond strain pulses are a versatile tool for investigation of mechanical properties of meso-and nano-scale objects with high temporal and spatial resolutions. Generation of such pulses is traditionally realized via ultrafast laser excitation of... Read More about Large non-thermal contribution to picosecond strain pulse generation using the photo-induced phase transition in VO2.