Zobrazeno 1 - 10
of 235
pro vyhledávání: '"Covaci, L."'
Autor:
Kourmoulakis, G., Michail, A., Paradisanos, I., Marie, X., Glazov, M. M., Jorissen, B., Covaci, L., Stratakis, E., Papagelis, K., Parthenios, J., Kioseoglou, G.
We perform micro-photoluminescence and Raman experiments to examine the impact of biaxial tensile strain on the optical properties of WS2 monolayers. A strong shift on the order of -130 meV per % of strain is observed in the neutral exciton emission
Externí odkaz:
http://arxiv.org/abs/2307.12663
Publikováno v:
Phys. Rev. Lett. 127, 106801 (2021)
The moir\'e pattern observed in stacked non-commensurate crystal lattices, such as hetero-bilayers of transition metal dichalcogenides, produces a periodic modulation of their bandgap. Excitons subjected to this potential landscape exhibit a band str
Externí odkaz:
http://arxiv.org/abs/2107.00102
A wave-packet time evolution method, based on the split-operator technique, is developed to investigate the scattering of quasi-particles at a normal-superconductor interface of arbitrary profile and shape. As a practical application, we consider a s
Externí odkaz:
http://arxiv.org/abs/2009.07957
Autor:
Wang, Zihao, Wang, Yi Bo, Yin, J., Tóvári, E., Yang, Y., Lin, L., Holwill, M., Birkbeck, J., Perello, D. J., Xu, Shuigang, Zultak, J., Gorbachev, R. V., Kretinin, A. V., Taniguchi, T., Watanabe, K., Morozov, S. V., Anđelković, M., Milovanović, S. P., Covaci, L., Peeters, F. M., Mishchenko, A., Geim, A. K., Novoselov, K. S., Fal'ko, Vladimir I., Knothe, Angelika, Woods, C. R.
Publikováno v:
Science Advances 20 Dec 2019: Vol. 5, no. 12, eaay8897
When two-dimensional atomic crystals are brought into close proximity to form a van der Waals heterostructure, neighbouring crystals can start influencing each others electronic properties. Of particular interest is the situation when the periodicity
Externí odkaz:
http://arxiv.org/abs/1912.12268
Publikováno v:
Phys. Rev. B 102, 245427 (2020)
The strain fields of periodically buckled graphene induce a periodic pseudo-magnetic field (PMF) that modifies the electronic band structure. From the geometry, amplitude, and period of the periodic pseudo-magnetic field, we determine the necessary c
Externí odkaz:
http://arxiv.org/abs/1910.11752
A periodic spatial modulation, as created by a moir\'e pattern, has been extensively studied with the view to engineer and tune the properties of graphene. Graphene encapsulated by hexagonal boron nitride (hBN) when slightly misaligned with the top a
Externí odkaz:
http://arxiv.org/abs/1910.00345
The mechanical and electronic properties of a graphene membrane placed on top of a superlattice of nanopillars are investigated. We use molecular dynamics (MD) simulations to access the deformation fields and the tight-binding approaches to calculate
Externí odkaz:
http://arxiv.org/abs/1811.10345
Publikováno v:
Phys. Rev. B 97, 134514 (2018)
Extended defects are known to strongly affect nanoscale superconductors. Here we report the properties of superconducting nanoribbons with a constriction formed between two adjacent step-edges, by solving the Bogoliubov-de Gennes equations self-consi
Externí odkaz:
http://arxiv.org/abs/1803.02709
Publikováno v:
Phys. Rev. B 97, 045301 (2018)
We show that delaminations in bilayer graphene (BLG) with electrostatically induced interlayer asymmetry can provide one with ballistic channels for electrons with energies inside the electrostatically induced BLG gap. These channels are formed by a
Externí odkaz:
http://arxiv.org/abs/1801.03322
Publikováno v:
Phys. Rev. B 96, 224512 (2017)
Spin-triplet chiral p-wave superconductivity is typically described by a two-component order parameter, and as such is prone to unique emergent effects when compared to the standard single-component superconductors. Here we present the equilibrium ph
Externí odkaz:
http://arxiv.org/abs/1710.08440