Zobrazeno 1 - 10
of 168
pro vyhledávání: '"Cummings, Aron"'
We report a linear-scaling numerical method for exploring nonequilibrium electron dynamics in systems of arbitrary complexity. Based on the Chebyshev expansion of the time evolution of the single-particle density matrix, the method gives access to no
Externí odkaz:
http://arxiv.org/abs/2407.16544
Autor:
Calogero, Gaetano, Alcón, Isaac, Kaya, Onurcan, Papior, Nick, Cummings, Aron W., Brandbyge, Mads, Roche, Stephan
Bottom-up on-surface synthesis enables the fabrication of carbon nanostructures with atomic precision. Good examples are graphene nanoribbons (GNRs), 1D conjugated polymers, and nanoporous graphenes (NPGs), which are gathering increasing attention fo
Externí odkaz:
http://arxiv.org/abs/2407.08310
We report a study of a disorder-dependent real-space representation of the quantum geometry in topological systems. Thanks to the development of an efficient linear-scaling numerical methodology based on the kernel polynomial method, we can explore n
Externí odkaz:
http://arxiv.org/abs/2406.12677
Autor:
Guerrero, Pedro Alcázar, Nguyen, Viet-Hung, Romeral, Jorge Martínez, Cummings, Aron W., Garcia, José-Hugo, Charlier, Jean-Christophe, Roche, Stephan
Flat bands in moir\'e systems are exciting new playgrounds for the generation and study of exotic many-body physics phenomena in low-dimensional materials. Such physics is attributed to the vanishing kinetic energy and strong spatial localization of
Externí odkaz:
http://arxiv.org/abs/2401.08265
Topological quantum matter exhibits novel transport phenomena driven by entanglement between internal degrees of freedom, as for instance generated by spin-orbit coupling effects. Here we report on a direct connection between the mechanism driving sp
Externí odkaz:
http://arxiv.org/abs/2310.17950
We report on exceptionally long spin transport and giant spin lifetime anisotropy in the gapped surface states of three-dimensional (3D) magnetic topological insulators (MTIs). We examine the properties of these states using the Fu-Kane-Mele Hamilton
Externí odkaz:
http://arxiv.org/abs/2310.12377
During the last 15 years bottom-up on-surface synthesis has been demonstrated as an efficient way to synthesize carbon nanostructures with atomic precision, opening the door to unprecedented electronic control at the nanoscale. Nanoporous graphenes (
Externí odkaz:
http://arxiv.org/abs/2307.11480
Autor:
Antidormi, Aleandro, Cummings, Aron W.
Publikováno v:
AIP Advances 11, 115007 (2021)
Owing to its array of unique properties, graphene is a promising material for a wide variety of applications. Being two-dimensional, the properties of graphene are also easily tuned via proximity to other materials. In this work, we investigate the p
Externí odkaz:
http://arxiv.org/abs/2111.04571
Autor:
Antidormi, Aleandro, Cummings, Aron W.
Publikováno v:
Phys. Rev. Applied 15, 054049 (2021)
Among its many uses, graphene shows significant promise for optical and optoelectronic applications. In particular, devices based on the photothermoelectric effect (PTE) in graphene can offer a strong and fast photoresponse with high signal-to-noise
Externí odkaz:
http://arxiv.org/abs/2102.11225
Publikováno v:
Phys. Rev. B 103, 075129 (2021)
We investigate the electronic structure of graphene on a series of 2D hexagonal nitride insulators hXN, X = B, Al, and Ga, with DFT calculations. A symmetry-based model Hamiltonian is employed to extract orbital parameters and spin-orbit coupling (SO
Externí odkaz:
http://arxiv.org/abs/2011.14588