Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Grassano, Davide"'
Topological Weyl semimetals represent a novel class of non-trivial materials, where band crossings with linear dispersions take place at generic momenta across reciprocal space. These crossings give rise to low-energy properties akin to those of Weyl
Externí odkaz:
http://arxiv.org/abs/2308.01663
Publikováno v:
SciPost Phys. 15, 025 (2023)
Using a variational approach, the binding energies $E_b$ of the lowest bound excitons in Xenes under varying electric field are investigated. The internal exciton motion is described both by Dirac electron dispersion and in effective-mass approximati
Externí odkaz:
http://arxiv.org/abs/2301.08601
Topological materials have been a main focus of studies in the past decade due to their protected properties that can be exploited for the fabrication of new devices. Among them, Weyl semimetals are a class of topological semimetals with non-trivial
Externí odkaz:
http://arxiv.org/abs/2208.11412
Publikováno v:
Phys. Rev. Materials 7, 094202 (2023)
Quantum spin Hall insulators are a class of topological materials that has been extensively studied during the past decade. One of their distinctive features is the presence of a finite band gap in the bulk and gapless, topologically protected edge s
Externí odkaz:
http://arxiv.org/abs/2205.02583
Autor:
Kutrovskaya, Stella, Osipov, Anton, Baryshev, Stepan, Zasedatelev, Anton, Samyshkin, Vlad, Demirchyan, Sevak, Pulci, Olivia, Grassano, Davide, Gontrani, Lorenzo, Hartmann, Richard R., Portnoi, Mikhail E., Kucherik, Alexey, Lagoudakis, Pavlos, Kavokin, Alexey
We studied monoatomic linear carbon chains stabilised by gold nanoparticles attached to their ends and deposited on a solid substrate. We observe spectral features of straight chains containing from 8 to 24 atoms. Low temperature PL spectra reveal ch
Externí odkaz:
http://arxiv.org/abs/1910.09797
Influence of anisotropy, tilt and pairing of Weyl nodes: The Weyl semimetals TaAs, TaP, NbAs and NbP
By means of $ab \ initio$ band structure methods and model Hamiltonians we investigate the electronic, spin and topological properties of four monopnictides crystallizing in body centered tetragonal structure. We show that the Weyl bands around a Wey
Externí odkaz:
http://arxiv.org/abs/1906.12231
Autor:
Prete, Maria Stella, Grassano, Davide, Pulci, Olivia, Kupchak, Ihor, Olevano, Valerio, Bechstedt, Friedhelm
Absorption and emission of pristine-like semiconducting monolayers of BN, AlN, GaN, and InN are here systematically studied by ab-initio methods. We calculate the absorption spectra for in-plane and out-of-plane light polarization including quasipart
Externí odkaz:
http://arxiv.org/abs/1903.12031
Ab initio optical and energy loss spectra of transition metal monopnictides TaAs, TaP, NbAs, and NbP
Publikováno v:
Journal of Applied Physics 124, 205110 (2018)
Transition metal monopnictides represent a new class of topological semimetals with low-energy excitations, namely, Weyl fermions. We report optical properties across a wide spectral energy range for TaAs, TaP, NbAs and NbP, calculated within density
Externí odkaz:
http://arxiv.org/abs/1804.07505
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