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pro vyhledávání: '"Kruchkov, Alex J."'
We investigate twisted double bilayer graphene (TDBG), a four-layer system composed of two AB-stacked graphene bilayers rotated with respect to each other by a small angle. Our ab initio band structure calculations reveal a considerable energy gap at
Externí odkaz:
http://arxiv.org/abs/1906.00623
Publikováno v:
Phys. Rev. B 100, 085109 (2019)
When two monolayers of graphene are stacked with a small relative twist angle, the resulting band structure exhibits a remarkably flat pair of bands at a sequence of 'magic angles' where correlation effects can induce a host of exotic phases. Here, w
Externí odkaz:
http://arxiv.org/abs/1901.10485
Publikováno v:
Phys. Rev. Lett. 122, 106405 (2019)
Twisted Bilayer graphene (TBG) is known to feature isolated and relatively flat bands near charge neutrality, when tuned to special magic angles. However, different criteria for the magic angle such as the vanishing of Dirac speed, minimal bandwidth
Externí odkaz:
http://arxiv.org/abs/1808.05250
Magnetic skyrmions are topologically protected spin-whirl quasiparticles currently considered as promising components for ultra-dense memory devices. In the bulk they form lattices that are stable over just a few Kelvin below the ordering temperature
Externí odkaz:
http://arxiv.org/abs/1703.06081
Autor:
Kruchkov, Alex J., Rønnow, Henrik M.
This paper studies the influence of electric fields on the skyrmion lattice (SkL) in insulating skyrmion compounds with weak magnetoelectric (ME) coupling. The ME coupling mechanism is an interaction between the external electric field $E$ and local
Externí odkaz:
http://arxiv.org/abs/1702.08863
Autor:
Kruchkov, Alex J.
Publikováno v:
Phys. Rev. A 93, 043817 (2016)
This paper introduces a quasiequilibrium one-dimensional Bose-Einstein condensation of photons trapped in a microtube. Light modes with a cut-off frequency (a photon's "mass") interact through different processes of absorption, emission, and scatteri
Externí odkaz:
http://arxiv.org/abs/1512.09257
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