Pseudospin in graphene
WebFeb 6, 2024 · The concept of pseudospin is a generalization of spin to a two-level quantum system that originates from the two carbon sublattices in graphene 3. In principle, pseudospin can be utilized for... WebElectrons in graphene are described by Dirac-Weyl spinorswith a relativistic two-component pseudospin 1-12 The unique pseudospin structure of Dirac electrons leads to emerging phenomena such...
Pseudospin in graphene
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WebGraphene’s spin equivalent pseudospin arises from the degeneracy introduced by the honeycomb lattice’s two inequivalent atomic sites per unit cell. Previously it has been … WebSep 8, 2016 · 1. Introduction. Since its recent experimental realization [], graphene has attracted a lot of research interest because of its remarkable transport properties.At low energy, single-layer graphene (SLG) has a linear dispersion spectrum, and charge carriers can be described as massless, chiral, Dirac fermions.Moreover, SLG is a zero-gap …
WebJul 26, 2012 · Pseudospin, an additional degree of freedom emerging in graphene as a direct consequence of its honeycomb atomic structure, is responsible for many of the … WebThe pseudomagnetic field induced by the deformation becomes visible as a sublattice symmetry breaking which scales with the lifting height of the strained deformation and …
WebThis degree of freedom is called pseudospin. If the wavefunction was finite only on A sublattice → (1,0)T = ↑ > on B sublattice → (0,1)T = ↓ > In graphene, the density is … Webever, pseudospin does not respond to a magnetic field. For graphene, one approach to modulating pseudospin is through mechanical deformation that generates a “pseudomagnetic” field [9,15,16]. In another method, an electrical potential induced mass type of perturbation in bilayer or monolayer graphene [6,17–19] leading to an energy gap ...
WebAbstract. Graphene, a one-atom-thick form of carbon, has emerged in the last few years as a fertile electron system, highly promising for both fundamental research and applications. In this thesis we consider several topics in electronic and spin properties of graphene, with a particular emphasis on the quantum Hall effect (QHE) regime, where ...
WebWe propose a way of producing and detecting pseudospin entanglement between electrons and holes in graphene. Electron-hole pairs are produced by a fluctuating potential and their entanglement is demonstrated by a curre… children spelling booksWebSep 7, 2007 · The electronic properties of graphene. This article reviews the basic theoretical aspects of graphene, a one atom thick allotrope of carbon, with unusual two-dimensional Dirac-like electronic excitations. The Dirac … children spelling testsWebWe show the presence of non-relativistic Lévy-Leblond fermions in flat three- and four-layers graphene with AB stacking, extending the results obtained in Cariglia et al. 2024 for … children spelling games onlinehttp://chaos1.la.asu.edu/~yclai/papers/PRResearch_2024_HXL_2.pdf government teams accountWebSep 23, 2024 · Here we report the possibility of manipulating the pseudospin and lifting its degeneracy through the substrate corrugation in graphene, which directly relates to the chirality of Dirac fermions in the low energy regime. ... Georgi A et al. 2024 Tuning the pseudospin polarization of graphene by a pseudomagnetic field Nano Lett. 17 2240–5 ... children spelling softwareWebMar 9, 2024 · Very recently, it was demonstrated that intervalley scattering induced by the single carbon defect of graphene leads to phase winding over a closed path surrounding the defect. Motivated by this, we demonstrate that the single carbon defects at A and B sublattices of graphene can be regarded as pseudospin-mediated atomic-scale vortices … children speech therapyWebFeb 17, 2015 · Pseudospin, an additional degree of freedom inherent in graphene, plays a key role in understanding many fundamental phenomena such as the anomalous quantum Hall effect, electron chirality and ... children specialized hospital jersey city