Pseudospin in graphene
WebApr 11, 2024 · In the graphene-based normal/superconductor/normal double junction, when the light field is modulated from left circularly polarized light to right circularly polarized light, the valley-spin switching effect between pure elastic co-tunneling and pure crossed Andreev reflection can be realized. ... is the pseudospin Pauli matrix for two ... 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 ...
Pseudospin in graphene
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WebFeb 22, 2016 · Artificial optical graphene has been used to demonstrate that pseudospin is a measurable physical quantity. In particular, multiple-beam interference, which is carefully aligned with the... WebEnter the email address you signed up with and we'll email you a reset link.
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... WebFeb 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 ...
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 ... WebJun 19, 2012 · Helicity and Pseudospin in Graphene. The Hamiltonian for graphene at k → away from the K point is proportional to. The helicity operator is σ → ⋅ k → / k, which is …
WebFeb 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 Klein paradox. Unlike the electron spin, the pseudospin was traditionally considered as an unmeasurable quantity, immune to Stern-Gerlach-type …
WebSep 1, 2024 · Pseudospin, a degree of freedom in a two-level quantum system of two sublattices, is a basic quantum number that poses a fundamental symmetry prone to the electronic nature of graphene. thompson manitoba garbage scheduleWebMar 28, 2011 · The pseudospins are both related to the peculiar band structure of graphene, shown in Fig. 1. One is called sublattice pseudospin and the other valley isospin. The former occurs due to the bipartite … thompson manitoba airport codeWebNov 2, 2011 · In graphene, the pseudospin and the valley flavor arise as new types of quantum degrees of freedom due to the honeycomb lattice comprising two sublattices (A … thompson manitoba current weatherWebJun 26, 2015 · In summary, we have demonstrated that the pseudospin-mediated vortex generation can be controlled in photonic graphene simply by selective excitation of the two HCL sublattices. The vortex generation can be observed only when one of the two sublattices is excited, and the topological charge of the vortex depends on the sublattice … thompson manitoba friendship centreWebGraphene’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 … uk tv coverage of f1 2018WebOct 8, 2014 · Properties of spin and pseudospin in monolayer graphene are investigated in terms of geometric algebra (GA). Specifically, Cl &$_ {3,1}$; algebra that describes Minkowski relativistic spacetime... uk tv download for freehttp://chaos1.la.asu.edu/~yclai/papers/PRResearch_2024_HXL_2.pdf thompson manitoba canada map