Results 21 to 30 of about 142,691 (284)
Dirac node engineering and flat bands in doped Dirac materials
Physical Review Research, 2021 We suggest the tried approach of impurity band engineering to produce flat bands and additional nodes in Dirac materials. We show that surface impurities give rise to nearly flat impurity bands close to the Dirac point.
Anna Pertsova +3 more
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Two-dimensional Dirac materials: Tight-binding lattice models and material candidates
ChemPhysMater, 2023 : The discovery of graphene has led to the devotion of intensive efforts, theoretical and experimental, to produce two-dimensional (2D) materials that can be used for developing functional materials and devices.
Runyu Fan +4 more
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Dirac Structures in Nonequilbrium Thermodynamics [PDF]
Journal of Mathematical Physics, 2017 Dirac structures are geometric objects that generalize both Poisson structures and presymplectic structures on manifolds. They naturally appear in the formulation of constrained mechanical systems. In this paper, we show that the evolution equations for nonequilibrium thermodynamics admit an intrinsic formulation in terms of Dirac structures, both on ...
Gay-Balmaz, François +1 more
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IEEE Access, 2022 In this work, we present a study on the existence of Dirac type dispersion in the simplest of periodic metallic waveguide structures. It is shown that periodic repetitions of two dissimilar waveguides (WGs) can be properly designed to lead to a Dirac ...
Sina Rezaee +2 more
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Dirac structures on Hilbert spaces
International Journal of Mathematics and Mathematical Sciences, 1999 For a real Hilbert space (H,〈,〉), a subspace L⊂H⊕H is said to be a Dirac structure on H if it is maximally isotropic with respect to the pairing 〈(x,y),(x′,y′)〉+=(1/2)(〈x,y′〉+〈x′,y〉).
A. Parsian, A. Shafei Deh Abad
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Multiplicative Dirac structures on Lie groups [PDF]
, 2008 We study multiplicative Dirac structures on Lie groups. We show that the characteristic foliation of a multiplicative Dirac structure is given by the cosets of a normal Lie subgroup and, whenever this subgroup is closed, the leaf space inherits the ...
Bursztyn +7 more
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Omni-Lie 2-algebras and their Dirac structures [PDF]
, 2011 We introduce the notion of omni-Lie 2-algebra, which is a categorification of Weinstein's omni-Lie algebras. We prove that there is a one-to-one correspondence between strict Lie 2-algebra structures on 2-sub-vector spaces of a 2-vector space $\V$ and ...
Baez +14 more
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Dirac Structures, Nonholonomic Systems and Reduction [PDF]
Reports on Mathematical Physics, 2012 39 ...
Jotz, M. M., Ratiu, T. S.
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Dirac Structures on Banach Lie Algebroids
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2014 In the original definition due to A. Weinstein and T. Courant a Dirac structure is a subbundle of the big tangent bundle T M ⊕ T* M that is equal to its ortho-complement with respect to the so-called neutral metric on the big tangent bundle.
Vulcu Vlad-Augustin
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Dirac Structures and Dixmier–Douady Bundles [PDF]
International Mathematics Research Notices, 2011 41 ...
Alekseev, A., Meinrenken, E.
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