On the electronic spectrum of low-dimensional structures with the symmetry of borders |
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| Authors: | S N Molotkov |
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| Institution: | 1.Institute of Solid State Physics,Russian Academy of Sciences,Chernogolovka, Moscow region,Russia;2.Academy of Cryptography of the Russian Federation,Moscow,Russia;3.Faculty of Computational Mathematics and Cybernetics,Moscow State University,Moscow,Russia |
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| Abstract: | The features of the electronic spectrum in low-dimensional (quasi-one-dimensional) structures with symmetry of borders have been considered. It has been shown that, in the spinless case, the conical massless
(Dirac) form of the spectrum (ɛ(k) ∝ ± |k|) appears in groups with glide planes. This spectrum is a consequence of forced degeneracy, which appears due to the joint
action of the lattice symmetry elements and time reversal invariance. For the spinor representations, the conical shape of
the spectrum appears in all groups. |
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