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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2011, Volume 93, Issue 2, Pages 63–68
(Mi jetpl1806)
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This article is cited in 150 scientific papers (total in 150 papers)
CONDENSED MATTER
Dimensional crossover in topological matter: Evolution of the multiple Dirac point in the layered system to the flat band on the surface
T. T. Heikkiläa, G. E. Volovikab a Low Temperature Laboratory, Aalto University, School of Science and Technology, FI-00076 AALTO, Finland
b Landau Institute for Theoretical Physics RAS, 119334 Moscow, Russia
Abstract:
We consider the dimensional crossover in the topological matter, which involves the transformation of different types of topologically protected zeroes in the fermionic spectrum. In the considered case, the multiple Dirac (Fermi) point in quasi 2-dimensional system evolves into the flat band on the surface of the 3-dimensional system when the number of atomic layers increases. This is accompanied by formation of the spiral nodal lines in the bulk. We also discuss the topological quantum phase transition at which the surface flat band shrinks and changes its chirality, while the nodal spiral changes its helicity.
Received: 25.11.2010
Citation:
T. T. Heikkilä, G. E. Volovik, “Dimensional crossover in topological matter: Evolution of the multiple Dirac point in the layered system to the flat band on the surface”, Pis'ma v Zh. Èksper. Teoret. Fiz., 93:2 (2011), 63–68; JETP Letters, 93:2 (2011), 59–65
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https://www.mathnet.ru/eng/jetpl1806 https://www.mathnet.ru/eng/jetpl/v93/i2/p63
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Abstract page: | 345 | Full-text PDF : | 85 | References: | 56 |
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