Geometric phases in graphitic cones |
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Authors: | Claudio Furtado Fernando Moraes |
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Affiliation: | a Departamento de Física, CCEN, Universidade Federal da Paraíba, Cidade Universitária, 58051-970 João Pessoa, PB, Brazil b Departamento de Física, Universidade Estadual de Feira de Santana, BR116-Norte, Km 3, 44031-460 Feira de Santana, BA, Brazil |
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Abstract: | In this Letter we use a geometric approach to study geometric phases in graphitic cones. The spinor that describes the low energy states near the Fermi energy acquires a phase when transported around the apex of the cone, as found by a holonomy transformation. This topological result can be viewed as an analogue of the Aharonov-Bohm effect. The topological analysis is extended to a system with n cones, whose resulting configuration is described by an effective defect. |
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Keywords: | 73.61.Wp 73.20.Dx 73.50.Jt |
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