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  Non-vanishing Berry phase in chiral insulators

Kübler, J., Yan, B., & Felser, C. (2013). Non-vanishing Berry phase in chiral insulators. EPL, 104(3): 30001, pp. 1-6. doi:10.1209/0295-5075/104/30001.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0017-BE9B-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0017-BEAB-C
Genre: Journal Article

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Kübler, J.1, Author
Yan, B.2, Author              
Felser, C.3, Author              
Affiliations:
1external, ou_persistent22              
2Binghai Yan, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863427              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: The binary compounds FeSi, RuSi, and OsSi are chiral insulators crystallizing in the space group P2(1)3 which is cubic. By means of ab initio calculations we find for these compounds a non-vanishing electronic Berry phase, the sign of which depends on the handedness of the crystal. There is thus the possibility that the Berry phase signals the existence of a macroscopic electric polarization due to the electrons. We show that this is indeed so if a small external magnetic field is applied in the [111] direction. The electric polarization is oscillatory in the magnetic field and possesses a signature that distinguishes the handedness of the crystal. Our findings add to the discussion of topological classifications of insulators and are significant for spintronics applications, and in particular, for a deeper understanding of skyrmions in insulators. Copyright (C) EPLA, 2013

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 Dates: 2013-11-11
 Publication Status: Published in print
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Title: EPL
  Other : Europhysics Letters
Source Genre: Journal
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Pages: - Volume / Issue: 104 (3) Sequence Number: 30001 Start / End Page: 1 - 6 Identifier: Other: 0295-5075
CoNE: /journals/resource/0295-5075