| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Layered Compounds AFBiS2: Superior Birefringent Crystals |
| WANG Hai** |
College of Materials Science and Engineering, Tongji University, Shanghai 201804
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| Cite this article: |
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WANG Hai 2015 Chin. Phys. Lett. 32 017801 |
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Abstract First-principles calculations predict that SrFBiS2 has a superior birefringence of 1.28, which is larger than the giant birefringence of LaOBiS2 [Wang H, Chin. Phys. Lett. 31 2013 047802]. An AF layer (i.e., SrF) is shown to be important by the further investigations on AFBiS2 (A=Mg, Ca, Ba). Here MgFBiS2 exhibits the largest inherent birefringence (～1.66) among single-crystal compounds. The origin of SBF is also discussed based on the electronic structure and refractive index.
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Published: 23 December 2014
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