Layered Compounds A FBiS2 : Superior Birefringent Crystals
WANG Hai**
College of Materials Science and Engineering, Tongji University, Shanghai 201804
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 A F layer (i.e., SrF) is shown to be important by the further investigations on A FBiS2 (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.
出版日期: 2014-12-23
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2015, Vol. 32 
