New Layered
Fluorosulfide SrFBiS<sub>2</sub>
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Abstract
We
have synthesized a new layered BiS<sub>2</sub>-based compound, SrFBiS<sub>2</sub>. This compound has a similar structure to LaOBiS<sub>2</sub>. It is built up by stacking up SrF layers and NaCl-type BiS<sub>2</sub> layers alternatively along the <i>c</i> axis. Electric
transport measurement indicates that SrFBiS<sub>2</sub> is a semiconductor.
Thermal transport measurement shows that SrFBiS<sub>2</sub> has a
small thermal conductivity and large Seebeck coefficient. First principle
calculations are in agreement with experimental results and show that
SrFBiS<sub>2</sub> is very similar to LaOBiS<sub>2</sub>, which becomes
a superconductor with F doping. Therefore, SrFBiS<sub>2</sub> may
be a parent compound of new superconductors