EN
A large number of compounds which contain
BiS2 layers exhibit enhanced superconductivity upon electron
doping. Much interest and research effort has been focused
on BiS2-based compounds which provide new opportunities
for exploring the nature of superconductivity.
Important to the study of BiS2-based superconductors is
the relation between structure and superconductivity. By
modifying either the superconducting BiS2 layers or the
blocking layers in these layered compounds, one can effectively
tune the lattice parameters, local atomic environment,
electronic structure, and other physical properties
of these materials. In this article, we will review some of
the recent progress on research of the effects of chemical
substitution in BiS2-based compounds, with special attention
given to the compounds in the LnOBiS2 (Ln = La-Nd)
system. Strategieswhich are reported to be essential in optimizing
superconductivity of these materials will also be
discussed.