**Superconductivity in the
presence of a pseudogap induced by local charge
density waves**

*Chem.
Met. Alloys* 4
(2011) 50-57

Radoslaw SZCZĘŚNIAK,
Dominik SZCZĘŚNIAK

A model describing the thermodynamic
properties of a superconducting phase in the presence of a pseudogap
induced by local charge density waves is presented in the paper. Within the
framework of the model calculations it is shown that the obtained phase diagram
reproduces properly, in a qualitative way, the phase diagram of the
superconducting state for BaPb_{1−x}Bi_{x}O_{3}.
It is further shown that the pseudogap very strongly
reduces the value of the order parameter for the superconducting phase, whereas
the value of the electron effective mass and the energy shift function are
independent of the pseudogap.

(A) Phase diagram predicted by the
classical Eliashberg theory. (B) Experimentally
determined phase diagram for BPBO. In both figures *T*_{c}
denotes the critical temperature; *x* ~ á*n*ñ was assumed, where á*n*ñ is the average number of electrons
at the node.

**Keywords**

Superconductors / Thermodynamic
properties