Superconducting Properties of 3D Low-Density Translation-Invariant Bipolaron Gas

Table 1

Calculated characteristics of Bose gas of TI-bipolarons with concentration  .

	0	1	2	3	4	5	6
	0	0,2	1	2	10	15	20
		136,6	30	16	4,2	3	2,5
	1,3	1,44	1,64	1,8	2,5	2,8	3
	0,11	0,12	0,12	0,13	0,14	0,15	0,15
	1,9	2,16	2,46	2,7	3,74	4,2	1,6
	0	0,16	0,36	0,52	1,23	1,53	1,8

, meV, is the energy of an optical phonon; is the critical temperature of the transition, is the latent heat of the transition from condensate to supracondensate state; is the jump in heat capacity during SC transition, ; is the heat capacity in the SC phase at the critical point; , . The calculations are carried out for the concentration of TI-bipolarons and the effective mass of a band electron . The table also lists the values of concentrations of TI-bipolarons for HTSC , based on the experimental value of the transition temperature = 93K (Section 6).