Dust-acoustic solitons in dusty plasma with two-temperature ions

Dust-acoustic solitons in dusty plasmas with two-temperature isothermal ion s are investigated by considering an effect of self-consistent dust-charge variation. Employing the reductive perturbation technique we: derived dust- acoustic solitons. It is found that both rarefactive and compressive: solit ons exist and the approximate similarity law which holds in dust-charge-flu ctuation plasma system with one-temperature ion does not survive in the pre sent studied dusty plasma with two-temperature isothermal ions.