LAUSR

The concentration dependences of Seebeck coefficient S, resistivity ρ, thermal conductivity κtot, and Hall constant RH are studied for mixed Pb1–xAgxS and Pb1–xCuxS crystals in the 0 < x ≤ 0.011 range of concentrations at T = 300 K. It is found that silver is an acceptor impurity and can induce conductivity inversion (from n-type to p-type) in Pb1 − xAgxS samples at x ≈ 0.0045. Such inversion is not observed in the S(х), ρ(х), κtot(x), and RH(x) dependences for Pb1–xCuxS (0 < x ≤ 0.011), though the acceptor behavior of the copper impurity was also apparent in these dependences.