Transport properties of binary phosphide AgP₂ denoting high Hall mobility and low lattice thermal conductivity

Abstract This study found that polycrystalline AgP 2 shows intrinsic semiconducting electrical conductivity with Hall mobility of 51 cm V −1 s , which is as high Mg Si, and lattice thermal 1.2 W K m low Bi Te 3 . First-principles calculations theoretically indicate an semiconductor, the estimated carrier relaxation time τ 3.3 fs, long for a material. Moreover, effective mass hole * approximately 0.11 times free electrons. These results light are origins experimentally obtained mobility. Phonon Ag atoms in exhibit highly anharmonic phonon modes mode Grüneisen parameters more than 50–100 low-frequency range. The large vibrations reduce mean path. was found, theoretically, to be approx. at room temperature by phonon–phonon grain-boundary scattering.