Growth, morphology and electrical properties of (thallium selenide)x-(indium selenide)1 − x mixed crystals (x = 0.0, 0.1, 0.2,…, 0.9, 1.0)

Origin of structural instability in TlInS2(1−x)Se2xsolid solutions

“…In our opinion, the instabilities observed in the electrical conductivity of TlInSe 2 crystals [33][34][35][36][37] are an essential property and are important in understanding the nature of the dielectric response of this compound at low temperatures. This phenomenon has been intensively studied by several research groups, and it has been found that TlInSe 2 exhibits nonlinear effects in electrical behavior in the temperature range below ∼200 K, such as S-shaped current-voltage characteristics, self-excited voltage oscillations in the current-controlled negative differential resistance region and oscillations and jumping in the electrical conductivity [33][34][35][36][37]. The origin of the electrical instabilities in TlInSe 2 has been analyzed in [33,34,47], and it was shown that most probably these effects may be provoked by the dynamic electronic processes in [In 3+ + Se 2− 2 ] − fibers of the crystal.…”

“…In recent years, there has been a new wave of interest in TlInSe 2 in the literature. Several studies have been carried out on the electrical characteristics of TlInSe 2 [33][34][35][36][37]. It was found that TlInSe 2 exhibits nonlinear effects in electrical behavior, such as S-shaped current-voltage characteristics, voltage oscillations in the negative differential resistance region and electrical switching effects.…”