This article is cited in 2 papers

Phase transitions

Phase transitions and processes of disordering in crystals of the Cu$_6$PS$_5$I$_{1-x}$Cl$_x$ solid solutions

I. P. Studenyak^a, V. E. Ponomarev^a, M. Kranjčec^b, V. Yu. Izai^a, L. M. Suslikov<sup>a

a</sup> Uzhgorod National University
^b University of Zagreb, Varaždin, HR 42000, Croatia

Abstract: The temperatures of phase transitions in crystals of the Cu$_6$PS$_5$I$_{1-x}$Cl$_x$ solid solutions have been determined and the $x$–$T$ phase diagram of the crystals has been constructed using isoabsorption and polarization-optical measurements. The absorption edge of the Cu$_6$PS$_5$I$_{1-x}$Cl$_x$ crystals has been investigated in the temperature range 77–320 K and at high absorption levels. The parameters of the Urbach absorption edge and exciton-phonon interaction in the Cu$_6$PS$_5$I$_{1-x}$Cl$_x$ crystals have been determined, and the influence of the compositional disorder on these crystals has been analyzed.

Received: 18.10.2011

 English version: Physics of the Solid State, 2012, 54:6, 1269–1274

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