Dielectric spectroscopy is applied to the study of phase transitions in the range from room temperature down to 12 K in single crystals of tetracene (TEN), a well known material which, as most organic semiconductors, shows polymorphism. The present analysis, through proper experimental procedures, permits to identify the wide range (T > 150 K) of instabilities and of strong hysteresis effects as clear evidence of a non-ergodic state, then also clarifying some open questions, first of all the role of the sample thermal history, including the temperature variation rate and some apparent sample-dependence of the results. Furthermore evidence is obtained of two transitions at 144 K and 45 K

Parravicini, G., Campione, M., Marabelli, F., Moret, M., Sassella, A. (2012). Experimental assessment of nonergodicity in tetracene single crystals. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 86(2) [10.1103/PhysRevB.86.024107].

Experimental assessment of nonergodicity in tetracene single crystals

CAMPIONE, MARCELLO;MORET, MASSIMO;SASSELLA, ADELE
2012

Abstract

Dielectric spectroscopy is applied to the study of phase transitions in the range from room temperature down to 12 K in single crystals of tetracene (TEN), a well known material which, as most organic semiconductors, shows polymorphism. The present analysis, through proper experimental procedures, permits to identify the wide range (T > 150 K) of instabilities and of strong hysteresis effects as clear evidence of a non-ergodic state, then also clarifying some open questions, first of all the role of the sample thermal history, including the temperature variation rate and some apparent sample-dependence of the results. Furthermore evidence is obtained of two transitions at 144 K and 45 K
Articolo in rivista - Articolo scientifico
dielectric spectroscopy, tetracene, phase transition, non ergodicity
English
16-lug-2012
2012
86
2
024107
none
Parravicini, G., Campione, M., Marabelli, F., Moret, M., Sassella, A. (2012). Experimental assessment of nonergodicity in tetracene single crystals. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 86(2) [10.1103/PhysRevB.86.024107].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/31878
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