Electron-Electron Interaction Effects in Sb–Te–Ag Phase-Change Media

• Published in: Japanese Journal of Applied Physics Vol. 38; no. 3S; p. 1703
• Main Authors: Wu, Chih Yuan, Yao, Yeong Der, Song, Yu Lin, Huang, Der-Ray
• Format: Journal Article
• Language: English
• Published: 1999
• ISSN: 0021-4922; 1347-4065
• DOI: 10.1143/JJAP.38.1703

We have measured the electrical resistivity of (Sb 2 Te 3 ) 1- x Ag x phase-change media (0.13 ≤ x ≤0.21) between 2 and 15 K, in order to investigate the occurrence of temperature and disorder dependent correction, Δρ( T ,ρ r ), to the residual resistivity in a disordered system. As the temperature T is lowered to the liquid helium temperature, a resistivity rise Δρ/√T ∼-ρ r 2.5 is observed. This functional form is due to the enhanced electron-electron interaction effects in a disordered metal. Our experimental results completely support the theoretical predictions, i.e. Δρ( T ) ∼- √Tρ r 2.5 .