Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Physics
Defect Structure Of Sb2−Xmnxte3 Single Crystals., Jaromír Horák, Petr LošŤÁK, Čestmír Drašar, Jeffrey Dyck, Zengzua Zhou, Cterid Uher
Defect Structure Of Sb2−Xmnxte3 Single Crystals., Jaromír Horák, Petr LošŤÁK, Čestmír Drašar, Jeffrey Dyck, Zengzua Zhou, Cterid Uher
Jeffrey Dyck
Incorporation of the transition metal elements in the tetradymite structure of Sb2Te3 has a strong influence on electronic properties. Recent studies have indicated that Mn substitutes on the Sb sublattice increases the carrier concentration of holes. However, the doping efficiency of Mn appears rather low in comparison to what it should be based on the measurements of magnetization, structural analysis, and transport properties. In this paper we address this issue by making detailed studies of the Hall effect and electrical resistivity and we explain the results with the aid of a model that takes into account interactions of the Mn …
Conduction Band Splitting And Transport Properties Of Bi2se3., J. Navrátil, J. Horák, T. Plecháček, S. Kamba, P. LošŤÁK, Jeffrey Dyck, W. Chen, C. Uher
Conduction Band Splitting And Transport Properties Of Bi2se3., J. Navrátil, J. Horák, T. Plecháček, S. Kamba, P. LošŤÁK, Jeffrey Dyck, W. Chen, C. Uher
Jeffrey Dyck
Detailed transport studies of single crystals of Bi2Se3 were made in the temperature range of 2–300K, and the data were analyzed in terms of a model consisting of two groups of electrons—a centrosymmetrical lower conduction band and an upper conduction band located away from the Γ-point. Very good agreement with the experimental data is obtained assuming the electrons are scattered on acoustic phonons and ionized impurities. A rather strong influence of the latter mechanism is attributed to a large number of charged selenium vacancies in Bi2Se3. The fitted transport parameters were used to calculate the electronic portion of the thermal …
Transport Properties Of Bi2−Xinxse3 Single Crystals., J. Navrátil, T. Plecháček, J. Horák, S. Karamazov, P. LošŤÁK, Jeffrey Dyck, W. Chen, C. Uher
Transport Properties Of Bi2−Xinxse3 Single Crystals., J. Navrátil, T. Plecháček, J. Horák, S. Karamazov, P. LošŤÁK, Jeffrey Dyck, W. Chen, C. Uher
Jeffrey Dyck
The paper reports on the temperature dependence of the electrical and thermal conductivity, Hall constant, and Seebeck coefficient of Bi2−xInxSe3 (x=0, 0.2, 0.4) single crystals measured over the temperature range from 2 to 300 K. One single-valley conduction band model is used to interpret relations among transport coefficients. The data analysis relies on the use of a mixed carrier scattering mechanism consisting of acoustic scattering and scattering on ionized impurities. The effect of In incorporation into the Bi2Se3 crystal lattice on the individual components of thermal conductivity is evaluated and discussed. Copyright 2001 Academic Press.