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High electrical conductivity in out of plane direction of electrodeposited Bi2Te3 films

AuthorsMuñoz Rojo, Miguel ; Manzano, Cristina V. ; Granados, Daniel ; Osorio, M. R.; Borca Tasciuc, Theodorian; Martín-González, Marisol
Issue Date2015
PublisherAmerican Institute of Physics
CitationAIP Advances 5: 087142 (2015)
Abstract© 2015 Author(s). The out of plane electrical conductivity of highly anisotropic Bi<inf>2</inf>Te<inf>3</inf> films grown via electro-deposition process was determined using four probe current-voltage measurements performed on 4.6 - 7.2 μm thickness Bi<inf>2</inf>Te<inf>3</inf> mesa structures with 80 - 120 μm diameters sandwiched between metallic film electrodes. A three-dimensional finite element model was used to predict the electric field distribution in the measured structures and take into account the non-uniform distribution of the current in the electrodes in the vicinity of the probes. The finite-element modeling shows that significant errors could arise in the measured film electrical conductivity if simpler one-dimensional models are employed. A high electrical conductivity of (3.2 ± 0.4) · 10<sup>5</sup> S/m is reported along the out of plane direction for Bi<inf>2</inf>Te<inf>3</inf> films highly oriented in the [1 1 0] direction.
Publisher version (URL)http://dx.doi.org/10.1063/1.4928863
Identifiersissn: 2158-3226
Appears in Collections:(IMN-CNM) Artículos
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