Open AccessHigh electrical conductivity in out of plane direction of electrodeposited Bi2Te3 films
Author(s) -
Miguel Muñoz Rojo,
Cristina V. Manzano,
Daniel Granados,
Manuel Osorio,
Theodorian BorcaTasciuc,
Marisol MartínGonzález
Publication year - 2015
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4928863
Subject(s) - electrical resistivity and conductivity , materials science , conductivity , electrode , anisotropy , electric field , finite element method , plane (geometry) , deposition (geology) , voltage , condensed matter physics , metal , composite material , geometry , optics , electrical engineering , metallurgy , chemistry , physics , thermodynamics , mathematics , paleontology , quantum mechanics , sediment , biology , engineering
The out of plane electrical conductivity of highly anisotropic Bi2Te3 films grown via electro-deposition process was determined using four probe current-voltage measurements performed on 4.6 - 7.2 μm thickness Bi2Te3 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) ⋅ 105 S/m is reported along the out of plane direction for Bi2Te3 films highly oriented in the [1 1 0] direction
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