Multifold Seebeck increase in RuO2 films by quantum-guided lanthanide dilute alloying

被引：11
作者：
Music, Denis [1 ]
Basse, Felix H. -U. [1 ]
Han, Liang [2 ]
Devender [3 ]
Borca-Tasciuc, Theo [2 ]
Gengler, Jamie J. [4 ,5 ]
Voevodin, Andrey A. [4 ]
Ramanath, Ganpati [1 ,3 ]
Schneider, Jochen M. [1 ]
机构：
[1] Rhein Westfal TH Aachen, D-52074 Aachen, Germany
[2] Rensselaer Polytech Inst, Dept Mech Aerosp & Nucl Engn, Troy, NY 12180 USA
[3] Rensselaer Polytech Inst, Mat Sci & Engn Dept, Troy, NY 12180 USA
[4] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA
[5] Spectral Energies LLC, Dayton, OH 45431 USA
来源：
APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 05期
关键词：
OXIDE THERMOELECTRIC-MATERIALS; INITIO MOLECULAR-DYNAMICS; TRANSITION; POWER;
D O I：
10.1063/1.4864078
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Ab initio predictions indicating that alloying RuO2 with La, Eu, or Lu can increase the Seebeck coefficient alpha manifold due to quantum confinement effects are validated in sputter-deposited La-alloyed RuO2 films showing fourfold alpha increase. Combinatorial screening reveals that alpha enhancement correlates with La-induced lattice distortion, which also decreases the thermal conductivity twentyfold, conducive for high thermoelectric figures of merit. These insights should facilitate the rational design of high efficiency oxide-based thermoelectrics through quantum-guided alloying. (C) 2014 AIP Publishing LLC.
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页数：5
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