Quantum-interference-enhanced thermoelectricity in single molecules and molecular films

详细信息    查看全文

• 作者：Colin J. Lambert^a ; ^{c.lambert@lancaster.ac.uk" class="auth_mail" title="E-mail the corresponding author} ; Hatef Sadeghi^a ; ^{h.sadeghi@lancaster.ac.uk" class="auth_mail" title="E-mail the corresponding author} ; Qusiy H. Al-Galiby^a ; ^b ; ^{q.agaliby@lancaster.ac.uk" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Molecular electronics ; Thermoelectricity ; Quantum interference ; Seebeck coefficient
• 刊名：Comptes Rendus Physique
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：17
• 期：10
• 页码：1084-1095
• 全文大小：1102 K

文摘

We provide a brief overview of recent measurements and predictions of thermoelectric properties of single-molecules and porous nanoribbons and discuss some principles underpinning strategies for enhancing their thermoelectric performance. The latter include (a) taking advantage of steep slopes in the electron transmission coefficient T(E)$T(E)$, (b) creating structures with delta-function-like transmission coefficients and (c) utilising step-like features in T(E)$T(E)$. To achieve high performance, we suggest that the latter may be the most fruitful, since it is less susceptible to inhomogeneous broadening. For the purpose of extrapolating thermoelectric properties of single or few molecules to monolayer molecular films, we also discuss the relevance of the conductance-weighted average Seebeck coefficient.