Issue 32, 2019

Pure spin current generated in thermally driven molecular magnetic junctions: a promising mechanism for thermoelectric conversion

Abstract

Pure spin current is expected to be utilized for designing energy-saving devices. Using first-principles calculations in combination with a non-equilibrium Green's function method, the spin-dependent thermoelectric transport properties of metallocene dimer-based molecular junctions are investigated. The results show that spin-polarized currents can be achieved when a temperature difference is applied in molecular structures. It is found that the spin-polarized transport properties are different when transition metals in the dimers are different. It is interesting that a negative differential thermoelectric resistance and a perfect spin filtering effect can be found in chromocene dimer-based and manganocene dimer-based molecular junctions. Moreover, one key finding is that a pure spin current can be obtained in a cobaltocene dimer-based molecular junction, in which the spin-dependent Seebeck coefficient is larger than the charge Seebeck coefficient. These interesting results indicate that metallocene dimer-based molecular junctions have potential applications in future thermal spintronic and spin thermoelectric devices.

Graphical abstract: Pure spin current generated in thermally driven molecular magnetic junctions: a promising mechanism for thermoelectric conversion

Supplementary files

Article information

Article type
Paper
Submitted
04 may 2019
Accepted
18 iyl 2019
First published
20 iyl 2019

J. Mater. Chem. A, 2019,7, 19037-19044

Pure spin current generated in thermally driven molecular magnetic junctions: a promising mechanism for thermoelectric conversion

D. Wu, X. Cao, S. Chen, L. Tang, Y. Feng, K. Chen and W. Zhou, J. Mater. Chem. A, 2019, 7, 19037 DOI: 10.1039/C9TA04642A

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