Charge and spin-dependent thermal efficiency of polythiophene molecular junction in presence of dephasing

doi:10.1088/1674-1056/24/10/108402

中国物理B ›› 2015, Vol. 24 ›› Issue (10): 108402-108402.doi: 10.1088/1674-1056/24/10/108402

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Charge and spin-dependent thermal efficiency of polythiophene molecular junction in presence of dephasing

Z. Golsanamlou, M. Bagheri Tagani, H. Rahimpour Soleimani

Department of Physics, University of Guilan, P. O. Box 41335-1914, Rasht, Iran

收稿日期:2015-02-23 修回日期:2015-05-06 出版日期:2015-10-05 发布日期:2015-10-05

Charge and spin-dependent thermal efficiency of polythiophene molecular junction in presence of dephasing

Z. Golsanamlou, M. Bagheri Tagani, H. Rahimpour Soleimani

Department of Physics, University of Guilan, P. O. Box 41335-1914, Rasht, Iran

Received:2015-02-23 Revised:2015-05-06 Online:2015-10-05 Published:2015-10-05
Contact: Z. Golsanamlou, H. Rahimpour Soleimani E-mail:zahra.golsanamlou@gmail.com;rahimpour@guilan.ac.ir

摘要/Abstract

摘要： The charge and spin-dependent thermoelectric properties of different lengths of polythiophene in a molecular junction are investigated using the Büttiker probe method within Green function formalism in linear response regime. The coupling of the molecular chain to three-dimensional ferromagnetic electrodes is described by a tight-binding model for both parallel and antiparallel spin configurations. The decrease of height of transmission probability peaks and thermoelectric coefficients are observed in the presence of the Büttiker probes. The reduction is more intensive in the strong dephased chains. Results show that the spin magnetothermopower is bigger than the charge magnetothermopower due to the larger difference between the spin thermopowers with respect to the charge ones. In addition, we observed that the kind of carriers participating in the thermoelectric transport depends on the number of the thiophene rings.

关键词: polythiophene, Green function, thermoelectric coefficients, Bü, ttiker probes, ferromagnetic electrodes

Abstract: The charge and spin-dependent thermoelectric properties of different lengths of polythiophene in a molecular junction are investigated using the Büttiker probe method within Green function formalism in linear response regime. The coupling of the molecular chain to three-dimensional ferromagnetic electrodes is described by a tight-binding model for both parallel and antiparallel spin configurations. The decrease of height of transmission probability peaks and thermoelectric coefficients are observed in the presence of the Büttiker probes. The reduction is more intensive in the strong dephased chains. Results show that the spin magnetothermopower is bigger than the charge magnetothermopower due to the larger difference between the spin thermopowers with respect to the charge ones. In addition, we observed that the kind of carriers participating in the thermoelectric transport depends on the number of the thiophene rings.

Key words: polythiophene, Green function, thermoelectric coefficients, Büttiker probes, ferromagnetic electrodes

中图分类号: (Thermoelectric, electrogasdynamic and other direct energy conversion)

84.60.Rb

75.76.+j (Spin transport effects) 73.63.Rt (Nanoscale contacts)

Z. Golsanamlou, M. Bagheri Tagani, H. Rahimpour Soleimani. Charge and spin-dependent thermal efficiency of polythiophene molecular junction in presence of dephasing[J]. 中国物理B, 2015, 24(10): 108402-108402.

Z. Golsanamlou, M. Bagheri Tagani, H. Rahimpour Soleimani. Charge and spin-dependent thermal efficiency of polythiophene molecular junction in presence of dephasing[J]. Chin. Phys. B, 2015, 24(10): 108402-108402.

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Charge and spin-dependent thermal efficiency of polythiophene molecular junction in presence of dephasing

Charge and spin-dependent thermal efficiency of polythiophene molecular junction in presence of dephasing

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