Dynamical Simulations of Polaron Spin-Filtering and Rectification in an Organic Magnetic–Nonmagnetic Co-oligomer: The Interfacial Effect
| Autor: | Jingfen Zhao, Hongxia Bu, Desheng Liu, Wen-li Guan, Hui Wang, Changjian Ji, Hong-yan Shi, Yuan-xun Yu, Kun Gao, Wen-jing Wang, Zai-fa Yang, Yuan Li, Xiao-juan Yuan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Condensed Matter::Quantum Gases
Spin filtering Materials science Condensed matter physics 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Polaron 01 natural sciences Oligomer 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Coupling (physics) General Energy chemistry Rectification Electric field Condensed Matter::Strongly Correlated Electrons Physical and Theoretical Chemistry 0210 nano-technology Computer Science::Databases Spin-½ |
| Zdroj: | The Journal of Physical Chemistry C. 123:14432-14438 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.9b01819 |
| Popis: | The interfacial effect on the dynamical properties of spin-dependent polarons in an organic magnetic/nonmagnetic co-oligomer is investigated by using a tight-binding model coupled with a nonadiabatic dynamic method. It is found that the dynamical behaviors of spin-up and spin-down polarons are quite different at the interface. In the presence of an external electric field, polarons with a specific spin (up or down) can get trapped near the magnetic/nonmagnetic interface while the motion of polarons with an opposite spin is not affected, which leads to the phenomenon of polaron spin-filtering. Interestingly, when the electric field is reversely applied, only polarons with opposite spin can pass through the co-oligomer and spin rectification can be observed. The spin-filtering and rectification can be improved by increasing the strength of the spin correlation in the magnetic part of the co-oligomer and they can also be affected by the strength of the interfacial electron–lattice coupling and the electronic... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|