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首頁(yè)> 中文期刊> 《物理學(xué)報(bào)》 >有機(jī)自旋器件磁性滲透層中雙極化子對(duì)自旋極化輸運(yùn)的影響?

有機(jī)自旋器件磁性滲透層中雙極化子對(duì)自旋極化輸運(yùn)的影響?

     

摘要

根據(jù)實(shí)驗(yàn)發(fā)現(xiàn)的有機(jī)器件如Co/有機(jī)半導(dǎo)體/La0.7Sr0.3MnO3中磁性原子滲透現(xiàn)象,利用自旋漂移-擴(kuò)散方程,理論研究了磁性滲透層中極化子-雙極化子的轉(zhuǎn)化對(duì)自旋極化輸運(yùn)的影響.研究發(fā)現(xiàn):磁性滲透層具有不同于純凈有機(jī)層的遷移率和自旋反轉(zhuǎn)時(shí)間,都將影響極化子-雙極化子的轉(zhuǎn)化,進(jìn)而影響自旋極化的輸運(yùn);在磁性滲透層中極化子自旋反轉(zhuǎn)時(shí)間的劈裂是引起自旋弛豫的主要因素,而極化子和雙極化子之間的轉(zhuǎn)化是重要因素.%According to the permeation phenomenon of magnetic atoms in organic device, such as Co/organic semiconductor (OSC)/La0.7Sr0.3MnO3, the evolution of spin polarons and spinless bipolarons are calculated with the drift-diffusion equations to investigate the effect of polaron-bipolaron interaction on spin polarized transport in a magnetic permeated sublayer (MPS). It is found that the MPS has different spin-flip time and mobility from those in pure organic semi-conductor. The splitting of spin-flip time will be adjusted by the effect of the magnetization of the impurity atoms. Mobilities of spin carriers in the MPS will be reduced due to the scattering of the Co atoms. Both the spin-flip time and the mobility will affect the polaron-bipolaron interaction and further influence the spin polarized transport. It is found that the splitting of spin-flip time is the main factor responsible for the spin relaxation, while the polaron-bipolaron interaction is the secondary factor.

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