期刊
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
卷 142, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.physe.2022.115316
关键词
Spintronics; Molecular junction; External electric field; Zigzag graphene nanoribbon; Width affect; Half-metallicity
资金
- National Natural Science Foundation of China [61801520, 11774085]
- Scientific Re-search Project of Hunan Province Education Department, China [20B144]
This study explores the control of magnetic transition behavior by altering the coupling between a molecule and a nanoribbon. The researchers find that the sensitivity of the magnetic response is greater in the asymmetry structure model compared to the symmetry model. By applying an external electric field, the asymmetry models can induce a series of magnetic phase transitions and can convert the half-metallic state from spin-up sub-band to spin-down sub-band. The findings offer a potential approach for achieving logic operations in spintronics.
The controlling of magnetic transition behavior by changing the coupling between molecule and nanoribbon has attracted a new topic. Here we study a zigzag graphene nanoribbon (ZGNR) absorbing the porphine molecules with different manners under an in-plane external electric field. These structureless systems may exhibit sensitive magnetic response. By employing the first-principles calculations, we find that the sensitivity of magnetic response for the asymmetry structure model is superior to the symmetry one. In general a series of the magnetic phase transitions for the asymmetry models can be induced by an in-plane external electric filed. Particularly, asymmetrical model of ZGNR absorbing porphine molecule at one side can transfer the half-metallic state from spin-up sub-band to spin-down one. Our analysis demonstrate that the phase transition is manipulated by the direction changing of the interior electric field. Interestingly, the models of structural asymmetry can exhibit spin-polarized electron band structures with the spin-polarization rate reaching up to 100%. The findings may provide an approach for the design of new devices to realize logic operation within spintronics.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据