Atomistic switch of giant magnetoresistance and spin thermopower in graphene-like nanoribbons.
Atomistic switch of giant magnetoresistance and spin thermopower in graphene-like nanoribbons.
复制标题
类石墨烯纳米带中巨磁阻和自旋热电的原子开关
DOI:
10.1038/srep36762
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发表时间:
2016-11-18
影响因子:
4.6
通讯作者:
Wang XF
中科院分区:
文献类型:
--
作者:
Zhai MX;Wang XF
We demonstrate that the giant magnetoresistance can be switched off (on) in even- (odd-) width zigzag graphene-like nanoribbons by an atomistic gate potential or edge disorder inside the domain wall in the antiparallel (ap) magnetic configuration. A strong magneto-thermopower effect is also predicted that the spin thermopower can be greatly enhanced in the ap configuration while the charge thermopower remains low. The results extracted from the tight-binding model agree well with those obtained by first-principles simulations for edge doped graphene nanoribbons. Analytical expressions in the simplest case are obtained to facilitate qualitative analyses in general contexts.
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