title: Spin seebeck effect and thermal colossal magnetoresistance in graphene nanoribbon heterojunction.
abstract: Spin caloritronics devices are very important for future development of low-power-consumption technology. We propose a new spin caloritronics device based on zigzag graphene nanoribbon (ZGNR), which is a heterojunction consisting of single-hydrogen-terminated ZGNR (ZGNR-H) and double-hydrogen-terminated ZGNR (ZGNR-H2). We predict that spin-up and spin-down currents flowing in opposite directions can be induced by temperature difference instead of external electrical bias. The thermal spin-up current is considerably large and greatly improved compared with previous work in graphene. Moreover, the thermal colossal magnetoresistance is obtained in our research, which could be used to fabricate highly-efficient spin caloritronics MR devices.
authors: School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China.
authors: Yun
authors: Y
authors: Ni
authors: Kailun
authors: K
authors: Yao
authors: Huahua
authors: H
authors: Fu
authors: Guoying
authors: G
authors: Gao
authors: Sicong
authors: S
authors: Zhu
authors: Shuling
authors: S
authors: Wang