| Publication Type |
pre-print |
| School or College |
College of Engineering |
| Department |
Materials Science & Engineering |
| Creator |
Liu, Feng |
| Other Author |
Chen, Xiaobin; Liu, Yizhou; Gu, Bing-Lin; Duan, Wenhui |
| Title |
Giant room-temperature spin caloritronics in spin-semiconducting graphene nanoribbons |
| Date |
2014-01-01 |
| Description |
Spin caloritronics refers to generating spin current by thermal gradient. Here we report a theoretical study demonstrating giant spin caloritronic effects in a new class of materials, called spin semiconductors, which are characterized with a "spin gap," the energy gap between spin-up and -down channels. Generally, spin Seebeck coefficient (Ss ) is shown to increase linearly with the spin gap. Specifically, unprecedented large Ss ∼ 3.4 mV/K and spin figure of merit ZsT ∼ 119 were found in spin-semiconducting graphene nanoribbons (GNRs) with sawtooth (ST) zigzag edges, based on first-principles calculations. Such giant spin caloritronic effects are shown to originate from a large spin gap of ST GNRs, in addition to two other spin-independent features of large band gap and narrow bandwidth which are commonly known for good thermoelectric materials. Our studies suggest that spin-semiconducting nanostructures, such as ST GNRs, are promising candidates for room-temperature spin caloritronics with high efficiency. |
| Type |
Text |
| Publisher |
American Physical Society |
| Volume |
90 |
| Issue |
12 |
| First Page |
121403-1 |
| Last Page |
121403-5 |
| Language |
eng |
| Bibliographic Citation |
Chen, X., Liu, Y., Gu, B.-L., Duan, W., & Liu, F. (2014). Giant room-temperature spin caloritronics in spin-semiconducting graphene nanoribbons. Physical Review B - Condensed Matter and Materials Physics, 90(12), 121403-1-121403-5. |
| Rights Management |
(c) American Physical Society http://dx.doi.org/DOI: 10.1103/PhysRevB.90.121403 |
| Format Medium |
application/pdf |
| Format Extent |
625,788 bytes |
| Identifier |
uspace,19019 |
| ARK |
ark:/87278/s6bp3bxw |
| Setname |
ir_uspace |
| ID |
712724 |
| Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6bp3bxw |
