...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Spin-dependent Seebeck effect and spin caloritronics in magnetic graphene
【24h】

Spin-dependent Seebeck effect and spin caloritronics in magnetic graphene

机译：磁性石墨烯中自旋依赖性塞贝克效应和自旋热电子学

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We investigate the spin-dependent thermoelectric effects in magnetic graphene in both diffusive and ballistic regimes. Employing the Boltzmann and Landauer formalisms we calculate the spin and charge Seebeck coefficients (thermopower) in magnetic graphene varying the spin splitting, temperature, and doping of the junction. It is found that while in normal graphene the temperature gradient drives a charge current, in the case of magnetic graphene a significant spin current is also established. In particular we show that in the undoped magnetic graphene in which different spin carriers belong to conduction and valence bands, a pure spin current is driven by the temperature gradient. In addition it is revealed that profound thermoelectric effects can be achieved at intermediate easily accessible temperatures when the thermal energy is comparable with Fermi energy k_B T approx＜ μ. By further investigation of the spin-dependent Seebeck effect and a significantly large figure of merit for spin thermopower Z_(sp)T, we suggest magnetic graphene as a promising material for spin-caloritronics studies and applications.
机译：我们研究了磁性石墨烯在扩散和弹道体制中自旋相关的热电效应。利用Boltzmann和Landauer形式主义，我们计算了磁性石墨烯中的自旋和电荷塞贝克系数（热功率），从而改变了结的自旋分裂，温度和掺杂。发现在正常石墨烯中，温度梯度会驱动充电电流，而在磁性石墨烯的情况下，也会建立明显的自旋电流。特别地，我们显示出在不同自旋载流子属于导带和价带的未掺杂磁性石墨烯中，纯自旋电流受温度梯度的驱动。此外，还揭示出，当热能与费米能k_B T ＜＜μ相当时，在中等容易达到的温度下可以实现深远的热电效应。通过进一步研究自旋依赖性塞贝克效应和自旋热功率Z_（sp）T的显着优点，我们建议将磁性石墨烯用作自旋量热电子学和应用的有前途的材料。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号