外加周期势的石墨烯中新产生的无质量狄拉克费米子
王惠
摘要(Abstract)：
研究了石墨烯外加渐变周期势时,会产生新的无质量狄拉克费米子。这些准粒子在超晶胞布里渊区边界附近产生,不同于原无质量狄拉克费米子,这些新的准粒子的群速具有各向异性。这些准粒子的波向量、广义赝自旋向量和群速不共线。此外还进一步发现,随着适当的三角对称周期势,会存在这些新的准粒子的能级窗,所以为实验研究新的无质量狄拉克费米子提供了一个很好的平台。
关键词(KeyWords)： 周期势;石墨烯;布里渊区;无质量狄拉克费米子
基金项目(Foundation):
作者(Author): 王惠
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