Magneto-optics of quasirelativistic electrons in graphene with an inplane electric field and in tilted Dirac cones in α-(BEDT TTF)2 I3
Magneto-optics of quasirelativistic electrons in graphene with an inplane electric field and in tilted Dirac cones in α-(BEDT TTF)2 I3
复制标题
具有面内电场的石墨烯中和 α-(BEDT TTF)2 I3 中倾斜狄拉克锥中的准相对论电子的磁光
DOI：
10.1103/physrevb.92.035306
复制
发表时间：
2015
影响因子：
3.7
通讯作者：
C. Tőke
中科院分区：
文献类型：
--
作者：
Judit S'ari;M. Goerbig;C. Tőke
无质量狄拉克费米子在几种准二维凝聚态物质中以低能模式出现
系统，如石墨烯，体拓扑绝缘体的表面，以及层状有机半导体。
当这类系统的旋转对称性被面内电场或本征倾斜降低时，
在狄拉克锥中，允许的偶极光学跃迁从少数几个选定的跃迁演变成一个宽扇形
带间跃迁我们表明，低能量载流子的洛伦兹协方差允许一个简洁的
磁光特性分析。我们预测，红外吸收光谱产生定量
关于有机化合物如α-（BEDT-TTF）2 I3中的倾斜狄拉克锥结构的信息。
Massless Dirac fermions occur as low-energy modes in several quasi-two-dimensional condensed matter
systems such as graphene, the surface of bulk topological insulators, and in layered organic semiconductors.
When the rotational symmetry in such systems is reduced either by an in-plane electric field or an intrinsic tilt
of the Dirac cones, the allowed dipolar optical transitions evolve from a few selected transitions into a wide fan
of interband transitions. We show that the Lorentz covariance of the low-energy carriers allows for a concise
analysis of the emergingmagneto-optical properties. We predict that infrared absorption spectra yield quantitative
information on the tilted Dirac cone structure in organic compounds such as α-(BEDT-TTF)2I3.