Semimetal with both Rarita-Schwinger-Weyl and Weyl excitations
Semimetal with both Rarita-Schwinger-Weyl and Weyl excitations
复制标题
具有 Rarita-Schwinger-Weyl 和 Weyl 激发的半金属
DOI：
10.1103/physrevb.93.045113
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发表时间：
2016-01-12
影响因子：
3.7
通讯作者：
Yu, Yue
中科院分区：
文献类型：
--
作者：
Liang, Long;Yu, Yue
A relativistic spinor with spin 3/2 is historically called a Rarita-Schwinger spinor. The right-and left-handed chiral degrees of freedom for the massless Rarita-Schwinger spinor are independent and are thought of as the left and right Weyl fermions with helicity +/- 3/2. We study three orbital spin-1/2 Weyl semimetals in the strong spin-orbital coupling limit with time reversal symmetry breaking. We find that in this limit the systems can be a J(eff) = 1/2 Weyl semimetal or a J(eff) = 3/2 semimetal, depending on the Fermi level position. The latter near Weyl points includes degrees of freedom of both Rarita-Schwinger-Weyl and Weyl. A nonlocal potential separates the Weyl and Rarita-Schwinger-Weyl degrees of freedom, and a relativistic Rarita-Schwinger-Weyl semimetal emerges. This recipe can be generalized to a mulit-Weyl semimetal and Weyl fermions with pairing interaction to obtain high monopole charges. Similarly, a spatial-inversion-breaking Raita-Schwinger-Weyl semimetal may also emerge.
