Coexistence of Two Types of Spin Splitting Originating from Different Symmetries

Koichiro Yaji, Anton Visikovskiy, Takushi Iimori, Kenta Kuroda, Singo Hayashi, Takashi Kajiwara, Satoru Tanaka, Fumio Komori, Shik Shin

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

The symmetry of a surface or interface plays an important role in determining the spin splitting and texture of a two-dimensional band. Spin-polarized bands of a triangular lattice atomic layer (TLAL) consisting of Sn on a SiC(0001) substrate is investigated by spin- and angle-resolved photoelectron spectroscopy. Surprisingly, both Zeeman- and Rashba-type spin-split bands, without and with spin degeneracy, respectively, coexist at a K point of the Sn TLAL. The K point has a threefold symmetry without inversion symmetry according to the crystal structure including the SiC periodicity, meaning that the Zeeman-type is consistent with the symmetry of the lattice while the Rashba-type is inconsistent. Our density functional calculations reveal that the charge density distribution of the Rashba-type (Zeeman-type) band shows (no) inversion symmetry at the K point. Therefore, the symmetry of the charge density distribution agrees with both types of the spin splitting.

本文言語英語
論文番号126403
ジャーナルPhysical review letters
122
12
DOI
出版ステータス出版済み - 3 29 2019

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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