期刊
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
卷 128, 期 -, 页码 296-300出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2017.12.035
关键词
Photoelectron spectroscopy; Electronic structure; Ab initio calculations; Surface properties
资金
- Max Planck Society
- U.S. Department of Energy, Office of Science [DE-AC02-06CH11357]
- National Science Foundation [DMR-0703406]
- DFG [SCHO 1730/1-1]
In the field of Dirac materials, spin-orbit coupling (SOC) is usually considered disruptive, since it may lift degeneracies that are not protected by high-symmetry elements. Nonsymmorphic symmetries force degenerate points in the band structure at high-symmetry points that are not disrupted by SOC. The degeneracy is, however, often protected along whole high-symmetry lines or faces resulting in highly anisotropic crossings or nodal lines, which can considerably limit the region, in which the bands are linearly dispersed. It has been theoretically suggested that SOC could circumvent this problem. Here, we show experimentally that SOC can lift the extended protection in nonsymmorphic square-net compounds. We compare ZrSiS and CeSbTe, two materials with drastically different SOC, to show the effect of SOC on the band structure by means of angle-resolved photoemission spectroscopy and density functional theory calculations.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据