论文类型：期刊论文
第一作者：Qing-Bo Liu
通讯作者：Ruqian Wu
合写作者：Rui Yu,Hua-Hua Fu,Gang Xu
发表刊物：Journal of Physical Chemistry Letters
收录刊物：SCI
学科门类：理学
一级学科：物理学
文献类型：J
卷号：10
期号：14
页面范围：4045-4050
ISSN号：1948-7185
发表时间：2019-07-04
影响因子：6.71
摘要：The phononic topological Weyl closed nodal lines, including Weyl nodal rings, nodal chains, nodal nets, nodal links, and nodal knots, have been widely studied. The phononic topological Weyl open nodal lines (PTWONLs), however, have not been well investigated so far. By analyzing the coexistence of parity inversion and time-reversal symmetries, we found that the PTWONLs can be divided into three categories, with surface states hosting different shapes and positions in the Brillouin zone (BZ). Specifically, semiconducting Rb2Sn2O3 was found to exhibit perfect PTWONLs in its phonon spectrum, which fills up one of the categories. Numerical calculations showed that the drumhead-like surface states exist on the (010) surface and six PTWONLs appear in the first BZ due to the C3 rotation symmetry in the crystal structure. Their topological nontrivial nature was confirmed by calculating the Berry phase and by the linear phononic bands around the Weyl points. These theoretical findings provide a deep understanding into the phononic Weyl-open-nodal-line physics, and a promising candidate for experimental verification.
发布期刊链接：https://pubs.acs.org/doi/abs/10.1021/acs.jpclett.9b01159