Indexed by: Journal paper

First Author: Qing-Bo Liu

Correspondence Author: Ruqian Wu

Co-author: Rui Yu,Hua-Hua Fu,Gang Xu

Journal: Journal of Physical Chemistry Letters

Included Journals: SCI

Discipline: Science

First-Level Discipline: Physics

Document Type: J

Volume: 10

Issue: 14

Page Number: 4045-4050

ISSN No.: 1948-7185

Date of Publication: 2019-07-04

Impact Factor: 6.71

Abstract: 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.

Links to published journals: https://pubs.acs.org/doi/abs/10.1021/acs.jpclett.9b01159