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Three‐Dimensional Dirac Semimetal β ‐PbO 2
Author(s) -
Wang Wei,
Deng Linjie,
Jiao Na,
Zhou Pan,
Sun Lizhong
Publication year - 2017
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201700271
Subject(s) - semimetal , dirac (video compression format) , physics , condensed matter physics , band gap , quantum mechanics , neutrino
Based on first‐principles calculation, we found a new type of three‐dimensional (3D) topological semimetal: β ‐PbO 2 . When spin–orbit coupling (SOC) is ignored, β ‐PbO 2 behaves as a node‐line semimetal, but in the presence of SOC, the system turns into 3D Dirac semimetal, and the Dirac points are protected by C 4 crystal symmetry. Moreover, the surface states and Fermi arcs on the semi‐infinite edge clearly reveal its topological nature. Therefore, β ‐PbO 2 provides a flexible platform for exploring exotic physical phenomena of Dirac semimetals.