教師資料查詢 | 類別: 期刊論文 | 教師: 李啟正 LEE, CHI-CHENG (瀏覽個人網頁)

標題:Topological nodal-line fermions in spin-orbit metal PbTaSe2
學年104
學期2
出版(發表)日期2016/02/02
作品名稱Topological nodal-line fermions in spin-orbit metal PbTaSe2
作品名稱(其他語言)
著者Guang Bian; Tay-Rong Chang; Raman Sankar; Su-Yang Xu; Hao Zheng; Titus Neupert; Ching-Kai Chiu; Shin-Ming Huang; Guoqing Chang; Ilya Belopolski; Daniel S. Sanchez; Madhab Neupane; Nasser Alidoust; Chang Liu; BaoKai Wang; Chi-Cheng Lee; Horng-Tay Jeng; Chenglong Zhang; Zhujun Yuan; Shuang Jia; Arun Bansil; Fangcheng Chou; Hsin Lin; M. Zahid Hasan
單位
出版者
著錄名稱、卷期、頁數Nature Communications 7, 10556
摘要Topological semimetals can support one-dimensional Fermi lines or zero-dimensional Weyl points in momentum space, where the valence and conduction bands touch. While the degeneracy points in Weyl semimetals are robust against any perturbation that preserves translational symmetry, nodal lines require protection by additional crystalline symmetries such as mirror reflection. Here we report, based on a systematic theoretical study and a detailed experimental characterization, the existence of topological nodal-line states in the non-centrosymmetric compound PbTaSe2 with strong spin-orbit coupling. Remarkably, the spin-orbit nodal lines in PbTaSe2 are not only protected by the reflection symmetry but also characterized by an integer topological invariant. Our detailed angle-resolved photoemission measurements, first-principles simulations and theoretical topological analysis illustrate the physical mechanism underlying the formation of the topological nodal-line states and associated surface states for the first time, thus paving the way towards exploring the exotic properties of the topological nodal-line fermions in condensed matter systems.
關鍵字
語言英文
ISSN
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別英國
公開徵稿
出版型式,電子版
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