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:Two-dimensional Topological Crystalline Insulator Phase in Sb/Bi Planar Honeycomb with Tunable Dirac Gap
學年104
學期1
出版(發表)日期2016/01/14
作品名稱Two-dimensional Topological Crystalline Insulator Phase in Sb/Bi Planar Honeycomb with Tunable Dirac Gap
作品名稱(其他語言)
著者Chia-Hsiu Hsu; Zhi-Quan Huang; Christian P. Crisostomo; Liang-Zi Yao; Feng-Chuan Chuang; Yu-Tzu Liu; Baokai Wang; Chuang-Han Hsu; Chi-Cheng Lee; Hsin Lin; Arun Bansil
單位
出版者
著錄名稱、卷期、頁數Scientific Reports 6, 18993
摘要We predict planar Sb/Bi honeycomb to harbor a two-dimensional (2D) topological crystalline insulator (TCI) phase based on first-principles computations. Although buckled Sb and Bi honeycombs support 2D topological insulator (TI) phases, their structure becomes planar under tensile strain. The planar Sb/Bi honeycomb structure restores the mirror symmetry, and is shown to exhibit non-zero mirror Chern numbers, indicating that the system can host topologically protected edge states. Our computations show that the electronic spectrum of a planar Sb/Bi nanoribbon with armchair or zigzag edges contains two Dirac cones within the band gap and an even number of edge bands crossing the Fermi level. Lattice constant of the planar Sb honeycomb is found to nearly match that of hexagonal-BN. The Sb nanoribbon on hexagonal-BN exhibits gapped edge states, which we show to be tunable by an out-of-the-plane electric field, providing controllable gating of edge state important for device applications.
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語言英文
ISSN
期刊性質國外
收錄於SCI;
產學合作
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審稿制度
國別英國
公開徵稿
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