教師資料查詢 | 類別: 期刊論文 | 教師: 杜昭宏 Chao-hung Du (瀏覽個人網頁)

標題:Probing charge order and hidden topology at the atomic scale by cryogenic scanning transmission electron microscopy and spectroscopy
學年
學期
出版(發表)日期2021/03/18
作品名稱Probing charge order and hidden topology at the atomic scale by cryogenic scanning transmission electron microscopy and spectroscopy
作品名稱(其他語言)
著者M.-W. Chu; G. Y. Guo; W. T. Chen; M. H. Lee; S. H. Lee; Y.-C. Lai; C. H. Du; C. H. Chen
單位
出版者
著錄名稱、卷期、頁數PHYSICAL REVIEW B 103, 115130 (7 pages)
摘要Charge orders (COs) and entangled topology denote the fundamentals of correlated electron systems at low temperatures, and their profound revelation at atomic scale awaits experimental advances. Here, we report such a spatially resolved investigation using cryogenic atomic-scale electron microscopy and spectroscopy at 100 K, with the CO insulator of HgMn7O12 below 240 K as an exemplification. By the cryogenic technique, we can resolve the charge and lattice characteristics of the insulating CO phase at atomic resolution and identify the order parameters (OPs) at play as charge-density-modulated (∼31.4 Å, modulation length) and antiphase (∼10.5 Å) OPs. Both OPs are largely unaddressed forms of COs in correlated oxides and display the emergent topology of intertwining mesoscopic stripes of 10–40 nm in width and ≥500 nm in length, distinctly different from the atomically narrow CO stripes conventional to correlated systems and depicting the unique electronic contour of the phase. This preliminary demonstration of the cryogenic unveiling of the OPs and topological landscape paves the way to disentangling the multifarious COs and hidden topology in condensed matters and, meanwhile, calls for further developments in the atomic-scale cryogenic spectral probing at an enhanced speed.
關鍵字
語言英文(美國)
ISSN2469-9969
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別美國
公開徵稿
出版型式,電子版,紙本
相關連結
SDGs
  • 優質教育,產業創新與基礎設施
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