The growing charge-density-wave order in CuTe lightens and speeds up electrons
學年 113
學期 1
出版（發表）日期 2024-10-29
作品名稱 The growing charge-density-wave order in CuTe lightens and speeds up electrons
作品名稱（其他語言）
著者 I-Ta Wang, Ta-Lei Chou, Chih-En Hsu, Zhujialei Lei, Li-Min Wang, Ping-Hui Lin, Chih-Wei Luo, Chun-Wei Chen, Chia-Nung Kuo, Chin Shan Lue, Cheng-Hsuan Chen, Hung-Chung Hsueh* & Ming-Wen Chu*
單位
出版者
著錄名稱、卷期、頁數 Nature Communications, vol. 15, p.9345
摘要 Charge density waves (CDWs) are pervasive orders in solids that usually enhance the effective mass (m*) and reduce the Fermi velocity (vF) of carriers. Here, we report on the inverse — a reduced m* and an enhanced correlated with the growth of the CDW order in CuTe with gapped, practically linearly dispersing bands — reminiscent of emergent CDW-gapped topological semimetals. Using momentum-dependent electron energy-loss spectroscopy (q-EELS), we simultaneously capture m* and of the CDW-related, practically linearly dispersing electrons by plasmon dispersions across the transition (335 K, TCDW), with m* of 0.28 m0 (m0, the electron rest mass) and of ~ 0.005c (c, the speed of light) at 300 K. With the growth of the CDW order-parameter strength toward 100 K, the electrons become lighter and move faster by ~ 20%. Thorough inspection below TCDW unveils the essential role of the increasing opening of the CDW gap. CuTe is a rich platform for the exploration of CDW/correlation physics with q-EELS established as a useful probe for this type of physics.
關鍵字
語言 zh_TW
ISSN
期刊性質 國外
收錄於 SCI Scopus
產學合作
通訊作者 Hung-Chung Hsueh and Ming-Wen Chu
審稿制度 否
國別 GBR
公開徵稿
出版型式 ,電子版,紙本
SDGS 優質教育