學年
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112 |
學期
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2 |
出版(發表)日期
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2024-06-11 |
作品名稱
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Revealing the Charge Density Wave Caused by Peierls Instability in Two-Dimensional NbSe2 |
作品名稱(其他語言)
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著者
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Yung-Ting Lee, Po-Tuan Chen, Zheng-Hong Li, Jyun-Yu Wu, Chia-Nung Kuo, Chin Shan Lue, Chien-Te Wu, Chien-Cheng Kuo, Cheng-Tien Chiang, Taisuke Ozaki, Chun-Liang Lin, Chi-Cheng Lee, Hung-Chung Hsueh (薛宏中), and Ming-Chiang Chung |
單位
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出版者
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著錄名稱、卷期、頁數
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ACS Materials Letters 6(1), p.2941-2947 |
摘要
|
The formation of a charge density wave (CDW)
in 2D materials caused by Peierls instability is a controversial
topic. This study investigates the extensively debated role of
Fermi surface nesting in causing the CDW state in 2H-NbSe2
materials. Four NbSe2 structures are identified on the basis of
the characteristics in scanning tunneling microscopy images
and first-principles simulations. The calculations reveal that an
energetically favored filled phase corresponds to Peierls’
description with fully opened gaps at the CDW Brillouin zone
boundary, resulting in a drop at the Fermi level in the density of
states and scanning tunneling spectroscopy spectra. The
electronic susceptibility and phonon instability indicate that
the Fermi surface nesting is triggered by two nesting vectors,
whereas the involvement of only one nesting vector leads to a so-called stripe phase. This comprehensive study demonstrates
that the filled phase of NbSe2 can be categorized as a Peierls instability-induced CDW in two-dimensional systems. |
關鍵字
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語言
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en_US |
ISSN
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期刊性質
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國外 |
收錄於
|
SCI
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產學合作
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通訊作者
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Hung-Chung Hsueh (薛宏中), Chun-Liang Lin, Chi-Cheng Lee, and Ming-Chiang Chung |
審稿制度
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0 |
國別
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TWN |
公開徵稿
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出版型式
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,電子版,紙本 |
SDGS
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優質教育
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