Charge density wave and weak Kondo effect in a Dirac semimetal CeSbTe
Charge density wave and weak Kondo effect in a Dirac semimetal CeSbTe
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狄拉克半金属 CeSbTe 中的电荷密度波和弱近藤效应
DOI:
10.1007/s11433-020-1642-2
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发表时间:
2020-11
期刊:
影响因子:
--
通讯作者:
Yang Liu
中科院分区:
文献类型:
--
作者:
Peng Li;Baijing Lv;Yuan Fang;Wei Guo;Zhongzheng Wu;Yi Wu;Cheng-Maw Cheng;Dawei Shen;Yuefeng Nie;Luca Petaccia;Chao Cao;Zhu-An Xu;Yang Liu
Using angle-resolved photoemission spectroscopy (ARPES) and low-energy electron diffraction (LEED), together with density-functional theory (DFT) calculation, we report the formation of charge density wave (CDW) and its interplay with the Kondo effect and topological states in CeSbTe. The observed Fermi surface (FS) exhibits parallel segments that can be well connected by the observed CDW ordering vector, indicating that the CDW order is driven by the electron-phonon coupling (EPC) as a result of the nested FS. The CDW gap is large (∼0.3 eV) and momentum-dependent, which naturally explains the robust CDW order up to high temperatures. The gap opening leads to a reduced density of states (DOS) near the Fermi level (EF), which correspondingly suppresses the many-body Kondo effect, leading to very localized 4f electrons at 20 K and above. The topological Dirac cone at theXpoint is found to remain gapless inside the CDW phase. Our results provide evidence for the competition between CDW and the Kondo effect in a Kondo lattice system. The robust CDW order in CeSbTe and related compounds provide an opportunity to search for the long-sought-after axionic insulator.
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影响因子:
3.7
作者:
Wang, Zhijun;Sun, Yan;Fang, Zhong
通讯作者:
Fang, Zhong
DOI:
10.1017/cbo9781139207249.009
发表时间:
2012
期刊:
--
影响因子:
--
作者:
W. Marsden
通讯作者:
W. Marsden
影响因子:
3.7
作者:
Eunsook Lee;D. Kim;J. Denlinger;Junwon Kim;Kyoo Kim;Byoung-Moo Min;B. Min;Y. Kwon;Jung-Ha Kang
通讯作者:
Eunsook Lee;D. Kim;J. Denlinger;Junwon Kim;Kyoo Kim;Byoung-Moo Min;B. Min;Y. Kwon;Jung-Ha Kang
DOI:
10.1088/0953-8984/16/50/007
发表时间:
2004-12
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
作者:
J. Kang;C. G. Olson;Y. Kwon;S. W. Han;K. Kim;A. Sekiyama;S. Kasai;S. Suga;B. Min
通讯作者:
J. Kang;C. G. Olson;Y. Kwon;S. W. Han;K. Kim;A. Sekiyama;S. Kasai;S. Suga;B. Min
影响因子:
4
作者:
Topp, Andreas;Vergniory, Maia G.;Schoop, Leslie M.
通讯作者:
Schoop, Leslie M.