Primary role of the barely occupied states in the charge density wave formation of NbSe2.
Primary role of the barely occupied states in the charge density wave formation of NbSe2.
复制标题
NbSe2 电荷密度波形成中几乎不占据的状态的主要作用。
DOI:
10.1103/physrevlett.101.226406
复制
发表时间:
2008
影响因子:
8.6
通讯作者:
D. Feng
中科院分区:
文献类型:
--
作者:
D. Shen;Yan Zhang;Lexian Yang;J. Wei;H. Ou;J. Dong;B. Xie;C. He;J. Zhao;Bo Zhou;M. Arita;K. Shimada;H. Namatame;M. Taniguchi;J. Shi;D. Feng
NbSe2 is a prototypical charge-density-wave (CDW) material, whose mechanism remains mysterious so far. With angle resolved photoemission spectroscopy, we recovered the long-lost nesting condition over a large broken-honeycomb region in the Brillouin zone, which consists of six saddle band point regions with high density of states (DOS), and large regions away from Fermi surfaces with negligible DOS at the Fermi energy. We show that the major contributions to the CDW formation come from these barely occupied states rather than the saddle band points. Our findings not only resolve a long-standing puzzle, but also overthrow the conventional wisdom that CDW is dominated by regions with high DOS.
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
V. Stankevich;S. Kimura;他8名;T. Ito;S. Kimura
通讯作者:
S. Kimura