Ring-shaped crystals of NbSe3 and TaSe3
Ring-shaped crystals of NbSe3 and TaSe3
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NbSe3 和 TaSe3 环形晶体
DOI：
10.1051/jp4:199910101
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
K. Yamaya
中科院分区：
文献类型：
--
作者：
S. Tanda;H. Kawamoto;M. Shiobara;Y. Okajima;K. Yamaya
我们发现了新的环形和管状NbSe - 3晶体，并找到了可重复合成TaSe - 3美环和NbSe - 3的条件。我们通过x射线衍射证实了该环为单相NbSe - 3晶体，并且通过观察电子衍射峰的卫星，在140 K附近发生了电荷密度波（CDW）跃迁。卫星的位置与常规的NbSe - 3在CDW过渡时的位置一致。在环形晶体中也观察到由于CDW滑动引起的非线性传导。阈值场与传统的带状Nbse 3晶体相似。这些结果提供了cdw环存在的第一个证据。
We discover new ring- and tube-shaped crystals of NbSe 3 , and find a reproducibly synthesizing condition for TaSe 3 beautiful rings, as well as NbSe 3 . We confirm that the ring is a single-phase NbSe 3 crystal from the X-ray diffraction, and that a charge-density wave (CDW) transition takes place near 140 K by observing satellites of electron difraction peaks. The position of the satellites coincides with that of the conventional NbSe 3 at the CDW transition. The non-linear conduction due to the CDW sliding is also observed in the ring crystals. The threshold field is similar to the conventional ribbon-shaped Nbse 3 crystals. These results give the first evidences of existence of a CDW-ring.