Defect-mediated condensation of a charge density wave
Defect-mediated condensation of a charge density wave
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DOI：
10.1126/science.285.5436.2107
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发表时间：
1999-09-24
期刊：
影响因子：
56.9
通讯作者：
Plummer, EW
中科院分区：
文献类型：
--
作者：
Weitering, HH;Carpinelli, JM;Plummer, EW
对称性、维度和无序性在临界现象中起着关键作用。利用扫描隧道显微镜的原子成像能力，直接观察了二维电荷密度波(CDW)系统中电荷密度振荡与晶格缺陷之间的相互作用，点缺陷作为CDW的成核中心，随着温度的降低，形成被原子突变的电荷边界隔开的钉扎的CDW磁区。置换无序在低温下的不完全冻结表明了一种新的CDW介导的钉扎中心跳跃。
Symmetry, dimensionality, and disorder play a pivotal role in critical phenomena. The atomic imaging capabilities of the scanning tunneling microscope were used to directly visualize the interaction between charge density oscillations and Lattice defects in a two-dimensional charge density wave (CDW) system, point defects act as nucleation centers of the CDW, which, as the temperature is Lowered, results in the formation of pinned CDW domains that are separated by atomically abrupt charge boundaries. Incomplete freezing of substitutional disorder at low temperature indicates a novel CDW-mediated hopping of pinning centers.