Quantum Coupling of Two Atomic Defects in a Carbon Nanotube Semiconductor
Quantum Coupling of Two Atomic Defects in a Carbon Nanotube Semiconductor
复制标题
碳纳米管半导体中两个原子缺陷的量子耦合
DOI：
10.1021/acs.jpclett.2c02439
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Wang, YuHuang
中科院分区：
文献类型：
--
作者：
Fortner, Jacob;Wang, YuHuang
化学缺陷可以在单壁碳纳米管的石墨晶格中产生有机色心。然而，基本的物理原理仍然是一个谜。在这里，我们展示了两个 sp3 原子缺陷可以以一种让人想起原子键合形成分子的方式相互作用。每个缺陷都会在纳米管半导体的带隙内产生类似原子的中带隙状态。当两个这样的缺陷彼此靠近时，相互作用形成一对分裂的轨道，类似于两个氢原子共价键合形成 H2 分子。这一意外发现可能有助于理解固体中原子缺陷的性质，并为这些色心的工程提供新的视角。
Chemical defects can create organic color centers in the graphitic lattice of single-walled carbon nanotubes. However, the underlying physics remains somewhat of a mystery. Here we show that two sp3atomic defects can interact with each other in a way reminiscent of atoms bonding to form molecules. Each defect creates an atom-like mid-gap state within the band gap of the nanotube semiconductor. Two such defects, when brought close to each other, interact to form a split pair of orbitals akin to two hydrogen atoms covalently bonding to form a H2molecule. This unexpected finding may help in understanding the nature of atomic defects in solids and provide a fresh perspective to the engineering of these color centers.