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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Cooperative Phenomena in Artificial Solids Made from Silver Quantum Dots: Importance of Classical Coupling
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Cooperative Phenomena in Artificial Solids Made from Silver Quantum Dots: Importance of Classical Coupling

机译：银量子点制成的人造固体中的合作现象：经典耦合的重要性。

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摘要

Recent work has shown that metal quantum dots can be treated as "artificial atoms" and crystallized into "artificial solids" that have electronic properties that can be tuned by controlling interparticle coupling through the application of pressure. The interactions between the nanocrystals in such artificial solids are classified as either dipole or exchange.↑(1) Dipole (including many-body) coupling between nanocrystals is treated in a classical manner using an effective medium model that permits the calculation of both the linear and nonlinear optical spectra of the solid as the interparticle separation is continuously varied. We find agreement between the classical model and experimental linear reflectance data until the crystallites are separated by less than 10 #, after which they sharply diverge. We find that the classical model fails to predict the overall experimental trend in second-harmonic intensities.
机译：最近的工作表明，金属量子点可被视为“人工原子”，并结晶为具有可通过通过施加压力控制粒子间耦合来调节电子特性的“人工固体”。此类人工固体中的纳米晶体之间的相互作用分为偶极或交换。↑（1）使用有效的介质模型以经典方式处理纳米晶体之间的偶极（包括多体）耦合，该模型允许计算线性和固体的非线性光谱随着粒子间分离而连续变化。我们发现经典模型与实验线性反射率数据之间存在一致性，直到微晶间距小于10＃，之后它们急剧发散。我们发现经典模型无法预测二次谐波强度的总体实验趋势。

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