Dynamic Optical Tuning of Interlayer Interactions in the Transition Metal Dichalcogenides,Nano Letters

当前位置： X-MOL 学术 › Nano Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Dynamic Optical Tuning of Interlayer Interactions in the Transition Metal Dichalcogenides
Nano Letters ( IF 9.6 ) Pub Date : 2017-11-15 00:00:00 , DOI: 10.1021/acs.nanolett.7b03955
Ehren M. Mannebach ₁ , Clara Nyby ₂ , Friederike Ernst _{3,

4} , Yao Zhou ₁ , John Tolsma ₅ , Yao Li ₃ , Meng-Ju Sher _{6,

7} , I-Cheng Tung ₈ , Hua Zhou ₈ , Qi Zhang ₈ , Kyle L. Seyler ₉ , Genevieve Clark ₉ , Yu Lin _{6,

10} , Diling Zhu ₁₁ , James M. Glownia ₁₁ , Michael E. Kozina _{3,

6} , Sanghoon Song ₁₁ , Silke Nelson ₁₁ , Apurva Mehta ₁₁ , Yifei Yu ₁₂ , Anupum Pant ₁₃ , Ozgur Burak Aslan ₃ , Archana Raja _{3,

4} , Yinsheng Guo ₁₄ , Anthony DiChiara ₈ , Wendy Mao _{4,

6,

10} , Linyou Cao ₁₂ , Sefaattin Tongay ₁₃ , Jifeng Sun ₁₅ , David J. Singh ₁₅ , Tony F. Heinz _{3,

4,

6} , Xiaodong Xu ₉ , Allan H. MacDonald ₅ , Evan Reed _{1,

4} , Haidan Wen ₈ , Aaron M. Lindenberg _{1,

4,

6}

Affiliation

Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
Department of Chemistry, Stanford University, Stanford, California 94305, United States
Department of Applied Physics, Stanford University, Stanford, California 94305, United States
PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
Department of Physics, University of Texas, Austin, Austin, Texas 78712, United States
Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
Department of Physics, Wesleyan University, Middleton, Connecticut 06459, United States
Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
Department of Physics, University of Washington, Seattle, Washington 98195, United States
Department of Geological Sciences, Stanford University, Stanford, California 94305, United States
SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, Arizona 85287, United States
Department of Chemistry, Columbia University, New York, New York 10027, United States
Department of Physics and Astronomy, University of Missouri, Columbia, Missouri 65211-7010, United States

Modulation of weak interlayer interactions between quasi-two-dimensional atomic planes in the transition metal dichalcogenides (TMDCs) provides avenues for tuning their functional properties. Here we show that above-gap optical excitation in the TMDCs leads to an unexpected large-amplitude, ultrafast compressive force between the two-dimensional layers, as probed by in situ measurements of the atomic layer spacing at femtosecond time resolution. We show that this compressive response arises from a dynamic modulation of the interlayer van der Waals interaction and that this represents the dominant light-induced stress at low excitation densities. A simple analytic model predicts the magnitude and carrier density dependence of the measured strains. This work establishes a new method for dynamic, nonequilibrium tuning of correlation-driven dispersive interactions and of the optomechanical functionality of TMDC quasi-two-dimensional materials.

中文翻译：

过渡金属二硫属元素化物中层间相互作用的动态光学调谐。

过渡金属二卤化物（TMDC）中准二维原子平面之间的弱层间相互作用的调制提供了调节其功能性质的途径。在这里，我们显示，TMDC中的间隙上方光学激发会导致二维层之间出现意想不到的大振幅，超快压缩力，这是通过在飞秒时间分辨率下原子层间距的原位测量来探测的。我们表明，这种压缩响应是由层间范德华相互作用的动态调制引起的，并且这代表了在低激发密度下主要的光诱导应力。一个简单的分析模型可以预测所测应变的大小和载流子密度的依赖性。这项工作建立了一种新的动态方法，

更新日期：2017-11-15

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11