Role of anisotropy in the Förster energy transfer from a semiconductor quantum well to an organic crystalline overlayer

Surface plasmons mediated energy transfer from a semiconductor quantum well to an organic overlayer

We consider the resonant energy transfer from a two-dimensional Wannier exciton (donor) to a Frenkel exciton of a molecular crystal overlayer (acceptor) when the active medias are separated by a metallic layer, possibly an electrode. We characterize the effect of the surface plasmon on this process. Using realistic values of material parameters, we show that it is possible to change the transfer rate within typically a factor of 5 (up to 44 according to geometrical configuration). We then take into account the quenching of the organic luminescence due to the proximity with the metal. This latt…

Tuning and Stabilizing Topological Insulator Bi2Se3 in the Intrinsic Regime by Charge Extraction with Organic Overlayers

In this work, we use charge extraction via organic overlayer deposition to lower the chemical potential of topological insulator Bi2Se3 thin films into the intrinsic (bulk-insulating) regime. We demonstrate the tuning and stabilization of intrinsic topological insulators at high mobility with low-cost organic films. With the protection of the organic charge extraction layers tetrafluorotetracyanoquinodimethane(F4TCNQ) or tris(acetylacetonato)cobalt(III) (Co(acac)3), the sample is stable in the atmosphere with chemical potential ~135 meV above the Dirac point (85 meV below the conduction band m…

具有可调工作温度的竞争性混合界面上的低能量、超快自旋重取向

Low-energy, ultrafast spin reorientation at competing hybrid interfaces with tunable operating temperature

本文展示了高磁化3d铁磁薄膜分子界面的自旋重取向跃迁，通过调节铁磁体厚度或分子覆盖层可在室温附近调控，并在跃迁温度附近实现低能量电学和光学超快易轴切换，为热辅助技术提供新途径。

揭示模板工程分子-石墨烯异质结构中的达维多夫分裂激子

Unveiling Davydov-Split Excitons in a Template-Engineered Molecular-Graphene Heterostructure

本研究通过模板工程分子-石墨烯异质结构揭示达维多夫分裂激子，利用高灵敏度光谱技术解析复杂振动能级，发现暗态分支主导辐射通道，为固态分子量子记忆发展提供新平台。

来自相似量子点阵列的可调能量与质量重整化

Tunable energy and mass renormalization from homothetic Quantum dot arrays

本研究针对相似量子点阵列的表面电子态调控问题，通过角分辨光电子能谱等实验结合理论模拟，发现Co配位金属有机网络可引发表面态能量下移、有效质量降低等重整化效应，揭示了吸附原子-衬底杂化的作用机制。