148 citations · 463 across the 16 of their papers we have counts for
16 papers
Strongly confined Mid-infrared to Terahertz Phonon Polaritons in Ultra-thin SrTiO3
Peiyi He, Jiade Li, Cong Li +7
Phonon polaritons (PhPs) enable subwavelength light control for infrared sensing, imaging, and optoelectronics, but conventional polar materials have narrow Reststrahlen bands, lim…
Atomic-scale observation of localized phonons at FeSe/SrTiO3 interface
Ruochen Sh, Qize Li, Xiaofeng Xu +11
In single unit-cell FeSe grown on SrTiO3, the superconductivity transition temperature features a significant enhancement. Local phonon modes at the interface associated with elect…
Thermodynamic behavior of correlated electron-hole fluids in van der Waals heterostructures
Ruishi Qi, Andrew Y. Joe, Zuocheng Zhang +12
Coupled two-dimensional electron-hole bilayers provide a unique platform to study strongly correlated Bose-Fermi mixtures in condensed matter. Electrons and holes in spatially sepa…
Atomically localized ingredient-dependent interface phonon in heterogeneous solids
Mei Wu, Ruochen Shi, Ruishi Qi +12
Phonons are the primary heat carriers in non-metallic solids. In compositionally heterogeneous materials, the thermal properties are believed to be mainly governed by the disrupted…
Phonon transition across an isotopic interface
Ning Li, Ruochen Shi, Yifei Li +13
Natural materials usually consist of isotopic mixtures, for which different isotopic ratios can lead to distinct material properties such as thermal conductivity and nucleation pro…
Charge transfer dynamics in MoSe/hBN/WSe heterostructures
Yoseob Yoon, Zuocheng Zhang, Ruishi Qi +6
Ultrafast charge transfer processes provide a facile way to create interlayer excitons in directly contacted transition metal dichalcogenide (TMD) layers. More sophisticated hetero…
Single-dislocation phonons: atomic-scale measurement and their thermal properties
Yuehui Li, Bo Han, Xiaolong Yang +12
Nanoscale defects such as dislocations, have a significant impact on the phonon thermal transport properties in non-metallic materials. To unravel these effects, understanding of d…
Direct observation of local antiferroelectricity induced phonon softening at a SrTiO3 defect
Bo Han, Ruochen Shi, Huining Peng +7
Defects in oxides usually exhibit exotic properties that may be associated with the local lattice dynamics. Here, at atomic spatial resolution, we directly measure phonon modes of…
Approaching the Purcell factor limit with whispering-gallery hyperbolic phonon polaritons in hBN nanotubes
Xiangdong Guo, Ning Li, Xiaoxia Yang +9
Enhanced light-matter interaction at the nanoscale is pivotal in the foundation of nonlinear optics, quantum optics, and nanophotonics, which are essential for a vast range of appl…
Atomic-Scale Probing of Heterointerface Phonon Bridges in Nitride Semiconductor
Yue-Hui Li, Rui-Shi Qi, Ruo-Chen Shi +12
Interface phonon modes that are generated by several atomic layers at the heterointerface play a major role in the interface thermal conductance for nanoscale high-power devices su…
Measuring phonon dispersion at an interface
Ruishi Qi, Ruochen Shi, Yuanwei Sun +9
The breakdown of translational symmetry at heterointerfaces leads to the emergence of new phonon modes localized near the interface. These interface phonons play an essential role…
Dynamics of Polar Skyrmion Bubbles under Electric Fields
Ruixue Zhu, Zhexin Jiang, Xinxin Zhang +18
Room-temperature polar skyrmion bubbles that are recently found in oxide superlattice, have received enormous interests for their potential applications in nanoelectronics due to t…
Four-dimensional Vibrational Spectroscopy for Nanoscale Mapping of Phonon Dispersion in BN Nanotubes
Ruishi Qi, Ning Li, Jinlong Du +8
Direct measurement of local phonon dispersion in individual nanostructures can greatly advance our understanding of their electrical, thermal, and mechanical properties. However, s…
Broad-Spectral-Range Sustainability and Controllable Excitation of Hyperbolic Phonon Polaritons in -MoO3
Weikang Dong, Ruishi Qi, Tiansheng Liu +8
Hyperbolic phonon polaritons (HPhPs) in orthorhombic-phase molybdenum trioxide (-MoO3) show in-plane hyperbolicity, great wavelength compression and ultra-long lifetime, therefo…
Anisotropic Moiré Optical Transitions in Twisted Monolayer/bilayer Phosphorene Heterostructures
Shilong Zhao, Erqing Wang, Ebru Alime Üzer +8
Moiré superlattices of van der Waals heterostructures provide a powerful new way to engineer the electronic structures of two-dimensional (2D) materials. Many novel quantum phenome…
Nanoscale Probing of Localized Surface Phonon Polaritons in SiC Nanorods with Swift Electrons
Yuehui Li, Ruishi Qi, Ruochen Shi +4
Surface phonon polaritons hold much potential for subwavelength control and manipulation of light at the infrared to terahertz wavelengths. Here, aided by monochromatic scanning tr…