148 citations · 640 across the 14 of their papers we have counts for
9 papers · 1 filter
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…
Engineering of Atomic-Scale Flexoelectricity at Grain Boundaries
Mei Wu, Xiaowei Zhang, Xiaomei Li +9
Flexoelectricity is a type of ubiquitous and prominent electromechanical coupling, pertaining to the response of electrical polarization to mechanical strain gradients while not re…
Manipulation of polar vortex chirality in oxide superlattices
Pan Chen, Congbing Tan, Zhexin Jiang +18
Topological polar vortices that are the electric analogues of magnetic objects, present great potential in applications of future nanoelectronics due to their nanometer size, anoma…
Creating topological polar structure in a nonpolar matter
Adeel Y. Abid, Yuanwei Sun, Xu Hou +15
Nontrivial topological structures offer rich playground in condensed matter physics including fluid dynamics, superconductivity, and ferromagnetism, and they promise alternative de…
Eightfold Fermionic Excitation in a Charge Density Wave Compound
Xi Zhang, Qiangqiang Gu, Haigen Sun +19
Unconventional quasiparticle excitations in condensed matter systems have become one of the most important research frontiers. Beyond two- and fourfold degenerate Weyl and Dirac fe…
Atomic-scale observations of electrical and mechanical manipulation of topological polar flux-closure
Xiaomei Li, Congbing Tan, Peng Gao +12
The ability to controllably manipulate the complex topological polar configurations, such as polar flux-closure via external stimuli, enables many applications in electromechanical…
Atomic Origin of Spin-Valve Magnetoresistance at the SrRuO3 Grain Boundary
Xujing Li, Li Yin, Zhengxun Lai +14
Defects ubiquitously exist in crystal materials and usually exhibit a very different nature than the bulk matrix, and hence, their presence can have significant impacts on the prop…
Atomic Imaging of Mechanically Induced Topological Transition of Ferroelectric Vortices
Pan Chen, Xiangli Zhong, Jacob A. Zorn +14
Ferroelectric vortices formed through complex lattice-charge interactions have great potential in applications for future nanoelectronics such as memories. For practical applicatio…
Probing lattice vibration at surface and interface of SiO/Si with nanometer resolution
Yuehui Li, Mei Wu, Ning Li +6
Recent advances in monochromatic aberration corrected electron microscopy make it possible to detect the lattice vibration with both high-energy resolution and high spatial resolut…