6 papers · 1 filter
Monolithic integration of diverse crystalline thin films on diamond for near-junction thermal management
Tiancheng Zhao, Tianqi Bai, Yang He +20
The pursuit of extreme miniaturization and high power in 6G RF front-ends has cast thermal dissipation as the central challenge. Here, we have demonstrated the monolithic integrati…
Precise structure and polarization determination of Hf0.5Zr0.5O2 with electron ptychography
Xiaoyue Gao1, Zhuohui Liu, Bo Han +8
Hf0.5Zr0.5O2 (HZO) is a promising candidate for next generation ferroelectric memories and transistors. However, its ferroelectricity origin is still under debate due to the comple…
Single-atom-resolved vibrational spectroscopy of a dislocation
Hailing Jiang, Tao Wang, Zhenyu Zhang +10
Phonon resistance from dislocation scattering is often divided into short-range core interactions and long-range strain field interactions. Using electron energy-loss spectroscopy…
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…
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…
Correlating the Electronic Structures of Metallic/Semiconductor MoTe2 Interface to its Atomic Structures
Bo Han, Chen Yang, Xiaolong Xu +8
Contact interface properties are important in determining the performances of devices based on atomically thin two-dimensional (2D) materials, especially those with short channels.…