5 papers
Three-Dimensional Atomic-Scale Structural Transformation in a SrTiO3 Grain Boundary
Xiaoyue Gao, Jiake Wei, Bo Han +9
Grain boundaries (GBs) in complex oxides play critical roles in governing their functional properties, which are intrinsically linked to their three-dimensional (3D) atomic configu…
Resolving Phonons in Superconductor Bi2Sr2CaCu2O8+δ at Sub-Unit-Cell Resolution
Xiaowen Zhang, Jiade Li, Xiaoyue Gao +9
The role of phonons in cuprates remains controversial, with their complex lattice structure complicating the investigation. Here, we identify phonon modes originating from charge r…
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…
Atomic-scale mechanism of enhanced electron-phonon coupling at the interface of MgB thin film
Xiaowen Zhang, Tiequan Xu, Ruochen Shi +7
In this study, we explore the heterointerface of MgB film on SiC substrate at atomic scale using electron microscopy and spectroscopy. We detect ~1 nm MgO between MgB and S…
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…