206 citations · 867 across the 21 of their papers we have counts for
21 papers
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…
Atomic-scale imaging of CH3NH3PbI3 structure and its decomposition pathway
Shulin Chen, Changwei Wu, Bo Han +13
Understanding the atomic structure and structural instability of organic-inorganic hybrid perovskites is the key to appreciate their remarkable photoelectric properties and failure…
Unraveling intrinsic flexoelectricity in twisted double bilayer graphene
Yuhao Li, Xiao Wang, Deqi Tang +8
Moiré superlattices of two-dimensional (2D) materials with a small twist angle are thought to exhibit appreciable flexoelectric effect, though unambiguous confirmation of their fle…
Imaging graphene moiré superlattices via scanning Kelvin probe microscopy
Junxi Yu, Rajiv Giridharagopal, Yuhao Li +5
Moiré superlattices in van der Waals heterostructures are gaining increasing attention because they offer new opportunities to tailor and explore unique electronic phenomena when s…
Understanding the morphotropic phase boundary of perovskite solid solutions as a frustrated state
Ying Shi Teh, Jiangyu Li, Kaushik Bhattacharya
Perovskite solid solutions that have a chemical composition A(CDO with transition metals C and D substitutionally occupying the B site of a perovskite lattice are…
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…
Polar or nonpolar? That is not the question for perovskite solar cells
Boyuan Huang, Zhenghao Liu, Changwei Wu +4
Perovskite solar cell (PSC) is one of the most promising next generation photovoltaic technologies, and there are considerable interests in the role of possible polarization of org…
Transmission electron microscopy of organic-inorganic hybrid perovskites: myths and truths
Shulin Chen, Ying Zhang, Jinjin Zhao +8
Organic-inorganic hybrid perovskites (OIHPs) have attracted extensive research interest as a promising candidate for efficient and inexpensive solar cells. Transmission electron mi…
Solution Processed Large-scale Multiferroic Complex Oxide Epitaxy with Magnetically Switched Polarization
Cong Liu, Feng An, Paria S. M. Gharavi +21
Complex oxides with tunable structures have many fascinating properties, though high-quality complex oxide epitaxy with precisely controlled composition is still out of reach. Here…
Mapping Intrinsic Electromechanical Responses at the Nanoscale via Sequential Excitation Scanning Probe Microscopy Empowered by Deep Data
Boyuan Huang, Ehsan Nasr Esfahani, Jiangyu Li
Ever increasing hardware capabilities and computation powers have made acquisition and analysis of big scientific data at the nanoscale routine, though much of the data acquired of…
Piezoelectricity of Atomically Thin WSe2 via Laterally Excited Scanning Probe Microscopy
Ehsan Nasr Esfahani, Terrance Li, Bevin Huang +2
Lattices of odd-layered two-dimensional (2D) transition metal dichalcogenides (TMDs) such as WSe2 are non-centrosymmetric, and thus could possess linear piezoelectricity that is at…
Ferroic Domains of Alternating Polar and Nonpolar Orders Regulate Photocurrent in Single Crystalline CH3NH3PbI3 Films Self-grown on FTO/TiO2 Substrate
Boyuan Huang, Guoli Kong, Ehsan Nasr Esfahani +10
Photovoltaic conversion efficiency (PCE) of halide perovskite solar cells has risen spectacularly, yet the very crystalline structure of CH3NH3PbI3 remains ambiguous after extensiv…
Quardratic Electromechanical Strain in Silicon Investigated by Scanning Probe Microscopy
Junxi Yu, Ehsan Nasr Esfahani, Qingfeng Zhu +4
Piezoresponse force microscopy (PFM) is a powerful tool widely used to characterize piezoelectricity and ferroelectricity at the nanoscale. However, it is necessary to distinguish…
Phase-field modeling and electronic structural analysis of flexoelectric effect at 180° domain walls in ferroelectric PbTiO3
Yu-Jia Wang, Jiangyu Li, Yin-Lian Zhu +1
Flexoelectric effect is the coupling between strain, polarization and their gradients, which are prominent at the nanoscale. Although this effect is important to understand nanostr…
Imaging Ferroelectric Domains via Charge Gradient Microscopy Enhanced by Principal Component Analysis
Ehsan Nasr Esfahani, Xiaoyan Liu, Jiangyu Li
Local domain structures of ferroelectrics have been studied extensively using various modes of scanning probes at the nanoscale, including piezoresponse force microscopy (PFM) and…
Touching is believing: interrogating organometal halide perovskite solar cells at the nanoscale via scanning probe microscopy
Jiangyu Li, Boyuan Huang, Ehsan Nasr Esfahani +4
Halide perovskite solar cells based on CH3NH3PbI3 and related materials have emerged as the most exciting development in the next generation photovoltaic technologies, yet the micr…
Resolving Local Electrochemistry at the Nanoscale via Electrochemical Strain Microscopy: Modeling and Experiments
Ahmad Eshghinejad, Ehsan Nasr Esfahani, Chihou Lei +1
Electrochemistry is the underlying mechanism in a variety of energy conversion and storage systems, and it is well known that the composition, structure, and properties of electroc…
High density array of epitaxial BiFeO3 nanodots with robust and reversibly switchable topological domain states
Zhongwen Li, Yujia Wang, Guo Tian +18
The exotic topological domains in ferroelectrics and multiferroics have attracted extensive interest in recent years due to their novel functionalities and potential applications i…
Scanning Thermo-ionic Microscopy: Probing Nanoscale Electrochemistry via Thermal Stress-induced Oscillation
Ehsan Nasr Esfahani, Ahmad Eshghinejad, Yun Ou +3
A universal challenge facing the development of electrochemical materials is our lack of understanding of physical and chemical processes at local length scales in 10-100 nm regime…
Quantitative Nanoscale Mapping of Three-Phase Thermal Conductivities in Filled Skutterudites via Scanning Thermal Microscopy
Ehsan Nasr Esfahani, Feiyue Ma, Shanyu Wang +3
In the last two decades, a nanostructuring paradigm has been successfully applied in a wide range of thermoelectric materials, resulting in significant reduction in thermal conduct…
Mechanisms of Electromechanical Coupling in Strain Based Scanning Probe Microscopy
Qian Nataly Chen, Yun Ou, Feiyue Ma +1
Electromechanical coupling is ubiquitous in nature and underpins the functionality of materials and systems as diverse as ferroelectric and multiferroic materials, electrochemical…