26 citations · 85 across the 22 of their papers we have counts for
22 papers
Atomic-Scale Observation of Symmetry Breaking in Altermagnetic MnTe
Guodong Ren, Jonathan M. DeStefano, Xiao-Wei Zhang +20
The recent discovery of altermagnetism has sparked growing interest in compensated magnetic systems as promising platforms for highly scalable spintronics. Altermagnetism is a dist…
Twist-induced Out-of-plane Ferroelectricity in Bilayer Hafnia
Jian Huang, Gwan Yeong Jung, Pravan Omprakash +6
Ferroelectric HfO2 is a promising candidate for next-generation memory devices due to its CMOS compatibility and ability to retain polarization at nanometer scales. However, the po…
Tripling of the Superconducting Critical Current Density in BaFe(AsP) Retained After Pressure Release
Jiangteng Liu, Alex Lopez, Daniel Slone +5
Superconducting performance is tunable not only via chemical modification or defect engineering, but also through external parameters such as pressure, though this method remains l…
Unveiling the Shortwave Absorption Spectra of Alumina Aerosols: Implications for Solar Radiation Modification
Taveen Singh Kapoor, Prabhav Upadhyay, Jian Huang +12
Alumina is proposed for Stratospheric Aerosol Injection (SAI)-based solar radiation modification due to its presumed ability to scatter sunlight strongly while absorbing weakly. Al…
Hole-doping reduces the coercive field in ferroelectric hafnia
Pravan Omprakash, Gwan Yeong Jung, Guodong Ren +1
Ferroelectric hafnia (HfO2) holds promise for next-generation memory and logic applications because of its CMOS compatibility. However, the high coercive field required for polariz…
Sub-nm2 ferroelectric domains via charged 180 degree walls in ZrO2
Nashrah Afroze, Hamoon Fahrvandi, Guodong Ren +31
Flat phonon bands in fluorite ferroelectrics (HfO2 or ZrO2) shrink polar domains laterally to an irreducible half-unit-cell width (0.27 nm) within which the vertical arrangement of…
Towards Atomic-Scale Control over Structural Modulations in Quasi-1D Chalcogenides for Colossal Optical Anisotropy
Guodong Ren, Shantanu Singh, Gwan Yeong Jung +10
Optically anisotropic materials are sought after for tailoring the polarization of light. Recently, colossal optical anisotropy was reported in a quasi-one-dimensional chalcogenide…
Strong tunability of epitaxial relationship and reconstruction at improper ferroelectric interface
Xin Li, Yu Yun, Guodong Ren +4
The atomic structures at epitaxial film-substrate interfaces determine scalability of thin films and can result in new phenomena. However, it is challenging to control the interfac…
Antiferroelectricity with metastable polar state from Kittel model
Amit Kumar Shah, Xin Li, Guodong Ren +3
We have revisited the Kittel model that describes antiferroelectricity (AFE) in terms of two sublattices of spontaneous polarization with antiparallel couplings. By constructing th…
Giant coercivity and enhanced intrinsic anomalous Hall effect at vanishing magnetization in a compensated kagome ferrimagnet
Jonathan M. DeStefano, Elliott Rosenberg, Guodong Ren +9
Ferrimagnets that can be driven to magnetic compensation show promise for use in spintronics as they exhibit a finite anomalous Hall effect at zero magnetic field without having a…
Polarization Pinning at Antiphase Boundaries in Multiferroic YbFeO
Guodong Ren, Pravan Omprakash, Xin Li +4
The switching characteristics of ferroelectrics and multiferroics are influenced by the interaction of topological defects with domain-walls. We report on the pinning of polarizati…
Improper flexoelectricity in hexagonal rare-earth ferrites
Xin Li, Guodong Ren, Yu Yun +5
Flexoelectricity is a universal effect that generates electric polarization due to broken inversion symmetry caused by local strain gradient. The large strain gradient at nanoscale…
Strain-driven stabilization of a room-temperature chiral multiferroic with coupled ferroaxial and ferroelectric order
Guodong Ren, Gwan Yeong Jung, Huandong Chen +9
Noncollinear ferroic materials are sought after as testbeds to explore the intimate connections between topology and symmetry, which result in electronic, optical and magnetic func…
Antiferroelectric Hafnia Down to the 2D Limit
Xin Li, Guodong Ren, Haidong Lu +16
Antiferroelectricity is a material property characterized by alternating electric dipoles spontaneously ordered in antiparallel directions. Antiferroelectrics are promising for ene…
Emergent Atomic Scale Polarisation Vortices in BaTiS3
Boyang Zhao, Gwan Yeong Jung, Shantanu Singh +21
Topological defects, such as vortices and skyrmions in magnetic and dipolar systems, can give rise to properties that are not observed in typical magnets and dielectrics. Here, we…
Molten flux growth of single crystals of quasi-1D hexagonal chalcogenide BaTiS3
Huandong Chen, Shantanu Singh, Hongyan Mei +7
BaTiS3, a quasi-1D complex chalcogenide, has gathered considerable scientific and technological interest due to its giant optical anisotropy and electronic phase transitions. Howev…
Giant Modulation of Refractive Index from Picoscale Atomic Displacements
Boyang Zhao, Guodong Ren, Hongyan Mei +21
Structural disorder has been shown to enhance and modulate magnetic, electrical, dipolar, electrochemical, and mechanical properties of materials. However, the possibility of obtai…
Topological interfacial states in ferroelectric domain walls of two-dimensional bismuth
Wei Luo, Yang Zhong, Hongyu Yu +4
Using machine learning methods, we explore different types of domain walls in the recently unveiled single-element ferroelectric, the bismuth monolayer [Nature 617, 67 (2023)]. Rem…
Colossal optical anisotropy from atomic-scale modulations
Hongyan Mei, Guodong Ren, Boyang Zhao +17
In modern optics, materials with large birefringence (Δn, where n is the refractive index) are sought after for polarization control (e.g. in wave plates, polarizing beam splitters…
Stabilizing polar phases in binary metal oxides by hole doping
Tengfei Cao, Guodong Ren, Ding-Fu Shao +2
The recent observation of ferroelectricity in the metastable phases of binary metal oxides, such as HfO2, ZrO2, Hf0.5Zr0.5O2, and Ga2O3, has garnered a lot of attention. These meta…
Quasi-epitaxial growth of BaTiS films
M. Surendran, B. Zhao, G. Ren +7
Perovskite chalcogenides have emerged as a new class of semiconductors with tunable band gap in the visible-infrared region. High quality thin films are critical to understand the…
Orientation Controlled Anisotropy in Single Crystals of Quasi-1D BaTiS3
Boyang Zhao, Md Shafkat Bin Hoque, Gwan Yeong Jung +17
Low-dimensional materials with chain-like (one-dimensional) or layered (twodimensional) structures are of significant interest due to their anisotropic electrical, optical, thermal…