35 citations · 64 across the 8 of their papers we have counts for
8 papers
Magnetic domains reconfiguration on the Fe3O4(110) surface across the Verwey transition by Spin-Polarized Low-Energy Electron Microscopy
C. Gutiérrez-Cuesta, A. Mandziak, J. E. Prieto +6
We have studied the (110) surface of FeO single crystals by means of spin-polarized low-energy electron microscopy (SPLEEM). After preparation by sputtering and annealing a…
Insulator-to-Metal Transition and Anomalously Slow Hot Carrier Cooling in a Photo-doped Mott Insulator
Usama Choudhry, Jin Zhang, Kewen Huang +8
Photo-doped Mott insulators can exhibit novel photocarrier transport and relaxation dynamics and non-equilibrium phases. However, time-resolved real-space imaging of these processe…
Imaging Hot Photocarrier Transfer across a Semiconductor Heterojunction with Ultrafast Electron Microscopy
Basamat S. Shaheen, Kenny Huynh, Yujie Quan +5
Semiconductor heterojunctions have gained significant attention for efficient optoelectronic devices owing to their unique interfaces and synergistic effects. Interaction between c…
Mapping the Pathways of Photo-induced Ion Migration in Organic-inorganic Hybrid Halide Perovskites
Taeyong Kim, Soyeon Park, Vasudevan Iyer +7
Organic-inorganic hybrid perovskites (OIHPs) exhibiting exceptional photovoltaic and optoelectronic properties are of fundamental and practical interest, owing to their tunability…
Persistent hot carrier diffusion in boron arsenide single crystals imaged by ultrafast electron microscopy
Usama Choudhry, Fengjiao Pan, Taeyong Kim +6
Cubic boron arsenide (BAs) is promising for microelectronics thermal management due to its high thermal conductivity. Recently, its potential as an optoelectronic material is also…
Tutorial: Characterizing Microscale Energy Transport in Materials with Transient Grating Spectroscopy
Usama Choudhry, Taeyong Kim, Melanie Adams +3
Microscale energy transport processes are crucial in microelectronics, energy harvesting devices, and emerging quantum materials. To study these processes, methods that can probe t…
Transient strain induced electronic structure modulation in a semiconducting polymer imaged by scanning ultrafast electron microscopy
Taeyong Kim, Saejin Oh, Usama Choudhry +3
Understanding the opto-electronic properties of semiconducting polymers under external strain is essential for their applications in flexible opto-electronic, light-emitting and ph…
Coherent Phonon Transport in Two-dimensional Graphene Superstructures
Usama Choudhry, Shengying Yue, Bolin Liao
Coherent wave effects of thermal phonons hold promise of transformative opportunities in thermal transport control but remain largely unexplored due to the small wavelength of ther…