8 papers
Impact of Phonon-Magnon Scattering on Thermal Transport across Antiferromagnetic and Ferromagnetic Oxides
Zeyu Xiang, Bolin Liao
Phonon--magnon coupling has been extensively studied in ferromagnets, whereas its microscopic mechanisms in antiferromagnets remain less understood. Here, we combine first-principl…
Slow Thermalization and Long-Lived Coherence across Acoustic Phonon Branches in BAs
Zeyu Xiang, Ying Peng, Ange Benise Niyikiza +11
The exceptionally high thermal conductivity of cubic boron arsenide (BAs) arises from suppressed three-phonon scattering associated with its large acoustic--optical gap. In this re…
Reversible Modulation of Thermal Conductivity in GaN through Strain-Field Screening around Dislocations
Shantal Adajian, Fanghao Zhang, Andrew Christison +9
Crystalline defects are generally regarded as static phonon scatterers that irreversibly suppress thermal transport. Here we show that elastic strain can reversibly modify dislocat…
Coupled Spin-lattice Dynamics across a Magnetostructural Phase Transition
Lokanath Patra, Zeyu Xiang, Yubi Chen +1
First-order magnetostructural phase transitions underpin giant magnetocaloric effects, yet the microscopic role of lattice dynamics in these transitions remains controversial. Here…
Thermal conductivity of boron arsenide above 2100 watts per meter per Kelvin at room temperature
Ange Benise Niyikiza, Zeyu Xiang, Fanghao Zhang +6
Boron arsenide (BAs) single crystals had been previously reported to have thermal conductivity of 1500 W/mK at room temperature. Now we achieved thermal conductivity above 2100 W/m…
High-throughput Discovery of Anti-gap Semiconductors
Zeyu Xiang, Fanghao Zhang, Bolin Liao
Conventional semiconductors typically have bonding states near the valence band maximum (VBM) and antibonding states near the conduction band minimum (CBM). Semiconductors with the…
High-Throughput Search for Photostrictive Materials based on a Thermodynamic Descriptor
Zeyu Xiang, Yubi Chen, Yujie Quan +1
Photostriction is a phenomenon that can potentially improve the precision of light-driven actuation, the sensitivity of photodetection, and the efficiency of optical energy harvest…
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…