Xuefen Cai

Jun 7, 2024 | link.aps.org | Qiu-Shi Huang |Xuefen Cai |Optoelectronic Engineering |Xie Zhang

Control of polymorphism in Ga2O3 poses a significant challenge. In this study, we investigate the phase stability and transitions of α-, β-, and κ-Ga2O3 structures using first-principles calculations.

Jun 5, 2024 | link.aps.org | Xuefen Cai |Optoelectronic Engineering |Su-Huai Wei

Forming a semiconductor alloy is a common practice to extend material properties for specific applications. While empirical continuous rules have been proposed and extensively validated to predict property changes in conventional alloys, there are certain isovalent alloys that exhibit discontinuous variations in electronic structures, defying the application of established rules. However, the underlying cause of this phenomenon has not been clearly stated.

Jan 9, 2024 | link.aps.org | Chen Zhang |Optoelectronics Engineering |Xuefen Cai

One of the central issues concerning unconventional superconductivity is the nature of the charge-density-wave (CDW) order and its implication for the pairing mechanism. Recently, a CDW order has been discovered in undoped infinite-layer NdNiO2 nickelates, which cannot be explained by popular Fermi-surface-based mechanisms (such as Fermi surface nesting or strong electron-phonon coupling) due to the observed insulating behavior.