1.3k citations · 1.8k across the 6 of their papers we have counts for
7 papers
Gravitational freeze-in dark matter from Higgs Preheating
Ruopeng Zhang, Zixuan Xu, Sibo Zheng
Gravitational freeze-in is a mechanism to explain the observed dark matter relic density if dark matter neither couples to inflation nor to standard model sector. In this work, we…
Freeze-in Dark Matter via Lepton Portal: Hubble Tension and Stellar Cooling
Zixuan Xu, Shuai Xu, Ruopeng Zhang +1
We propose a new freeze-in dark matter candidate which feebly couples to the standard model charged leptons. The feeble interactions allow it (i) to freeze-in from the Standard Mod…
Fabrication of Specimens for Atom Probe Tomography Using a Combined Gallium and Neon Focused Ion Beam Milling Approach
Frances I. Allen, Paul T. Blanchard, Russell Lake +6
We demonstrate a new focused ion beam sample preparation method for atom probe tomography. The key aspect of the new method is that we use a neon ion beam for the final tip-shaping…
Exceptional fracture toughness of CrCoNi-based medium- and high-entropy alloys close to liquid helium temperatures
Dong Liu, Qin Yu, Saurabh Kabra +10
Medium- and high-entropy alloys based on the CrCoNi-system have been shown to display outstanding strength, tensile ductility and fracture toughness (damage-tolerance properties),…
Complex Field Inflation
Ruopeng Zhang, Sibo Zheng
We report first study of complex field inflation. Although understood as a specific two-field inflation, a complex field inflation is able to make more robust model predictions on…
Twin-Boundary Structural Phase Transitions in Elemental Titanium
Mohammad S. Hooshmand, Ruopeng Zhang, Yan Chong +5
Twinning in crystalline materials plays an important role in many transformation and deformation processes, where underlying mechanisms can be strongly influenced by the structural…
Verification of Short-Range Order and Its Impact on the Properties of the CrCoNi Medium Entropy Alloy
Ruopeng Zhang, Shiteng Zhao, Jun Ding +6
Traditional metallic alloys are mixtures of elements where the atoms of minority species tend to distribute randomly if they are below their solubility limit, or lead to the format…