Resources

Author(s): Zheng Qi et al. A direct-amplification-enabled harmonic generation free-electron laser has been realized experimentally as a robust external-seeding technique combining substantial seed amplification with high-order harmonic generation. [Phys. Rev. Lett. 135, 035001] Published Thu Jul 17, 2025

Author(s): Yu Jin, Jinsoo Park, Marquis M. McMillan, Daniel Donghyon Ohm, Corrie Barnes, Benjamin Pingault, Christopher Egerstrom, Benchen Huang, Marco Govoni, F. Joseph Heremans, David D. Awschalom, and Giulia Galli A first-principles framework accurately estimates the nonradiative intersystem crossing rates in optically active solid state qubits. [Phys. Rev. Lett. 135, 036401] Published Thu Jul 17, 2025

Author(s): D. Šabani, C. Bacaksiz, and M. V. Milošević A new method where orbitally–resolved magnetic exchange parameters are determined by electron hopping parameters pinpoints the specific orbital interactions that govern magnetic exchange. [Phys. Rev. Lett. 135, 036704] Published Thu Jul 17, 2025

Author(s): R. L. Lysak, A. H. Sulaiman, S. S. Elliott, W. S. Kurth, and S. J. Bolton A spacecraft observes a new oscillation mode in the low-density plasma. [Phys. Rev. Lett. 135, 035201] Published Wed Jul 16, 2025

Author(s): Xin Liang Tan, Arthur Ernst, Kenta Hagiwara, Ying-Jiun Chen, Claus Michael Schneider, and Christian Tusche A 2D version of a half-metal—a spin-selective electrical conductor—could aid spin-based electronics. [Phys. Rev. Lett. 135, 036703] Published Wed Jul 16, 2025

Author(s): R. Abbasi et al. (IceCube Collaboration) Failing to see any high-energy neutrinos allowed researchers to calculate an upper limit on the fraction of high-energy cosmic rays that are protons. [Phys. Rev. Lett. 135, 031001] Published Tue Jul 15, 2025

Author(s): Mason C. Marshall, Daniel A. Rodriguez Castillo, Willa J. Arthur-Dworschack, Alexander Aeppli, Kyungtae Kim, Dahyeon Lee, William Warfield, Joost Hinrichs, Nicholas V. Nardelli, Tara M. Fortier, Jun Ye, David R. Leibrandt, and David B. Hume A new trap design with reduced micromotion, more accurate measurements of the ion’s Doppler-cooled temperature and differential polarizability by Doppler cooling light, and improved laser stabilization...