Vol. 124, No. 2, 2026

JETP Letters

Crystals Instead of Magnets: A New Approach to Accelerator Beam Control (Brief Review)

S. F. Reshetnikov, Yu. A. Chesnokov, and A. A. Yanovich p. 81 abstract

Changes in the Spectral Characteristics of Stimulated Brillouin Scattering with Variations in Excitation Geometry

M. Karpov, A. Kudryavtseva, T. Mironova, A. Salaridze, N. Tcherniega, and S. Umanskaya p. 92 abstract

Spatial Differentiation of Optical Signal Based on Fourier Filtering with Pixel and Gradient Metasurfaces

V. V. Yushkov, P. D. Kiryanov, A. S. Shorokhov, and A. A. Fedyanin p. 96 abstract

Amorphous Porous Water Structures for Hydrogen Storage

R. K. Zhdanov, K. V. Gets, Yu. Yu. Bozhko, and V. R. Belosludov p. 103 abstract

Classification of Phase States of the Ising Model Using a Graph Neural Network

P. A. Ovchinnikov, Z. A. Moskovchenko, M. E. Tsuranova, and K. S. Soldatov p. 110 abstract

Superconductivity of Ca-Doped (Li, Fe)OHFeSe

A. V. Palnichenko, I. I. Zver’kova, and O. M. Vyaselev p. 117 abstract

Magnetic States of a Finite-Length Mn Chain on a Pt(332) Surface in an External Magnetic Field

S. V. Kolesnikov, E. S. Glazova, and A. M. Saletsky p. 121 abstract

Optically Controlled Mesoscopic Spin Gate–Modulator

R. G. Nazmitdinov p. 128 abstract

Local Quench Within the Keldysh Technique: the Role of Interaction

D. V. Lopatin, A. A. Radovskaya, and A. G. Semenov p. 138 abstract

Operation of a Copper Vapor Laser at Pulse Repetition Frequencies up to 100 kHz with an Output Power Exceeding 200 W/m

P. A. Bokhan, P. P. Gugin, D. E. Zakrevsky, V. A. Kim, and M. A. Lavrukhin p. 146 abstract

Projection Operator for Angular Momentum Eigenspaces

M. I. Krivoruchenko p. 152 abstract