Contents

JETP Letters

Vol. 121, No. 9, 2025

OPTICS AND LASER PHYSICS

Plateau–Rayleigh Instability as the Seed Process in the Self-Organization of a Photonic Crystal at the Surface of Crystalline Silicon in a Femtosecond Laser Field

S. I. Kudryashov, N. A. Smirnov, N. I. Busleev, P. P. Pakholchuk, M. S. Kovalev, M. A. Tarkhov, G. Kh. Sultanova, and I. V. Krasnogorov p. 671  abstract

Preparation of an Ensemble of Thulium Atoms in Different Vibrational Levels in an Optical Lattice

K. O. Babichev, D. I. Provorchenko, D. A. Mishin, D. O. Tregubov, A. A. Golovizin, and N. N. Kolachevsky p. 677  abstract

Stabilization of Atoms in a High Field as a Method of Generation and Amplification of Coherent Radiation in a Nonequilibrium Laser Plasma

A. V. Bogatskaya, and A. M. Popov p. 685  abstract

OPTICS AND LASER PHYSICS

Smith–Purcell Radiation in Dielectric and the Anomalous Doppler Effect

A. P. Potylitsyn p. 691  abstract

CONDENSED MATTER

Amorphization of Silicon Exposed to Ultrashort Mid-Infrared Laser Pulses

N. I. Busleev, P. P. Pakholchuk, and N. A. Smirnov p. 697  abstract

CONDENSED MATTER

Dependence of the Vibrational Frequencies of a Graphene Sheet on the Ratio of Its Sides and the Number of Vacancy Defects

Z. A. Akhmatov, and Z. A. Akhmatov p. 702  abstract

CONDENSED MATTER

Anomalous Superconductivity and Unusual Normal State Properties of Bilayer and Twisted Graphene (Brief Review)

M. Yu. Kagan, M. M. Korovushkin, V. A. Mitskan, K. I. Kugel, A. L. Rakhmanov, A. V. Rozhkov, and A. O. Sboychakov p. 709  abstract

Digital Control of a Superconducting Adiabatic Sigma Neuron

M. V. Bastrakova, D. S. Pashin, G. I. Gubochkin, A. E. Schegolev, S. V. Bakurskiy, I. I. Soloviev, and N. V. Klenov p. 719  abstract

Spin-Valve Effect for Spin-Polarized Surface States in Topological Semimetals

A. A. Avakyants, V. D. Esin, D. Yu. Kazmin, N. N. Orlova, A. V. Timonina, N. N. Kolesnikov, and E. V. Deviatov p. 727  abstract

CONDENSED MATTER

Magnetic Topological Alloys Based on the Cd3As2 Dirac Semimetal: Doping with Cr, Mn, and Fe

E. T. Kulatov, Yu. A. Uspenskii, and K. I. Kugel p. 735  abstract

METHODS OF PHYSICAL RESEARCH

Inelastic Effects in the Lee–Yang Model

D. Menskoy p. 746  abstract

Diamond of Triads

A. Mironov, A. Morozov, A. Popolitov, and Z. Zakirova p. 752  abstract