Tunneling Relaxation Mechanisms of the Jahn–Teller Complexes in a CaF2:Cr2+ Crystal

JETP Letters - The temperature dependences of attenuation and the velocity of ultrasonic waves at frequencies of 26–158 MHz in a CaF2 fluorite crystal at the substitution of...     

Phase Transition in Y3Fe5O12 at High Pressures Observed by Raman Spectroscopy

JETP Letters - The vibrational properties of yttrium iron garnet Y3Fe5O12 at a high quasihydrostatic pressure are studied by the Raman spectroscopy method. Raman spectra are measured in a...     

Nonstandard Features of the Interaction of Single Luminescent Centers Formed by Partial Dislocation Cores in CdTe and ZnSe with Longitudinal Optical Phonons

JETP Letters - Low-temperature (5 K) microphotoluminescence has been measured in order to study individual luminescent centers formed by the cores of partial dislocations in a CdTe/Si film and a...     

Calculation of the Width of the τ → K–K 0 ντ Decay in the Extended Nambu–Jona-Lasinio Model with Estimation of the Contribution from the Final-State Interaction

JETP Letters - The partial width of the $$\tau \to {{K}^{ - }}{{K}^{0}}{{\nu }_{\tau }}$$ decay has been calculated within the extended Nambu–Jona-Lasinio model including the contact and...     

Electronic States of Cobalt Ions in EuBaCo2O5 + δ Layered Cobaltites

JETP Letters - The oxygen K-edge X-ray absorption spectra in EuBaCo2O5.52 ± 0.02 and EuBaCo2O5.24 ± 0.02 cobaltites are measured at temperatures of 300 and 440 K, which are below and...     

Aharonov–Bohm Interferometry Based on Helical Edge States (Brief Review)

JETP Letters - We review recent studies of the spin-dependent tunneling transport via an Aharonov–Bohm interferometer (ABI) formed by helical edge states. We focus on the experimentally...     

Initiation of Explosive Electron Emission and Runaway of Electrons during Pulsed Breakdown of Dense Gases

JETP Letters - A mechanism for the initiation of explosive electron emission at the interface between the cathode and a dense gas is proposed. It is based on the accumulation of positive ions,...     

Quantitative Comparison of LDA + DMFT and ARPES Spectral Functions

JETP Letters - The emergence of angle-resolved photoemission spectroscopy (ARPES) made it possible to observe electronic dispersion directly as a spectral function map. On the other hand, a...     

Optimization of the Magnetron-Injection Gun for a High-Power Planar Millimeter-Wave Gyrotron

Radiophysics and Quantum Electronics - We have developed a method for optimization of a planar magnetron-injection gun (MIG) with allowance for the three-dimensional configuration of the...