Reviews of topical problems

Yu.V. Gulyaev, A.S. Bugaev, V.M. Rozenbaum, L.I. Trakhtenberg “Nanotransport controlled by means of the ratchet effect” Phys. Usp. 63 311–326 (2020)

D.S. Sanditov “Nature of Poisson's ratio of amorphous polymers and glasses and its relation to structure-sensitive properties” Phys. Usp. 63 327–341 (2020)

A.I. Gusev “High-energy ball milling of nonstoichiometric compounds” Phys. Usp. 63 342–364 (2020)

Instruments and methods of investigation

E.Z. Gusakov, A.Yu. Popov “Low-power-threshold parametric decay instabilities of powerful microwave beams in toroidal fusion devices” Phys. Usp. 63 365–387 (2020)

S.I. Moshkunov, V.Yu. Khomich “Method of detection and spectrometry of charged particles produced in a superstrong electromagnetic field based on their transport by the magnetic field of a coaxial line” Phys. Usp. 63 388–394 (2020)

Methodological notes

I.F. Ginzburg “Particles in finite and infinite one-dimensional chains” Phys. Usp. 63 395–406 (2020)

B.I. Sturman “Ballistic and shift currents in the bulk photovoltaic effect theory” Phys. Usp. 63 407–411 (2020)

Personalia

L.N. Bogdanova, S.I. Vinitskii, S.S. Gershtein, D.L. Demin, D.I. Kazakov, V.I. Korobov, V.A. Matveev, V.S. Melezhik, Yu.T. Oganessian, V.A. Rubakov, A.A. Yukhimchuk, M.P. Faifman “In memory of Leonid Ivanovich Ponomarev” Phys. Usp. 63 412–413 (2020)

Physics news on the internet

Yu.N. Eroshenko “Physics news on the Internet (based on electronic preprints)” Phys. Usp. 63 414–415 (2020)