Reviews of topical problems

M.M. Glazov, R.A. Suris “Collective states of excitons in semiconductors” Phys. Usp. 63 1051–1071 (2020)

N.L. Bobrov “Spectroscopy of electron—phonon interaction of superconducting point contacts: experimental aspects” Phys. Usp. 63 1072–1091 (2020)

Physics of our days

G.R. Ivanitskii, A.A. Morozov “Subject of study — the aging brain” Phys. Usp. 63 1092–1113 (2020)

Instruments and methods of investigation

E.Z. Gusakov, A.Yu. Popov “Scattering theory of strongly refracting microwaves in turbulent inhomogeneous plasma. Applications of the theory to the description of fluctuation reflectometry in thermonuclear fusion devices” Phys. Usp. 63 1114–1139 (2020)

From the history of physics

V.S. Bystrov, V.M. Fridkin “Two-dimensional ferroelectrics and homogeneous switching. On the 75th anniversary of the Landau—Ginzburg theory of ferroelectricity” Phys. Usp. 63 1140–1147 (2020)

Personalia

V.S. Beskin, M.A. Vasil’ev, A.V. Gaponov-Grekhov, L.M. Zelenyi, K.P. Zybin, Ya.N. Istomin, N.N. Kolachevsky, G.A. Mesyats, L.P. Pitaevskii, M.O. Ptitsyn, V.I. Ritus “Aleksandr Viktorovich Gurevich (on his 90th birthday)” Phys. Usp. 63 1148–1150 (2020)

E.P. Velikhov, A.V. Gaponov-Grekhov, G.G. Denisov, V.V. Zheleznyakov, L.M. Zelenyi, R.I. Ilkaev, G.A. Mesyats, V.A. Rubakov, A.M. Sergeev, V.E. Fortov, E.A. Khazanov, I.A. Shcherbakov “Aleksandr Grigor'evich Litvak (on his 80th birthday)” Phys. Usp. 63 1151–1153 (2020)

Bibliography

E.V. Zakharova “New books on physics and related sciences” Phys. Usp. 63 1154–1156 (2020)

Physics news on the internet

Yu.N. Eroshenko, M.V. Sadovskii “Physics news on the Internet (based on electronic preprints)” Phys. Usp. 63 1157–1159 (2020)