Reviews of topical problems

Z.D. Kvon, D.A. Kozlov, E.B. Olshanetsky, G.M. Gusev, N.N. Mikhailov, S.A. Dvoretsky “Topological insulators based on HgTe” Phys. Usp. 63 629–647 (2020)

E.D. Eidelman, A.V. Arkhipov “Field emission from carbon nanostructures: models and experiment” Phys. Usp. 63 648–667 (2020)

Yu.I. Ustinovshchikov “Pairwise interatomic interaction in alloys” Phys. Usp. 63 668–682 (2020)

O.G. Onishchenko, O.A. Pokhotelov, N.M. Astaf’eva, W. Horton, V.N. Fedun “Structure and dynamics of concentrated mesoscale vortices in planetary atmospheres” Phys. Usp. 63 683–697 (2020)

Physics of our days

A.M. Zheltikov, M.O. Scully “Photon entanglement for life-science imaging: rethinking the limits of the possible” Phys. Usp. 63 698–707 (2020)

Instruments and methods of investigation

V.L. Vaks, V.A. Anfertev, V.Yu. Balakirev, S.A. Basov, E.G. Domracheva, A.V. Illyuk, P.V. Kupriyanov, S.I. Pripolzin, M.B. Chernyaeva “High resolution terahertz spectroscopy for analytical applications” Phys. Usp. 63 708–720 (2020)

Methodological notes

S.V. Petrov “Was Sommerfeld wrong? (To the history of the appearance of spin in relativistic wave equations)” Phys. Usp. 63 721–724 (2020)

Personalia

L.A. Bol’shov, E.P. Velikhov, V.I. Il’gisonis, A.N. Lagar’kov, V.B. Mintsev, A.P. Napartovich, G.E. Norman, O.F. Petrov, V.P. Smirnov, E.E. Son, V.E. Fortov, V.E. Cherkovets “In memory of Andrei Nikonovich Starostin” Phys. Usp. 63 725–727 (2020)

E.B. Aleksandrov, A.M. Bykov, A.G. Zabrodskii, A.V. Ivanchik, A.D. Kaminker, A.A. Kaplyanskii, S.A. Levshakov, N.N. Rozanov, R.A. Suris, R.A. Sunyaev, V.K. Khersonsky, D.G. Yakovlev “In memory of Dmitrii Aleksandrovich Varshalovich” Phys. Usp. 63 728–729 (2020)

Physics news on the internet

Yu.N. Eroshenko “Physics news on the Internet (based on electronic preprints)” Phys. Usp. 63 730–731 (2020)