Question: In what year did a Soviet, Russian, and American theoretical physicist, whose main contributions are in the field of condensed matter physics, come up with his famous theory?

Context articles: Piers Coleman
Lattice model (physics)
George Chapline, Jr.
Keith Brueckner
Sankar Das Sarma
Lev Pitaevskii
Abrikosov vortex
EPS Europhysics Prize
Alex Kamenev
Alexei Alexeyevich Abrikosov

Piers Coleman is a British American theoretical physicist, working in the field of theoretical condensed matter physics.
 Coleman is Professor of Physics at Rutgers University in New Jersey and at Royal Holloway, University of London.
 He is the elder brother of musician and composer Jaz Coleman.
In physics, a lattice model is a physical model that is defined on a lattice, as opposed to the continuum of space or spacetime.
 Lattice models originally occurred in the context of condensed matter physics, where the atoms of a crystal automatically form a lattice.
 Currently, lattice models are quite popular in theoretical physics, for many reasons.
 Some models are exactly solvable, and thus offer insight into physics beyond what can be learned from perturbation theory.
 Lattice models are also ideal for study by the methods of computational physics, as the discretization of any continuum model automatically turns it into a lattice model.
 Examples of lattice models in condensed matter physics include the Ising model, the Potts model, the XY model, the Toda lattice.
 The exact solution to many of these models (when they are solvable) includes the presence of solitons. Techniques for solving these include the inverse scattering transform and the method of Lax pairs, the Yang-Baxter equation and quantum groups.
 The solution of these models has given insights into the nature of phase transitions, magnetization and scaling behaviour, as well as insights into the nature of quantum field theory.
 Physical lattice models frequently occur as an approximation to a continuum theory, either to give an ultraviolet cutoff to the theory to prevent divergences or to perform numerical computations.
 An example of a continuum theory that is widely studied by lattice models is the QCD lattice model, a discretization of quantum chromodynamics.
 However, digital physics considers nature fundamentally discrete at the Planck scale, which imposes , aka Holographic principle.
 More generally, lattice gauge theory and lattice field theory are areas of study.
 Lattice models are also used to simulate the structure and dynamics of polymers.
 Examples include the bond fluctuation model and the 2nd model.
George Frederick Chapline, Jr. (born May 6, 1942) is an American theoretical physicist, based at the Lawrence Livermore National Laboratory.
 His most recent interests have mainly been in quantum information theory, condensed matter, and quantum gravity.
 In 2003 he received the Computing Anticipatory Systems award for a new interpretation of quantum mechanics based on the similarity of quantum mechanics and Helmholtz machines.
 He was awarded the E. O. Lawrence Award in 1982 by the United States Department of Energy for leading the team that first demonstrated a working X-ray laser (see photo).
 In the field of condensed matter physics Chapline is best known as the originator of the concept of a gossamer metal; i.e. a metal where the density of states at the Fermi surface is depressed because of pairing correlations.
 Both the actinides and high T superconductors are examples of gossamer metals.
Keith Allen Brueckner (March 19, 1924 – September 19, 2014) was an American theoretical physicist who made important contributions in several areas of physics, including many-body theory in condensed matter physics, and laser fusion.
 He was born in Minneapolis on March 19, 1924.
 He earned a B.A. and M.A. in mathematics from the University of Minnesota in 1945 and 1947 and a Ph.D. in physics from the University of California, Berkeley, in 1950.
 He died on September 19, 2014 at the age of 90.
Sankar Das Sarma is an India-born American theoretical condensed matter physicist, who has worked in the areas of strongly correlated materials, graphene, semiconductor physics, low-dimensional systems, topological matter, quantum Hall effect, nanoscience, spintronics, Dirac and Weyl materials, collective properties of ultra-cold atomic and molecular systems, optical lattice, many-body theory, and quantum computation.
 His broad research areas are theoretical physics, condensed matter physics, statistical mechanics, and quantum information.
Lev Petrovich Pitaevskii (Russian: Лев Петро́вич Пита́евский ] ) is a Soviet theoretical physicist, who made contributions to the theory of quantum mechanics, electrodynamics, low-temperature physics, plasma physics, and condensed matter physics.
 Together with Evgeny Lifshitz and Vladimir Berestetskii, Lev Pitaevskii has also been the co-author of a few volumes of the influential Landau–Lifschitz "Course of Theoretical Physics" series.
 His academic status is professor.
In superconductivity, an Abrikosov vortex is a vortex of supercurrent in a type-II superconductor theoretically predicted by Alexei Abrikosov in 1957.
 The supercurrent circulates around the normal (i.e. non-superconducting) core of the vortex.
 The core has a size formula_1 — the superconducting coherence length (parameter of a Ginzburg-Landau theory).
 The supercurrents decay on the distance about formula_2 (London penetration depth) from the core.
 Note that in type-II superconductors formula_3.
 The circulating supercurrents induce magnetic fields with the total flux equal to a single flux quantum formula_4.
 Therefore, an Abrikosov vortex is often called a fluxon.
The EPS Europhysics Prize is awarded (currently every 2nd year) since 1975 by the Condensed Matter Division of the European Physical Society, in recognition of recent work (completed in the 5 years preceding the attribution of the award) by one or more individuals, for scientific excellence in the area of condensed matter physics.
 It is one of Europe’s most prestigious prizes in the field of condensed matter physics.
 Several laureates of the EPS Europhysics Prize also received a Nobel Prize in Physics or Chemistry (Geim, Novoselov, Fert, Grünberg, Kroto, Smalley, Ertl, Bednorz, Müller, Binnig, Rohrer, von Klitzing, Alferov).
Alex Kamenev is a theoretical physicist, at the William I Fine Theoretical Physics Institute, University of Minnesota, specializing in condensed matter.
 Kamenev's current research focuses on theoretical condensed matter physics, disordered systems and glasses, field-theoretical treatment of many-body systems, mesoscopic systems, out of equilibrium systems.
 Kamenev earned his M.Sci.
 degree theoretical physics, in 1987 from Moscow State University and a Ph.D. in solid-state physics, in 1996 from Weizmann Institute of Science in Israel.
Alexei Alexeyevich Abrikosov (Russian: Алексе́й Алексе́евич Абрико́сов ; 25 June 1928 – 29 March 2017) was a Soviet, Russian and American theoretical physicist whose main contributions are in the field of condensed matter physics.
 He was awarded the Nobel Prize in Physics in 2003.