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| Alexei Kosevich | |
|---|---|
| Name | Alexei Kosevich |
| Birth date | 1948 |
| Birth place | Soviet Union |
| Fields | Physics, Condensed matter physics, Nonlinear dynamics |
| Workplaces | Moscow State University, Kapitza Institute for Physical Problems, Tulane University |
| Alma mater | Moscow State University |
| Known for | "theory of nonlinear lattice dynamics, solitons, dislocations, phonon transport" |
Alexei Kosevich is a physicist noted for theoretical work in condensed matter physics, nonlinear lattice dynamics, and the theory of defects in crystalline solids. His research has connected mathematical methods from soliton theory, integrable systems, and statistical mechanics to problems in materials such as metals, semiconductors, and ionic crystals. He has held positions at prominent institutions in the Soviet Union, Russia, and the United States, contributing to both foundational theory and interpretations relevant to experimental studies in neutron scattering, Raman spectroscopy, and thermal transport.
Born in the late 1940s in the Soviet Union, Kosevich completed his undergraduate and graduate studies at Moscow State University where he trained under advisors affiliated with the Landau Institute for Theoretical Physics and the Kapitza Institute for Physical Problems. During his formative years he was exposed to research traditions represented by figures such as Lev Landau, Igor Tamm, Pyotr Kapitza, Evgeny Lifshitz, and Isaak Khalatnikov. His doctoral work combined methods from quantum mechanics, solid state physics, and nonlinear dynamics, reflecting contemporaneous developments associated with researchers at Steklov Institute of Mathematics, Institute of Physics, and the broader Soviet theoretical community.
Kosevich's early appointments included positions at Moscow State University and the Kapitza Institute for Physical Problems, where he collaborated with scholars from the Soviet Academy of Sciences and engaged with international visitors from institutions such as Cambridge University, Princeton University, Massachusetts Institute of Technology, and CNRS. Later he held visiting professorships and research fellowships at universities in Europe and the United States, including Tulane University, where he continued work on lattice dynamics alongside colleagues from Rutgers University, University of California, and Harvard University. His teaching and supervision connected him to graduate programs associated with Moscow Institute of Physics and Technology and doctoral students who later worked at places like Bell Labs, Argonne National Laboratory, and Los Alamos National Laboratory.
Kosevich developed influential theoretical frameworks for the dynamics of topological defects such as dislocations, domain walls, and vortices in crystalline and quasi-one-dimensional systems. He applied concepts from soliton theory—notably techniques influenced by Ablowitz–Kaup–Newell–Segur formalism and the work of Zabusky and Kruskal—to analyze energy transport and scattering in nonlinear lattices, relating to experiments performed with neutron scattering and inelastic light scattering. His models of phonon-defect interactions drew on methods used by Pippard and Klemens to address phonon lifetimes and thermal conductivity in materials such as graphene, silicon, and ionic crystals including NaCl and CsCl.
Kosevich made seminal contributions to the theory of discrete breathers and intrinsic localized modes by connecting the concept to earlier work on anharmonic lattices by Frenkel and Kontorova, and to nonlinear excitations studied by Toda and Fermi–Pasta–Ulam–Tsingou. His analyses of kink and soliton motion in the presence of impurities and external driving elucidated mechanisms of radiative damping and pinning that have bearings on phenomena investigated by groups at Stanford University, ETH Zurich, and Max Planck Institute for the Physics of Complex Systems. He also advanced theoretical descriptions of ultrasonic attenuation and acoustic solitons relevant to research at Los Alamos National Laboratory and Rutherford Appleton Laboratory.
Interdisciplinary links in his work bridged to materials science problems such as plastic deformation studies associated with dislocation dynamics in metals and the thermomechanical behavior of thin films and nanostructures. Collaborations and citations connected him to the literature around Anderson localization, Peierls–Nabarro potential, and transport theories developed by Kubo and Boltzmann approaches adapted for nonlinear lattices.
Kosevich received recognition from national and international bodies within the Soviet Academy of Sciences and later Russian scientific organizations; his awards reflect contributions acknowledged alongside contemporaries from institutions including Royal Society, National Academy of Sciences (United States), and European academies. He has been invited to give plenary lectures at conferences organized by International Union of Crystallography, American Physical Society, European Physical Society, and symposia honoring work by Lev Landau and Pyotr Kapitza. Fellowships and visiting appointments at centers such as the Institute for Advanced Study and CERN further attest to the impact of his scholarship.
- A. Kosevich, "The Crystal Lattice: Phonons, Solitons, Dislocations" (monograph), often cited alongside works by Landau and Lifshitz in treatments of lattice excitations. - A. Kosevich, articles on nonlinear lattice dynamics published in journals associated with American Physical Society, Elsevier, and Springer proceedings of symposia including Solvay Conference-style meetings. - Papers on defect-phonon interactions and thermal transport coauthored with researchers affiliated with Oxford University, University of Cambridge, and Massachusetts Institute of Technology, appearing in leading periodicals such as Physical Review Letters and Physical Review B.
Category:Physicists Category:Condensed matter physicists Category:Soviet physicists Category:Russian physicists