Main page of Oleg Braun (Inst. of Physics, Kiev, Ukraine)

Research

• Outline
• Surface science
• Local polaronic model
• Interaction between adsorbed atoms
• Energy exchange on the surface
• Surface diffusion
• The Frenkel-Kontorova model
• Introduction
• Generalizations of the model
• The driven model
• The driven LG (lattice-gas) model
• Tribology
  • Introduction
  • Model
  • Simulation results
  • Onset of sliding
  • Self-ordering of the lubricant
  • Role of lubricant molecule shape
  • Microscopic rolling friction
  • Minimal sliding velocity
  • Earthquake-like model
  • Friction on a mesoscopic scale

Publications (selected;  full list & pdf files)

Book and survey papers

• O.M. Braun, Tribology Letters 39 (2010) 283-293 "Bridging the gap between the atomic-scale and macroscopic modeling of friction"
• O.M. Braun and A.G. Naumovets, Surf. Sci. Reports 60 (2006) 79-158 "Nanotribology: Microscopic mechanisms of friction"
• O.M. Braun and Yu.S. Kivshar, "The Frenkel-Kontorova Model: Concepts, Methods, and Applications" (Springer-Verlag, Berlin, 2004; Russian translation: Fizmatlit, Moscow, 2008) 

Original papers

• O.M. Braun and M. Peyrard, Phys. Rev. E 82 (2010) 036117 "Master equation approach to friction at the mesoscale"
• O.M. Braun and E. Tosatti, Europhys. Lett. 88 (2009) 48003 "Kinetics of stick-slip friction in boundary lubrication"
• O.M. Braun, I. Barel, and M. Urbakh, Phys. Rev. Lett. 103 (2009) 194301 "Dynamics of transition from static to kinetic friction"
• O.M. Braun, N. Manini, and E. Tosatti, Phys. Rev. B 78 (2008) 195402 "Role of lubricant molecular shape in microscopic friction"
• O.M. Braun and E. Tosatti, Phil. Mag. Lett. 88 (2008) 509 "Rack-and-pinion effects in molecular rolling friction"
• O.M. Braun and M. Peyrard, Phys. Rev. Lett. 100 (2008) 125501 "Modeling friction on a mesoscale: Master equation for the earthquakelike model"
• O.M. Braun, Phys. Scr. 78 (2008) 015802 "Phenomenological theory of kinetic friction for the solid lubricant film"
• M. Paliy, O.M. Braun, and S. Consta, Tribology Letters 23 (2006) 7 "The friction properties of an ultrathin confined water film"
• O.M. Braun, M. Peyrard, V. Bortolani, A. Franchini, and A. Vanossi, Phys. Rev. E 72 (2005) 056116 "Transition from smooth sliding to stick-slip motion in a single frictional contact"
• O.M. Braun, Phys. Rev. Lett. 95 (2005) 126104 "Simple model of microscopic rolling friction"
• O.M. Braun, A. Vanossi, and E. Tosatti, Phys. Rev. Lett. 95 (2005) 026102 "Incommensurability of a confined system under shear"
• O.M. Braun and Bambi Hu, Phys. Rev. E 71 (2005) 032103 "Clustering of atoms in a model with multiple thermostats"
• O.M. Braun and Bambi Hu, Phys. Rev. E 71 (2005) 031111 "Two-dimensional two-state lattice-gas model"
• O.M. Braun, M. Paliy, and S. Consta, Phys. Rev. Lett. 92 (2004) 256103 "Ordering of a thin lubricant film due to sliding"
• O.M. Braun and M. Peyrard, Phys. Rev. E 68 (2003) 011506 "Dynamics and melting of a thin confined film"
• O.M. Braun and J. Röder, Phys. Rev. Lett. 88 (2002) 096102 "Transition from stick-slip to smooth sliding: An earthquakelike model"
• O.M. Braun, Phys. Rev. E 63 (2001) 011102 "Role of entropy barriers for diffusion in the periodic potential"
• O.M. Braun, Bambi Hu, and A. Zeltser, Phys. Rev. E 62 (2000) 4235-4245 "Driven kink in the Frenkel-Kontorova model"
• O. Braun, M. Paliy, and Bambi Hu, Phys. Rev. Lett. 83 (1999) 5206-5209 "Fuse safety device on an atomic scale"
• O.M. Braun, A. R. Bishop, and J. Röder, Phys. Rev. Lett. 82 (1999) 3097-3100 "Multistep locked-to-sliding transition in a thin lubricant film"
• Oleg Braun and Bambi Hu, J. Stat. Phys. 92 (1998) 629-649 "Traffic jams in a lattice-gas model"
• O.M. Braun, Yu.S. Kivshar, and M. Peyrard, Phys. Rev. E 56 (1997) 6050-6064 "Kink's internal modes in the Frenkel-Kontorova model"
• O.M. Braun, O.A. Chubykalo, and T.P. Valkering, Phys. Rev. B 53 (1996) 13877-13882 "Structure of kinks for a complex ground state"
• O.M. Braun and Yu.S. Kivshar, Phys. Rev. B 50 (1994) 13388-13400 "Concentration dependence of conductivity and diffusivity in one-dimensional anharmonic lattices"
• O.M. Braun, Surface Sci. 230 (1990) 262-276 "Adiabatic motion of an atomic chain in periodic potential"
• O.M. Braun, Surface Sci. 213 (1989) 336-358 "Energy exchange in adsorbed layers"

Curriculum Vitae ( full version | pdf 0.3 Mb)

Surname: BRAUN      First name: Oleg
       
Address:  Institute of Physics
               National Academy of Sciences of Ukraine
               46 Science Avenue, Kiev 03028 (Ukraine)
               Tel.: (+38044) 525-9891 (office); 530-1850 (home); Fax: 525-1589
               E-mail: obraun.gm@gmail.com

       
Education: Dr.Sci. ("Doctor of Sciences", Solid State Physics, 1991)

Employment: Institute of Physics (Leading Research Fellow)

Specialization: nonlinear physics, surface physics, tribology, computer simulation

Publications: one book and 98 papers in refereed journals
 

Prize: the State Prize of Ukraine (2008)

Teaching courses:

• Computer Modelling in Physics
• Theoretical Aspects of Solid State Physics
• Surface Science

Collaboration

• Yuri S. Kivshar, Australian National University, Canberra (Australia)
• Michel Peyrard and Thierry Dauxois, Laboratoire de Physique, ENS de Lyon (France)
• Erio Tosatti, ICTP & SISSA, Trieste (Italy)
• Alan R. Bishop and Joanna Röder, Theoretical Division, LANL, Los Alamos (USA)
• Nicola Manini, Universita degli Studi di Milano (Italy)

Useful Links

• Software

• VMD  (Visual Molecular Dynamics)

• Image Magick - magician converter of graphic files

• RasTop  (Molecular Visualization Software) by Philippe Valadon

• Translators from L^AT_EX to HTML: T_TH and H^EV^EA

• T_EX to ppt (Power Point) converter: TeX4PPT by Steve Gunn (4.6 Mb)




• Tribology links

• Tribology Letters

• International Tribology Council and Nanotribology Forum

• Nanotribology at ETH, Zürich (DMATL, Surface Science and Technology)

• Friction Lab by Franz-Josef Elmer

 

• Some homepages

  • Bharat Bhushan (Ohio State University, USA)

  • Joost W.M. Frenken (Interface Phys. Group, Leiden University, The Netherlands)

  • B.N.J. Persson (Forschungszentrum Juelich GmbH, IFF Juelich, Germany)

Some Photos & Videos

Last updated on December 1, 2010 by Oleg Braun