Prof. Lifshitz Ron

  
Affiliation:School of Physics and Astronomy
Shenkar-Physics building
room 421
Tel:  (972)-3-6405145
 
Fax: (972)-3-6406953
 
Email: ronlif@tau.ac.il
 
Personal Website:

 
Postal Address:School of Physics and Astronomy
Tel Aviv University
Tel Aviv 69978

Research Interest

Nanomechanics & Quasicrystals
With recent advances in nanotechnology, state of the art nanoelectromechanical systems (NEMS) can now be fabricated with lateral dimensions down to a few nanometers and combined with self-assembled nanostructures such as carbon nanotubes, achieving normal frequencies that exceed 1 GHz. As a consequence, NEMS are no longer simply smaller and improved versions of MEMS (microelectromechanical systems), but also offer great opportunities for the study of mechanics in physical regimes that previously had been inaccessible experimentally. The Lifshitz group—working in contact with the groups of Michael Roukes and Michael Cross at Caltech, the groups of Jan von Delft and Eva Weig at LMU-Munich, and the group of Eyal Buks at the Technion—is concerned with the theoretical study of nanomechanical systems. These studies cover a broad range of topics, ranging from the mesoscopic physics of phonons and their interaction with electrons, the classical nonlinear dynamics of coupled nanomechanical systems, and the quantum behavior of human-made nano-scale devices.

The Lifshitz group is also involved in unrelated theoretical research in the field of quasicrystals. These crystals—which are not periodic but nevertheless possess perfect long-range order—offer interesting opportunities for studies at the nano-scale. Lifshitz is collaborating with Haim Diamant of the School of Chemistry at TAU in studies of self-assembly of nano-scale molecules into soft quasicrystalline states; In a collaboration with the group of Ady Arie of the Faculty of Engineering at TAU, Lifshitz is studying artificially fabricated nonlinear photonic quasicrystals for the purpose of optical frequency conversion; and in a collaboration with the group of Clemens Bechinger at the University of Stuttgart, Lifshitz is studying the dynamics of optically-induced colloidal quasicrystals, used as model system to understand atomic dynamics on surfaces of solid-state quasicrystals.

Selected Publications


  • R. Lifshitz and M.C. Cross, “Nonlinear dynamics of nanomechanical resonators.'' In Nonlinear Dynamics of Nanosystems, Eds. G. Radons, B. Rumpf, and H.G. Schuster (Wiley-VCH, Weinheim, 2010) Ch. 8.
  • E. Kenig, B.A. Malomed, M.C. Cross, and R. Lifshitz, “Intrinsic localized modes in parametrically-driven arrays of nonlinear resonators',' Phys. Rev. E 80 (2009) 046202.
  • K. Barkan, H. Diamant, and R. Lifshitz, “Stability of quasicrystals composed of soft isotropic particles,” Phys. Rev. B 83 (2011) 172201.
  • B. Freedman, G. Bartal, M. Segev, R. Lifshitz, D.N. Christodoulides, and J.W. Fleischer. "Observation of wave and defect dynamics in nonlinear photonic quasicrystals," Nature 440 (2006) 1166.
  • Y. Bromberg, M.C. Cross, and R. Lifshitz, "Response of discrete nonlinear systems with many degrees of freedom," Phys. Rev. E 73 (2006) 016214.
  • R. Lifshitz, A. Arie, and A. Bahabad, “Photonic quasicrystals for nonlinear optical frequency conversion,” Phys. Rev. Lett. 95 (2005) 133901.
  • M.C. Cross, A. Zumdieck, R. Lifshitz, and J.L. Rogers, “Synchronization by nonlinear frequency pulling,” Phys. Rev. Lett. 93 (2004) 224101.
  • M.C. Cross and R. Lifshitz, “Elastic wave transmission at an abrupt junction in a thin plate with application to heat transport and vibrations in mesoscopic systems,” Phys. Rev. B 64 (2001) 085324.
  • R. Lifshitz and M.L. Roukes, “Thermoelastic damping in micro- and nanomechanical systems,” Phys. Rev. B 61 (2000) 5600-5609.