ELECTRONIC TORSIONAL SOUND IN LINEAR ATOMIC CHAINS: ENERGY TRANSPORT AT 1000 KM S

by Arkady Kurnosov

at Condensed Matter Seminar

Mon, 11 Jan 2016, 11:30
Physics building (#54) room 207

Abstract

We proposed a new class of entirely electronic vibrational propagating waves with high speed and energy of the quantum These waves are associated with the torsional oscillations of electronic density and they exist in linear shaped atomic structures including cumulene and transition metals In particular we investigate electronic vibrational modes in a linear carbon allotrope cumulene a compound containing a chain of carbon atoms with double bonds between them While carbon nuclei are posed along the primary axis so they can participate in transverse and longitudinal motion only the interatomic electronic clouds behave as a torsion spring with remarkable torsional stiffness The collective dynamics of these clouds can be described in terms of electronic vibrational quanta which we name torsitons It is shown that the group velocity of these quanta can reach 1000 km s which is much higher than the typical speed of sound because of the small mass of participating electrons compared to the atomic mass For the same reason maximum energy of torsitons can be as high as a few electron Volts while the minimum possible energy is evaluated as a few hundreds inverse cm and this minimum is associated with the asymmetry of zero point atomic vibrations Such ultra fast propagating waves can be used for efficient energy transport to the long distances and chemical reaction control

Created on 30-12-2015 by Bar Lev, Yevgeny (ybarlev)
Updaded on 30-12-2015 by Bar Lev, Yevgeny (ybarlev)