Overview of the research of nanosystems at BLTP

Theory of Condensed Matter and New Materials Leaders: V. A Theory of Condensed Matter and New Materials Leaders:  V.A. Osipov and J. Brankov Project: Physical properties of complex materials and nanostructures Sector N16: Nanostructures and nanoscale phenomena

Main topics: carbon nanosystems atomic clusters quantum dots layered structures electron and spin transport fractal systems

Carbon nanosystems

Electronic structure Carbon nanocones

The model Dirac equation on a curved manifold Two sorts of spinors geometry gauge fields

Electronic structure Carbon nanotubes (closed) metallic semiconducting Far from the cap (top), near (middle), in the cap (bottom)

Electronic structure Spherical and spheroidal fullerenes B Zeeman splitting The first electronic level The second electronic level

Electronic structure two-walled nanotubes and fullerenes This poster has been presented on summer’s PAC meeting in 2009

graphite carbon nanotubes few-layer graphene Field emission graphite carbon nanotubes few-layer graphene

EFFECT OF BAND STRUCTURE ON FIELD EMISSION Katkov V.L., Osipov V.A.: J. Phys.: Cond. Matt. 20 (2008) 035204 GRAPHITE NANOTUBES 2D 3D Both cases were reduced to 1D problem. Field emission law for graphite in two orientations. Analytical expressions explain numerical calculations.

V.L. Katkov and V.A. Osipov, JETP Letters 90, p. 304 (2009) Energy distribution of field emitted electrons from carbon nanosheets: manifestation of the quantum size effect number of layers N Quantum Size Effect quantity of emitted electrons vs energy of emitted electrons P(E) (can be experimentally measured) QSE FEED FLG V.L. Katkov and V.A. Osipov, JETP Letters 90, p. 304 (2009)

Applications Samsung demonstrates world’s first carbon-nanotube based display (2008) Researchers at Stanford University, Cornell University and Purdue University in the US have produced a carbon nanotube transistor that has better properties than silicon transistors of an equivalent size. The device uses zirconium oxide rather than silicon dioxide, which has a lower dielectric constant, as the gate insulator (2006). Engineers from Stanford University presented a chip made of carbon nanotubes (2009).

The first JINR prize in theoretical physics, 2007 Collaboration V. Osipov, E. Kochetov, D. Kolesnikov, V. Katkov (JINR); M. Pudlak, R. Pincak (Slovakia) The first JINR prize in theoretical physics, 2007

metal clusters: orbital magnetic modes Scissors mode Twist mode V.O. Nesterenko, W. Kleinig, F.F. de Souza Cruz and N. Lo Iudice, “Orbital magnetic dipole mode in deformed clusters: a fully microscopical analysis”, Phys. Rev. Lett. , 83, 57 (1999) Twist mode V.O. Nesterenko, J.R. Marinelli, F.F. de Souza Cruz, W. Kleinig and P.-G. Reinhard, “Twist model in spherical Alkali Metal Clusters”, Phys. Rev. Lett. , 85, 3141 (2000) - Universal collective modes (nuclei, atomic clusters, quantum dots, BEC, …) - SM and TM in clusters: oscillations of valence electrons against ions V.O. Nesterenko, "Metal clusters as a new application field of nuclear-physics ideas and methods", Sov. J. Part. Nucl., 23 726 (1992) first review on metal clusters 15

Pump-probe two-photon spectroscopy of metal clusters jellium TDLDA Endurant quadrupole oscillations result in PES satellites: Photoelectron spectrum (PES) Measuring 1eh energy and lifetime V.O. Nesterenko et al, JPB, 39 3905 (2006) V.O. Nesterenko et al, PRA, 73, 021201(R) (2006) V.O. Nesterenko, P.-G. Reinhard, W. Kleinig, in book "Atomic and Molecular Cluster Research", Nova Science Publisher, NY, 2006 16

of individual atoms and Bose-Einstein condensates Complete irreversible adiabatic transport of individual atoms and Bose-Einstein condensates in multi-well traps Adiabatic methods 2-level system 2-well system |1> |2> pump - Analogy between multi-well and multi-level systems - Adiabatic population transfer schemes from quantum optics (STIRAP, Landau-Zener, Rosen-Zener) - Development of effective transport protocols which work even under strong nonlinearity (!!!) caused by interaction between the atoms - Universality (attractive/repulsive interaction, left-right transport) V.O. Nesterenko, A.N. Novikov, F.F. de Souza Cruz, and E.L. Lapolli, Laser Phys. 19, 616-624 (2009). V.O. Nesterenko, A.N. Novikov, A.Yu. Cherny, F.F. Souza Cruz, and E. Suraud, JPB 42, 235303(2009). V.O. Nesterenko, A.N. Novikov, and E. Suraud, Laser Phys. 20, 1149 (2010). 17

Magnetic Field and Symmetry Effects in Small Quantum Dots R. G. Nazmitdinov, Physics of Particles and Nuclei, 2009, Vol. 40, No. 1, pp. 71–92. The magnetic dependence of the additional energy Δμ in two-electron QDs. The solid grey lines display the experimental spacing ΔVg as a function of B.

Layered structures (Bi2Sr2CanCun+1O2n+6-d) The oral talk on PAC meeting

Fractal systems The oral talk will be presented tomorrow by Dr Anitas

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