member-academic-staff
Tsofar Maniv

Tsofar Maniv

Professor Emeritus
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Condensed-Matter theory: Dynamic and thermodynamic phenomena in condensed phases, with particular focus on interfaces and two-dimensional and quasi two-dimensional structures of matter.

Recent activity has focused on studying:
(1) The mechanism of extraordinary optical transmission (EOT) through sub-wavelength holes in thin noble metal films (T. W. Ebbesen et al., Nature 391, 667 (1998)), using Electron Energy Loss Spectroscopy (EELS) with highly focuses electron beams.(see Refs.1,3,4 in the selected publications).

 

Electron energy loss spectroscopy (EELS) in a monochromated transmission electron microscope is applied to probe standing-wave-like cavity modes hybridized with surface plasmon polaritons (SPP) in rectangular submicron slits in a thin gold film. Coupling of hybridized SPP-cavity modes between two adjacent slits is studied by systematically varying the width of the metal bar d that separates the two slits. Measurements on two-slit systems with different slit lengths L and fixed width d reveal energy shifts and mode splitting of the fundamental SPP cavity mode which can be generally described as a function of a dimensionless scaling parameter L/d.

 

Fig.1Right panel: Measured EELS intensity along the long slit wall close to the outer (upper panel) inner (lower panel) walls of a two-slit system with L = 960 nm and d = 900 nm. Left panel: Experimental (full symbols) and simulated (empty symbols) energies of the red- and blue-shifted fundamental mode, plotted as a function of L/d. Solid lines were obtained from a simple, two coupled harmonic oscillators model.

 

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Fig.2: Self-consistent superconducting order-parameter amplitude, Δsc (nF) calculated at integer values of nF ∝ 1/H , for parameters characterizing the conducting hole gas created on the surface of Sb2Te3 (blue triangles), and the best fitting curve, based on the GL-like expression (blue dashed line). Also shown is the corresponding semiclassical (HW) result (magenta dashed line) and the self-consistent Landau bandwidth ΔnF (red diamonds). Note the unusual high-field superconducting state appearing well above the GL upper critical field  Hc2 ∝ 1/nc2.

(2) Strong type-II superconductivity, discovered recently on the surface of the topological insulator Sb2Te3 (Lukas Zhao et al, nature communications, DOI: 10.1038/ncomms9279 (2015)), focusing in particular on its very unusual superconducting states under high magnetic fields. (see Ref.5 in the selected publications).

 

 

 

Post Doc: James Franck Institute, University of Chicago, 1977-1978. University of California – Santa Barbara, 1979-1980
PhD:  Hebrew University of Jerusalem, 1977

  1. I. Carmeli, M. A. Itskovsky, Y. Kaufmann, Y. Shaked, S. Richter, T. Maniv, and H. Cohen, “far-and near-field electron beam detection of hybrid cavity-plasmonic modes in gold microholes”, Phys. Rev. B 85, 041405 (R) (2012).
  2. B. Rosenstein, M. Lewkowicz, and T. Maniv, “Chiral anomaly and strength of the electron-electron interaction in Graphene”, Phys. Rev. Lett. 110, 066602 (2013).
  3. R. Walther, S. Fritz, E. Muller, R. Schneider, D. Gerthsen, W. Sigle, T. Maniv, H. Cohen, C. Matyssek, and K. Busch, “Coupling of Surface-Plasmon-Polariton-Hybridized Cavity Modes between Submicron Slits in a Thin Gold Film”, ACS Photonics, 3(5), pp 836–843 (2016).
  4. R. Walther, S. Fritz, E. Muller, R. Schneider, T. Maniv, H. Cohen, C. Matyssek, K. Busch, and D. Gerthsen, “Surface-plasmon-polariton hybridized cavity modes in submicrometer slits in a thin Au film”, Phys. Rev. B 93, 245417 (2016).
  5. V. Zhuravlev, Wenye Duan, and T. Maniv, “Self-consistent Bogoliubov de Gennes theory of the vortex lattice state in a two-dimensional strong type-II superconductor at high magnetic fields”, arXiv:1607.02021v1 [cond-mat.supr-con] 7 Jul 2016, submitted to Phys. Rev. Lett.

Full List of Publications

שם מייל חדר טלפון
Matvey Itskovsky  chr40im@technion.ac.il 418