Département de physique | Université de Sherbrooke

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Prochains séminaires

lun, 05/27/2013 - 12:30

Susanne Butz, Physikalisches Institut, Karlsruhe Institute of Technology, Karlsruhe, Germany.
- 12:30
- D3-2040
- Title: A Tunable Josephson Metamaterial
  
  Abstract: We present experimental data on a tunable magnetic metamaterial consisting of rf-SQUIDs. A metamaterial is a medium constructed of artifical elements, so- called meta-atoms, that interact in a specific way with an incoming electromagnetic wave. The size of and the distance between the individual meta-atoms is much smaller than the wavelength. Our metamaterial consists of one-dimensional arrays of 27 rf-SQUIDs, one chain placed inside each of the gaps of a coplanar waveguide. Due to the nonlinear inductance of the rf-SQUID, its resonance frequency is tunable in situ by applying a dc magnetic field. We demonstrate that this results in tunable effective parameters of our metamaterial. In order to obtain the effective magnetic permeability from the measured data, we employ a technique that uses only the complex transmission coefficient S21.
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lun, 06/03/2013 - 12:30

Bhaskar Roy Bardhan, Department of Physics and Astronomy, Louisiana State University
- 12:30
- D3-2040
- To be annonced
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mer, 06/05/2013 - 10:45

INTRIQ : Lilian Childress, McGill
- 10:45
- D1-2165
- Title: Spins and photons: toward quantum networks in diamond
  
  Abstract: Long-lived electronic and nuclear spin states have made nitrogen-vacancy (NV) defects in diamond a leading candidate for solid-state quantum information processing. Moreover, their coherent optical transitions open opportunities for quantum communication. This talk will consider the motivation and requirements for optically-networked quantum devices, and explore challenges and opportunities for realizing them in diamond. In particular, the resonant excitation and emission in these defect centers enables single shot spin detection as well as observation of two-photon quantum interference; these two capabilities have enabled measurement-based entanglement between remote NV centers.
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lun, 06/10/2013 - 12:30

Frank Verstraete , Université de Vienne
- 12:30
- D3-2040
- To be announced
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mar, 06/11/2013 - 00:00

Wolfgang Belzig, l'Université de Constance, Allemagne
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Roberge B, Jandl S, Nugroho AA, Palstra TT. Micro-Raman study of orbiton-phonon coupling in YbVO 3. Journal of Raman Spectroscopy. 2012;43:127-30.

Vermette J, Jandl S, Orlita M, Gospodinov MM. Role of the apical oxygen in the low-temperature magnetoelectric effect in RMnO 3 (R=Ho and Lu). Physical Review B - Condensed Matter and Materials Physics. 2012;85.

Laverdière J, Jandl S, Fournier P. Colossal magnetoresistance of {$\rm Nd_{2/3}Sr_{1/3}MnO_3$} ultrathin films grown on charge-ordered {$\rm Nd_{1/2}Ca_{1/2}MnO_3$} manganite. Physical Review B - Condensed Matter and Materials Physics. 2011;84.

Truong KD, Singh MP, Jandl S, Fournier P. Investigation of phonon behavior in Pr 2 NiMnO 6 by micro-Raman spectroscopy. Journal of Physics: Condensed Matter. 2011;23:052202. Abstract

Singh MP, Truong KD, Jandl S, Fournier P. Magnetic properties and phonon behavior of epitaxial Pr2NiMnO6 thin films. Applied Physics Letters. 2011;98.

Laverdière J, Jandl S, Fournier P. Low field colossal magnetoresistance in ultra thin Nd2/3Sr1/3MnO3 film grown on charge ordered Nd1/2Ca1/2MnO3 manganite. Physical Review B. 2011;84.

Jandl S, Mansouri S, Mukhin AA, Yu Ivanov V, Balbashov A, Gospodino MM, et al. Study of crystal-field excitations and Raman active phonons in o-DyMnO 3. Journal of Magnetism and Magnetic Materials. 2011;323:1104-8.

Singh MP, Truong KD, Jandl S, Fournier P. Magnetic properties and phonon behavior of Pr[sub 2]NiMnO[sub 6] thin films. Applied Physics Letters. 2011;98(16).

Singh MP, Truong KD, Jandl S, Fournier P. Phase formation, phonon behavior, and magnetic properties of novel ferromagnetic La[sub 3]BAlMnO[sub 9] (B = Co or Ni) triple perovskites. Journal of Applied Physics. 2010;107:09D916.

Singh MP, Truong KD, Jandl S, Fournier P. Multiferroic double perovskites: Opportunities, issues, and challenges. Journal of Applied Physics. 2010;107:09D917.

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