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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Truong KD, Singh MP, Jandl S, Fournier P. Influence of Ni/Mn cation order on the spin-phonon coupling in multifunctional La[sub 2]NiMnO[sub 6] epitaxial films by polarized Raman spectroscopy. Physical Review B. 2009;80:134424.

Singh MP, Truong KD, Jandl S, Fournier P. Stabilization and functional properties of La3 NiAlMnO9 and La3 CoAlMnO9 magnetoelectric triple perovskites. Applied Physics Letters. 2009;94.

Singh MP, Truong KD, Jandl S, Fournier P. Long-range Ni/Mn structural order in epitaxial double perovskite La2 NiMnO6 thin films. Physical Review B. 2009;79.

Li SY, Bonnemaison J-, Payeur A, Fournier P, Wang CH, Chen XH, et al. Reply to comment on {``Low-temperature phonon thermal conductivity of single-crystalline Nd$_2$CuO$_4$: Effects of sample size and surface roughness''}. Physical Review B. 2009;79.

Nechache R, Harnagea C, Carignan L-, Gautreau O, Pintilie L, Singh MP, et al. Epitaxial thin films of the multiferroic double perovskite Bi[sub 2]FeCrO[sub 6] grown on (100)-oriented SrTiO[sub 3] substrates: Growth, characterization, and optimization. Journal of Applied Physics. 2009;105:061621.

Roberge G, Charpentier S, Godin-Proulx S, Rauwel P, Truong KD, Fournier P. Improving the growth of electron-doped Pr2-xCexCuO4+[delta] thin films made by pulsed-laser deposition using excess CuO. Journal of Crystal Growth. 2009;311:1340-5.

Jenkins GS, Schmadel DC, Bach PL, Greene RL, Béchamp-Laganière X, Roberge G, et al. Terahertz magnetotransport measurements in underdoped Pr[sub 2 - x]Ce[sub x]CuO[sub 4] and comparison with angle-resolved photoemission. Physical Review B. 2009;79:224525.

Singh HK, Kumar P, Prasad R, Singh MP, Agarwal V, Siwach PK, et al. Impact of magnetic phase coexistence on magnetotransport in polycrystalline Nd0.51Sr0.49MnO3 thin film. Journal of Physics D: Applied Physics. 2009;42:105009 (6pp). Abstract

Mansouri S, Charpentier S, Jandl S, Fournier P, Mukhin AA, Ivanov YV, et al. A micro-Raman study of a Pr0.5Ca0.5MnO3 single crystal and thin films. Journal of Physics: Condensed Matter. 2009;21:386004 (6pp). Abstract

Iliev MN, Gospodinov MM, Singh MP, Meen J, Truong KD, Fournier P, et al. Growth, magnetic properties, and Raman scattering of La2 NiMnO6 single crystals. Journal of Applied Physics. 2009;106.

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