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Optical Gain from InAs Nanocrystal Quantum Dots in a Polymer Matrix

Autor: Chen, Gang, Rapaport, Ronen, Fuchs, Dan, Vilan, Sahar, Aharoni, Assaf, Banin, Uri

We report on the first observation of optical gain from InAs nanocrystal quantum dots emitting at 1.55 microns based on a three-beam, time resolved pump-probe technique. The nanocrystals were embedded into a transparent polymer matrix platform suitab

Externí odkaz: http://arxiv.org/abs/cond-mat/0504184

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Transport properties of BSCCO crystals with and without surface barriers

Autor: Fuchs, Dan T., Doyle, Richard A., Zeldov, Eli, Rycroft, Steve F. W. R., Tamegai, Tsuyoshi, Ooi, Shuuichi, Rappaport, Michael L., Myasoedov, Youri

Large BSCCO crystals with electrical contacts positioned far from the edges are studied by transport measurements, then cut into the common narrow strip geometry, and remeasured. Instead of showing larger resistance, the narrow strip samples display

Externí odkaz: http://arxiv.org/abs/cond-mat/9807016

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Possible new vortex matter phases in BSCCO

Autor: Fuchs, Dan T., Zeldov, Eli, Tamegai, Tsuyoshi, Ooi, Shuuichi, Rappaport, Michael, Shtrikman, Hadas

Publikováno v: PRL, Volume 80, page 4971, (1998).

The vortex matter phase diagram of BSCCO crystals is analyzed by investigating vortex penetration through the surface barrier in the presence of a transport current. The strength of the effective surface barrier, its nonlinearity, and asymmetry are u

Externí odkaz: http://arxiv.org/abs/cond-mat/9804205

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Where does the transport current flow in Bi2Sr2CaCu2O8 crystals?

Autor: Fuchs, Dan T., Zeldov, Eli, Rappaport, Michael, Tamegai, Tsuyoshi, Ooi, Shuuichi, Shtrikman, Hadas

Publikováno v: Nature, Volume 391, page 373, (1998).

A new measurement technique for investigation of vortex dynamics is introduced. The distribution of the transport current across a crystal is derived by a sensitive measurement of the self-induced magnetic field of the transport current. We are able

Externí odkaz: http://arxiv.org/abs/cond-mat/9711284

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