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Chirality Dependence of the $K$-Momentum Dark Excitons in Carbon Nanotubes

Autor: Vora, P. M., Tu, X., Mele, E. J., Zheng, M., Kikkawa, J. M.

Publikováno v: Phys. Rev. B 81 155123 (2010)

Using a collection of twelve semiconducting carbon nanotube samples, each highly enriched in a single chirality, we study the chirality dependence of the $K$-momentum dark singlet exciton using phonon sideband optical spectroscopy. Measurements of br

Externí odkaz: http://arxiv.org/abs/0908.1399

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Dynamic Kerr Effect and Spectral Weight Transfer in the Manganites

Autor: McGill, S. A., Miller, R. I., Torrens, O. N., Mamchik, A., Chen, I-Wei, Kikkawa, J. M.

We perform pump-probe Kerr spectroscopy in the colossally magnetoresistive manganite Pr0.67Ca0.33MnO3. Kerr effects uncover surface magnetic dynamics undetected by established methods based on reflectivity and optical spectral weight transfer. Our fi

Externí odkaz: http://arxiv.org/abs/cond-mat/0311452

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Optical manipulation of nuclear spin by a two-dimensional electron gas

Autor: Salis, G., Fuchs, D. T., Kikkawa, J. M., Awschalom, D. D., Ohno, Y., Ohno, H.

Publikováno v: Physical Review Letters 86, 2677 (2001)

Conduction electrons are used to optically polarize, detect and manipulate nuclear spin in a (110) GaAs quantum well. Using optical Larmor magnetometry, we find that nuclear spin can be polarized along or against the applied magnetic field, depending

Externí odkaz: http://arxiv.org/abs/cond-mat/0010139

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