Zobrazeno 1 - 10
of 266
pro vyhledávání: '"Campman, K."'
Autor:
Leonard, J. R., Hu, Lunhui, High, A. A., Hammack, A. T., Wu, Congjun, Butov, L. V., Campman, K. L., Gossard, A. C.
Phase singularities in quantum states play a significant role both in the state properties and in the transition between the states. For instance, a transition to two-dimensional superfluid state is governed by pairing of vortices and, in turn, unpai
Externí odkaz:
http://arxiv.org/abs/1910.06387
Autor:
Leonard, J. R., High, A. A., Hammack, A. T., Fogler, M. M., Butov, L. V., Campman, K. L., Gossard, A. C.
Publikováno v:
Nature Communications 9, 2158 (2018)
We report on the observation of the Pancharatnam-Berry phase in a condensate of indirect excitons (IXs) in a GaAs coupled quantum well structure. The Pancharatnam-Berry phase leads to phase shifts of interference fringes in IX interference patterns.
Externí odkaz:
http://arxiv.org/abs/1709.00533
Autor:
Dorow, C. J., Hasling, M. W., Calman, E. V., Butov, L. V., Wilkes, J., Campman, K. L., Gossard, A. C.
Publikováno v:
Phys. Rev. B 95, 235308 (2017)
We present the direct measurements of magnetoexciton transport. Excitons give the opportunity to realize the high magnetic field regime for composite bosons with magnetic fields of a few Tesla. Long lifetimes of indirect excitons allow the study kine
Externí odkaz:
http://arxiv.org/abs/1705.09077
Autor:
Kuznetsova, Y. Y., Dorow, C. J., Calman, E. V., Butov, L. V., Wilkes, J., Campman, K. L., Gossard, A. C.
Publikováno v:
Phys. Rev. B 95, 125304 (2017)
We present spatially- and spectrally-resolved photoluminescence measurements of indirect excitons in high magnetic fields. Long indirect exciton lifetimes give the opportunity to measure magnetoexciton transport by optical imaging. Indirect excitons
Externí odkaz:
http://arxiv.org/abs/1610.03116
Publikováno v:
Phys. Rev. B 91, 245302 (2015)
At low temperatures, indirect excitons formed at the in-plane electron-hole interface in a coupled quantum well structure undergo a spontaneous transition into a spatially modulated state. We report on the control of the instability wavelength, measu
Externí odkaz:
http://arxiv.org/abs/1502.02101
Autor:
Andreakou, P., Cronenberger, S., Scalbert, D., Nalitov, A., Gippius, N. A., Kavokin, A. V., Nawrocki, M., Leonard, J. R., Butov, L. V., Campman, K. L., Gossard, A. C., Vladimirova, M.
Publikováno v:
Phys. Rev. B 91, 125437 (2015)
Indirect excitons in coupled quantum wells are long-living quasi-particles, explored in the studies of collective quantum states. We demonstrate, that despite the extremely low oscillator strength, their spin and population dynamics can by addressed
Externí odkaz:
http://arxiv.org/abs/1407.5500
Autor:
Remeika, M., Hammack, A. T., Poltavtsev, S., Butov, L. V., Wilkes, J., Ivanov, A. L., Campman, K. L., Hanson, M., Gossard, A. C.
Publikováno v:
Phys. Rev. B 88, 125307 (2013)
We report on the spatially separated pump-probe study of indirect excitons in the inner ring in the exciton emission pattern. A pump laser beam generates the inner ring and a weaker probe laser beam is positioned in the inner ring. The probe beam is
Externí odkaz:
http://arxiv.org/abs/1304.5246
Autor:
High, A. A., Hammack, A. T., Leonard, J. R., Yang, Sen, Butov, L. V., Ostatnicky, T., Vladimirova, M., Kavokin, A. V., Liew, T. C. H., Campman, K. L., Gossard, A. C.
Publikováno v:
Phys. Rev. Lett. 110, 246403 (2013)
Spin currents and spin textures are observed in a coherent gas of indirect excitons. Applied magnetic fields bend the spin current trajectories and transform patterns of linear polarization from helical to spiral and patterns of circular polarization
Externí odkaz:
http://arxiv.org/abs/1302.3852
Autor:
Kuznetsova, Y. Y., Leonard, J. R., Butov, L. V., Wilkes, J., Muljarov, E. A., Campman, K. L., Gossard, A. C.
Publikováno v:
Phys. Rev. B 85, 165452 (2012)
We report on the excitation energy dependence of the inner ring in the exciton emission pattern. The contrast of the inner ring is found to decrease with lowering excitation energy. Excitation by light tuned to the direct exciton resonance is found t
Externí odkaz:
http://arxiv.org/abs/1202.3096
Autor:
Dolgopolov, V. T., Deviatov, E. V., Khrapai, V. S., Reuter, D., Wieck, A. D., Wixforth, A., Campman, K. L., Gossard, A. C.
Publikováno v:
Phys. Stat. Sol. (b) 243, No. 14, 3648 - 3652 (2006)
We investigate the ground state competition at the transition from the spin unpolarized to spin ordered phase at filling factor $\nu=2/3$ in single layer heterostructure and at $\nu=2$ in double layer quantum well. To trace the quantum Hall phase we
Externí odkaz:
http://arxiv.org/abs/cond-mat/0606716