Zobrazeno 1 - 10
of 181
pro vyhledávání: '"Rice, W. D."'
In semiconductors, quantum confinement can greatly enhance the interaction between band carriers (electrons and holes) and dopant atoms. One manifestation of this enhancement is the increased stability of exciton magnetic polarons in magnetically-dop
Externí odkaz:
http://arxiv.org/abs/1704.07879
Publikováno v:
J. of Vacuum Science and Technology B 32, 04E102 (2014) (PCSI-41 conference proceeding)
In this work, we study the time- and temperature-dependence of optically induced magnetization in bulk crystals of slightly oxygen-deficient SrTiO$_{3-\delta}$ using an optically coupled SQUID magnetometer. We find that a weak ($\sim$5$\times$10$^{-7
Externí odkaz:
http://arxiv.org/abs/1407.4157
Publikováno v:
Nature Materials 13, 481 (2014)
Strontium titanate (SrTiO$_3$) is a foundational material in the emerging field of complex oxide electronics. While its electronic and optical properties have been studied for decades, SrTiO$_3$ has recently become a renewed materials research focus
Externí odkaz:
http://arxiv.org/abs/1401.1871
Autor:
Rice, W. D., Kono, J., Zybell, S., Winnerl, S., Bhattacharyya, J., Schneider, H., Helm, M., Ewers, B., Chernikov, A., Koch, M., Chatterjee, S., Khitrova, G., Gibbs, H. M., Schneebeli, L., Breddermann, B., Kira, M., Koch, S. W.
Publikováno v:
Physical Review Letters 110, 137404 (2013)
We use terahertz pulses to induce resonant transitions between the eigenstates of optically generated exciton populations in a high-quality semiconductor quantum-well sample. Monitoring the excitonic photoluminescence, we observe transient quenching
Externí odkaz:
http://arxiv.org/abs/1203.3994
Autor:
Rice, W. D., Weber, R. T., Leonard, A. D., Tour, J. M., Nikolaev, P., Arepalli, S., Berka, V., Tsai, A. -L., Kono, J.
Publikováno v:
ACS Nano 6, 2165 (2012)
We have observed a nearly fourfold increase in the electron spin resonance (ESR) signal from an ensemble of single-walled carbon nanotubes (SWCNTs) due to oxygen desorption. By performing temperature-dependent ESR spectroscopy both before and after t
Externí odkaz:
http://arxiv.org/abs/1110.5220
Publikováno v:
Physical Review B 88, 041401(R) (2013)
We have measured temperature ($T$)- and power-dependent electron spin resonance in bulk single-wall carbon nanotubes to determine both the spin-lattice and spin-spin relaxation times, $T_1$ and $T_2$. We observe that $T_1^{-1}$ increases linearly wit
Externí odkaz:
http://arxiv.org/abs/1105.5095
Publikováno v:
Physical Review B 84, 121403(R) (2011)
The appearance of a broad peak at $\sim$1550 cm$^{-1}$ (G$^{-}$ peak) in carbon nanotube resonant Raman scattering spectra has been conventionally attributed to the presence of metallic nanotubes. Here, we present resonant Raman measurements on macro
Externí odkaz:
http://arxiv.org/abs/1101.1331
Autor:
Haroz, E. H., Rice, W. D., Lu, B. Y., Ghosh, S., Hauge, R. H., Weisman, R. B., Doorn, S. K., Kono, J.
Publikováno v:
ACS Nano 4, 1955 (2010)
We have used resonant Raman scattering spectroscopy to fully analyze the relative abundances of different (n,m) species in single-walled carbon nanotube samples that are metallically enriched by density gradient ultracentrifugation. Strikingly, the d
Externí odkaz:
http://arxiv.org/abs/0911.0904
Autor:
Ren, L., Pint, C. L., Booshehri, L. G., Rice, W. D., Wang, X., Hilton, D. J., Takeya, K., Kawayama, I., Tonouchi, M., Hauge, R. H., Kono, J.
Publikováno v:
Nano Letters 9, 2610 (2009)
We describe a film of highly-aligned single-walled carbon nanotubes that acts as an excellent terahertz linear polarizer. There is virtually no attenuation (strong absorption) when the terahertz polarization is perpendicular (parallel) to the nanotub
Externí odkaz:
http://arxiv.org/abs/0903.2583
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