Artículos de revistas
Temperature-induced Spin-coherence Dissipation In Quantum Dots
Registro en:
Physical Review B - Condensed Matter And Materials Physics. , v. 78, n. 4, p. - , 2008.
10980121
10.1103/PhysRevB.78.041303
2-s2.0-47349101323
Autor
Hernandez F.G.G.
Greilich A.
Brito F.
Wiemann M.
Yakovlev D.R.
Reuter D.
Wieck A.D.
Bayer M.
Institución
Resumen
The temperature dependence of electron-spin coherence in singly negatively charged (In,Ga)As/GaAs quantum dots is studied by time-resolved Faraday rotation. The decoherence time T2 is constant on the microsecond scale for temperatures below 15 K; for higher temperatures it shows a surprisingly sharp drop into the nanosecond range. The decrease cannot be explained through inelastic scattering with phonons, and it may be related to elastic scattering due to phonon-mediated fluctuations of the hyperfine interaction. © 2008 The American Physical Society. 78 4
Nielsen, M.A., Chuang, I.L., (2000) Quantum Computation and Quantum Information, , Cambridge University Press, United Kingdom Hanson, R., (2007) Rev. Mod. Phys., 79, p. 1217. , RMPHAT 0034-6861 10.1103/RevModPhys.79.1217 Loss, D., Di Vincenzo, D.P., (1998) Phys. Rev. a, 57, p. 120. , PLRAAN 1050-2947 10.1103/PhysRevA.57.120 Elzerman, J.M., (2004) Nature (London), 430, p. 431. , NATUAS 0028-0836 10.1038/nature02693 Kroutvar, M., (2004) Nature (London), 432, p. 81. , NATUAS 0028-0836 10.1038/nature03008 Khaetskii, A.V., Nazarov, Y.V., (2000) Phys. Rev. B, 61, p. 12639. , PRBMDO 0163-1829 10.1103/PhysRevB.61.12639 Khaetskii, A.V., Nazarov, Y.V., (2001) Phys. Rev. B, 64, p. 125316. , PRBMDO 0163-1829 10.1103/PhysRevB.64.125316 Bernardot, F., Aubry, E., Tribollet, J., Testelin, C., Chamarro, M., Lombez, L., Brauun, P.F., Gerard, J.M., (2006) Phys. Rev. B, 73, p. 085301. , PRBMDO 0163-1829 10.1103/PhysRevB.73.085301 Eble, B., Krebs, O., Lemaitre, A., Kowalik, K., Kudelski, A., Voisin, P., Urbaszek, B., Amand, T., (2006) Phys. Rev. B, 74, p. 081306. , PRBMDO 0163-1829 10.1103/PhysRevB.74.081306 Lombez, L., Braun, P.F., Marie, X., Renucci, P., Urbaszek, B., Amand, T., Krebs, O., Voisin, P., (2007) Phys. Rev. B, 75, p. 195314. , PRBMDO 0163-1829 10.1103/PhysRevB.75.195314 Urbaszek, B., Braun, P.F., Amand, T., Krebs, O., Belhadj, T., Lemaitre, A., Voisin, P., Marie, X., (2007) Phys. Rev. B, 76, p. 201301. , PRBMDO 0163-1829 10.1103/PhysRevB.76.201301 Petta, J.R., (2005) Science, 309, p. 2180. , SCIEAS 0036-8075 10.1126/science.1116955 Greilich, A., (2006) Science, 313, p. 341. , SCIEAS 0036-8075 10.1126/science.1128215 Merkulov, I.A., Efros, A.L., Rosen, M., (2002) Phys. Rev. B, 65, p. 205309. , PRBMDO 0163-1829 10.1103/PhysRevB.65.205309 Erlingsson, S.I., Nazarov, Y.V., (2002) Phys. Rev. B, 66, p. 155327. , PRBMDO 0163-1829 10.1103/PhysRevB.66.155327 Khaetskii, A.V., Loss, D., Glazman, L., (2002) Phys. Rev. Lett., 88, p. 186802. , PRLTAO 0031-9007 10.1103/PhysRevLett.88.186802 Woods, L.M., Reinecke, T.L., Lyanda-Geller, Y., (2002) Phys. Rev. B, 66, p. 161318. , PRBMDO 0163-1829 10.1103/PhysRevB.66.161318 Semenov, Y.G., Kim, K.W., (2004) Phys. Rev. Lett., 92, p. 026601. , PRLTAO 0031-9007 10.1103/PhysRevLett.92.026601 Semenov, Y.G., Kim, K.W., (2007) Phys. Rev. B, 75, p. 195342. , PRBMDO 0163-1829 10.1103/PhysRevB.75.195342 Coish, W.A., (2007) J. Appl. Phys., 101, p. 081715. , JAPIAU 0021-8979 10.1063/1.2722783 Jiang, J.H., Wang, Y.Y., Wu, M.W., (2008) Phys. Rev. B, 77, p. 035323. , PRBMDO 0163-1829 10.1103/PhysRevB.77.035323 Woods, L.M., Reinecke, T.L., Rajagopal, A.K., (2008) Phys. Rev. B, 77, p. 073313. , PRBMDO 0163-1829 10.1103/PhysRevB.77.073313 Coish, W.A., Fischer, J., Loss, D., (2008) Phys. Rev. B, 77, p. 125329. , PRBMDO 0163-1829 10.1103/PhysRevB.77.125329 Greilich, A., (2006) Phys. Rev. Lett., 96, p. 227401. , PRLTAO 0031-9007 10.1103/PhysRevLett.96.227401 Gurudev Dutt, M.V., Cheng, J., Li, B., Xu, X., Li, X., Berman, P.R., Steel, D.G., Sham, L.J., (2005) Phys. Rev. Lett., 94, p. 227403. , PRLTAO 0031-9007 10.1103/PhysRevLett.94.227403 Braun, P.-F., (2005) Phys. Rev. Lett., 94, p. 116601. , PRLTAO 0031-9007 10.1103/PhysRevLett.94.116601 Greilich, A., Wiemann, M., Hernandez, F.G.G., Yakovlev, D.R., Yugova, I.A., Bayer, M., Shabaev, A., Wieck, A.D., (2007) Phys. Rev. B, 75, p. 233301. , PRBMDO 0163-1829 10.1103/PhysRevB.75.233301 We also observe spin coherence for temperatures higher than 100 K but then the dephasing times drop into the range of the trion lifetime. Several reasons may contribute: Besides fast hole scattering, electron scattering can be relevant as LO phonons become available, which may even lead to thermal emission of electrons so that the coherent signal may increasingly be contributed by neutral excitons. As no clear distinction is possible at the moment, we restrict to temperatures below 100 KTsitsishvili, E., Lozano, G.S., Gogolin, A.O., (2004) Phys. Rev. B, 70, p. 115316. , PRBMDO 0163-1829 10.1103/PhysRevB.70.115316 Bulaev, D.V., Loss, D., (2005) Phys. Rev. B, 71, p. 205324. , PRBMDO 0163-1829 10.1103/PhysRevB.71.205324 Caldeira, A.O., Leggett, A.J., (1983) Ann. Phys. (N.Y.), 149, p. 374. , APNYA6 0003-4916 10.1016/0003-4916(83)90202-6 Caldeira, A.O., Leggett, A.J., (1985) Phys. Rev. a, 31, p. 1059. , PLRAAN 1050-2947 10.1103/PhysRevA.31.1059 Westfahl Jr., H., Caldeira, A.O., Medeiros-Ribeiro, G., Cerro, M., (2004) Phys. Rev. B, 70, p. 195320. , PRBMDO 0163-1829 10.1103/PhysRevB.70.195320 Hartmann, L., Goychuk, I., Grifoni, M., Hanggi, P., (2000) Phys. Rev. e, 61, p. 4687. , PLEEE8 1063-651X 10.1103/PhysRevE.61.R4687 Brito, F., Westfahl Jr., H., Caldeira, A.O., Medeiros-Ribeiro, G., arXiv:cond-mat/0703009 (unpublished)Golovach, V.N., Khaetskii, A., Loss, D., (2004) Phys. Rev. Lett., 93, p. 016601. , PRLTAO 0031-9007 10.1103/PhysRevLett.93.016601 (1982) Semiconductors: Physics of Group IV Elements and III-V Compounds, 17. , edited by O. Madelung, Landolt-Börnstein, New Series, Group III, Vol. Springer-Verlag, Berlin