Effects Of Growth-direction Electric And Magnetic Fields On Excitons In Gaas- Ga1-x Alx As Coupled Double Quantum Wells

Direct and indirect excitons in GaAs- Ga1-x Alx As coupled double quantum wells, under growth-direction applied electric and magnetic fields, have been theoretically investigated within a variational procedure in the effective-mass and parabolic-band approximations. The exciton hydrogenic 1s -like envelope wave function is obtained through a variational procedure and an appropriate expansion in trigonometric functions of the electron and hole wave functions. The applied electric field produces a polarization of the exciton by pushing the electron and hole away from each other, whereas the magnetic field contracts the exciton by pushing the electron and hole closer to each other. Intersubband mixing produced by the Coulomb interaction of electron-hole pairs is taken into account and a detailed analysis of the properties of direct- and indirect-exciton states in GaAs- Ga1-x Alx As coupled double quantum wells is presented, with theoretical results in good agreement with available experimental measurements. © 2008 The American Physical Society.7711Orlita, M., Grill, R., Hlídek, P., Zvára, M., Döhler, G.H., Malzer, S., Byszewski, M., (2005) Phys. Rev. B, 72, p. 165314. , PRBMDO 0163-1829 10.1103/PhysRevB.72.165314Ashkinadze, B.M., Cohen, E., Rudenkov, V.V., Christianen, P.C.M., Maan, J.C., Pfeiffer, L.N., (2007) Phys. Rev. B, 76, p. 075344. , PRBMDO 0163-1829 10.1103/PhysRevB.76.075344Gärtner, A., Prechtel, L., Schuh, D., Holleitner, A.W., Kotthaus, J.P., (2007) Phys. Rev. B, 76, p. 085304. , PRBMDO 0163-1829 10.1103/PhysRevB.76.085304Lee, K., Kyu Noh, S., Kyung Chang, S., (2007) Phys. Rev. B, 76, p. 073305. , PRBMDO 0163-1829 10.1103/PhysRevB.76.073305Galbraith, I., Duggan, G., (1989) Phys. Rev. B, 40, p. 5515. , PRBMDO 0163-1829 10.1103/PhysRevB.40.5515Greene, R.L., Bajaj, K.K., (1988) Phys. Rev. B, 37, p. 4604. , PRBMDO 0163-1829 10.1103/PhysRevB.37.4604Fox, A.M., Miller, D.A.B., Livescu, G., Cunningham, J.E., Jan, W.Y., (1991) Phys. Rev. B, 44, p. 6231. , PRBMDO 0163-1829 10.1103/PhysRevB.44.6231Cen, J., Branis, S.V., Bajaj, K.K., (1991) Phys. Rev. B, 44, p. 12848. , PRBMDO 0163-1829 10.1103/PhysRevB.44.12848Soubusta, J., Grill, R., Hlídek, P., Zvára, M., Smrcka, L., Malzer, S., Geißelbrecht, W., Döhler, G.H., (1999) Phys. Rev. B, 60, p. 7740. , PRBMDO 0163-1829 10.1103/PhysRevB.60.7740Lozovik, Y.E., Ovchinnikov, I.V., Yu. Volkov, S., Butov, L.V., Chemla, D.S., (2002) Phys. Rev. B, 65, p. 235304. , PRBMDO 0163-1829 10.1103/PhysRevB.65.235304Butov, L.V., Imamoglu, A., Mintsev, A.V., Campman, K.L., Gossard, A.C., (1999) Phys. Rev. B, 59, p. 1625. , PRBMDO 0163-1829 10.1103/PhysRevB.59.1625Butov, L.V., Mintsev, A.V., Lozovik, Y.E., Campman, K.L., Gossard, A.C., (2000) Phys. Rev. B, 62, p. 1548. , PRBMDO 0163-1829 10.1103/PhysRevB.62.1548Parlangeli, A., Christianen, P.C.M., Maan, J.C., Tokatly, I.V., Soerensen, C.B., Lindelof, P.E., (2000) Phys. Rev. B, 62, p. 15323. , PRBMDO 0163-1829 10.1103/PhysRevB.62.15323Butov, L.V., Shashkin, A.A., Dolgopolov, V.T., Campman, K.L., Gossard, A.C., (1999) Phys. Rev. B, 60, p. 8753. , PRBMDO 0163-1829 10.1103/PhysRevB.60.8753De Dios-Leyva, M., Duque, C.A., Oliveira, L.E., (2007) Phys. Rev. B, 76, p. 075303. , PRBMDO 0163-1829 10.1103/PhysRevB.76.075303Gorkov, L.P., Dzyaloshinskii, I.E., (1968) Sov. Phys. JETP, 26, p. 449. , SPHJAR 0038-5646Chang, K., Peeters, F.M., (2001) Phys. Rev. B, 63, p. 153307. , PRBMDO 0163-1829 10.1103/PhysRevB.63.153307Li, E.H., (2000) Physica e (Amsterdam), 5, p. 215. , PELNFM 1386-9477 10.1016/S1386-9477(99)00262-3Xia, J.-B., Fan, W.-J., (1989) Phys. Rev. B, 40, p. 8508. , PRBMDO 0163-1829 10.1103/PhysRevB.40.850