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Interface and Luminescence Properties of Pulsed Laser Deposited MgxZn1-xO/ZnO Quantum Wells with Strong Confinement

  • Susanne Heitsch (a1), Gregor Zimmermann (a2), Alexander Müller (a3), Jörg Lenzner (a4), Holger Hochmuth (a5), Gabriele Benndorf (a6), Michael Lorenz (a7) and Marius Grundmann (a8)...

MgxZn1-xO/ZnO/MgxZn1-xO quantum wells (QWs) (0.12 ≤ x ≤ 0.15) have been grown on a-plane sapphire substrates by pulsed laser deposition. The nominal ZnO well layer thickness lies between 1.2 nm and 6 nm. Atomic force microscopy (AFM) investigations at ZnO/MgxZn1−xO heterostructures show the film-like structure of the ZnO layers. Their root mean square surface roughness of ∼ 0.5 nm gives information about the interface roughness in the QWs. AFM results from the MgxZn1−xO barrier layers show the same surface structure and roughness. We confirmed the lateral homogeneity of the Mg distribution in the MgxZn1−xO barrier layers by scanning cathodoluminescence measurements. The QWs show a bright and laterally homogeneous luminescence, suggesting good crystalline quality of the ZnO wells. The measured QW photoluminescence energies agree well with calculated values and display the presence of the quantum-confined Stark effect. As a result of quantum confinement a high-energy shift of the ZnO excitonic photoluminescence of 222 meV is observed in the thinnest QW.

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1. See, for example, Makino, T., Superlattice. Microst. 38, 231 (2005) and references therein.
2. Morhain, C., Bretagnon, T., Lefebvre, P., Tang, X., Valvin, P., Guillet, T., Gil, B., Taliercio, T., Teisseire-Doninelli, M., Vinter, B., Deparis, C., Phys. Rev. B 72, 241305 (R) (2005).
3. Morhain, C., Tang, X., Teisseire-Doninelli, M., Lo, B., Laügt, M., Chauveau, J.-M., Vinter, B., Tottereau, O., Vennéguès, P., Deparis, C., Neu, G., Superlattice. Microst. 38, 455 (2005).
4. Heitsch, S., Benndorf, G., Zimmermann, G., Schulz, C., Spemann, D., Hochmuth, H., Schmidt, H., Nobis, Th., Lorenz, M., Grundmann, M., Appl. Phys. A (in press), and references therein.
5. Ohtomo, A., Kawasaki, M., Ohkubo, I., Koinuma, H., Yasuda, T., Segawa, Y., Appl. Phys. Lett. 75, 980 (1999).
6. Sadofev, S., Blumstengel, S., Cui, J., Puls, J., Rogaschewski, S., Schäfer, P., Sadofyev, Y. G., Henneberger, F., Appl. Phys. Lett. 87, 091903 (2005).
7. Krishnamoorthy, S., Iliadis, A.A., Inumpudi, A., Choopun, S., Vispute, R.D., Venkatesan, T., Solid-State Electron. 46, 1633 (2002).
8. Muth, J.F., Teng, C.W., Sharma, A.K., Kvit, A., Kolbas, R.M., Narayan, J., Mat. Res. Soc. Symp. 617, J6.7 (2000).
9. Heitsch, S., Zimmermann, G., Fritsch, D., Sturm, C., Schmidt-Grund, R., Schulz, C., Hochmuth, H., Spemann, D., Benndorf, G., Rheinländer, B., Nobis, Th., Lorenz, M., and Grundmann, M., J. Appl. Phys. (in press).
10. Coli, G., Bajaj, K. K., Appl. Phys. Lett. 78, 2861 (2001).
11. Button, K. J., Cohn, D. R., von Ortenbert, M., Lax, B., Mollwo, E., Helbig, R., Phys. Rev. Lett. 28, 1637 (1972).
12. Hümmer, K., Phys. Status Solidi B 56, 249 (1973).
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