Regensburg 2004 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

HL: Halbleiterphysik

HL 28: Optische Eigenschaften

HL 28.5: Talk

Wednesday, March 10, 2004, 16:15–16:30, H17

Electro-optical properties of ZnO-BaTiO₃-ZnO heterostructures grown by pulsed laser deposition — •M. Schubert¹, N. Ashkenov¹, T. Hofmann¹, M. Lorenz¹, H. v. Wenckstern¹, M. Grundmann¹, and G. Wagner² — ¹Fakultät für Physik und Geowissenschaften, Instititut für Experimentelle Physik II, Universität Leipzig, Linnéstraße 5, 04103 Leipzig — ²Institut für Nichtklassische Chemie, Universität Leipzig, 04318 Leipzig, Germany

Electro-optical birefringence measurements by spectroscopic ellipsometry on ZnO-BaTiO₃-ZnO heterostructures, grown by pulsed laser deposition on (0001) sapphire are reported. Wurtzite-structure ZnO layers serve as transparent conducting electrodes. An interesting hysteresis is observed, tentatively assigned due to coupling between wurtzite and ferroelectric polarization, and ferroelectric phase transition.