97 citations · 203 across the 5 of their papers we have counts for
12 papers
Spin susceptibility and effective mass of two-dimensional electrons in MgxZn1-xO/ZnO heterostructures
A. Tsukazaki, A. Ohtomo, M. Kawasaki +9
We report measurements of the spin susceptibility and the electron effective mass for two-dimensional electrons confined at the interfaces of MgxZn1-xO/ZnO single heterostructures…
Shifting donor-acceptor photoluminescence in N-doped ZnO
Takayuki Makino, A. Tsukazaki, A. Ohtomo +2
We have grown nitrogen-doped ZnO films grown by two kinds of epitaxial methods on lattice-matched ScAlMgO substrates. We measured the photoluminescence (PL) of the two kinds of…
Hole Transport in p-Type ZnO
Takayuki Makino, Akira Ohtomo, A. Tsukazaki +2
A two-band model involving the A- and B-valence bands was adopted to analyze the temperature dependent Hall effect measured on N-doped \textit{p}-type ZnO. The hole transport chara…
Growth mode control of the free carrier density in SrTiO3-d films
Akira Ohtomo, Harold Y. Hwang
We have studied the growth dynamics and electronic properties of SrTiO3-d homoepitaxial films by pulsed laser deposition. We find the two dominant factors determining the growth mo…
Monte-Carlo simulation of localization dynamics of excitons in ZnO and CdZnO quantum well structures
T. Makino, K. Saito, A. Ohtomo +3
Localization dynamics of excitons was studied for ZnO/MgZnO and CdZnO/MgZnO quantum wells (QW). The experimental photoluminescence (PL) and absorption data were compared with the r…
Majority-Carrier Mobilities in Undoped and \textit{n}-type Doped ZnO Epitaxial Layers
T. Makino, Y. Segawa, A. Tsukazaki +2
Transparent and conductive ZnO:Ga thin films are prepared by laser molecular-beam epitaxy. Their electron properties were investigated by the temperature-dependent Hall-effect tech…