O. P. Hansen | Researchain

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Featured researches published by O. P. Hansen.

Physical Review B | 1999

POSITIVE MAGNETORESISTANCE AND HOLE-HOLE SCATTERING IN GAAS/AL0.5GA0.5AS HETEROSTRUCTURES UNDER UNIAXIAL COMPRESSION

V. Kravchenko; N. Minina; A. M. Savin; O. P. Hansen; C. B. Sorensen; W. Kraak

Resistance, magnetoresistance and their temperature dependencies have been investigated in the 2D hole gas at a [001] p-GaAs/Al

Journal of Experimental and Theoretical Physics | 2000

Piezoelectric effect and the long-term resistance relaxations induced by uniaxial compression in p-GaAs/AlxGa1−x as heterostructures

V. N. Kravchenko; N. Ya. Minina; A. M. Savin; O. P. Hansen

_{0.5}

High Pressure Research | 2002

Anisotropy of Long-term Resistivity Relaxations Induced in p -(0 0 1)GaAs/Al 0.5 Ga 0.5 As by Uniaxial Stress

V. N. Kravchenko; N. Ya. Minina; A. M. Savin; Irina V. Berman; O. P. Hansen; C. B. Sorensen

Fifth International Conference on Material Science and Material Properties for Infrared Optoelectronics | 2001

Positive persistent photoconductivity in p-type Al0,5Ga0,5As/GaAs/Al0,5Ga0,5As

W. Kraak; N. Ya. Minina; A. M. Savin; E. V. Bogdanov; A. A. Ilievsky; C. B. Sorensen; O. P. Hansen

_{0.5}

High Pressure Research | 2000

Negative and persistent photoconductivity in p-type Al0.5Ga0.5As/GaAs/Al0.5Ga0.5As heterostructures under uniaxial stress

W. Kraak; N. Minina; A. M. Savin; T. Spangenberg; O. P. Hansen; C. B. Sorensen

As heterointerface under [110] uniaxial compression. Analysis performed in the frame of hole-hole scattering between carriers in the two spin splitted subbands of the ground heavy hole state indicates, that h-h scattering is strongly suppressed by uniaxial compression. The decay time

Physical Review B | 1999

ENERGY SPECTRUM AND TOPOLOGY EVOLUTION OF THE FERMI SURFACE OF TWO-DIMENSIONAL HOLES IN GAAS/AL0.5GA0.5AS HETEROSTRUCTURES UNDER UNIAXIAL COMPRESSION : THEORY AND EXPERIMENT

K. I. Kolokolov; Alexander Savin; S. D. Beneslavski; N. Ya. Minina; O. P. Hansen

\tau_{01}

Physical Review B | 1996

EFFECT OF UNIAXIAL COMPRESSION ON QUANTUM HALL PLATEAUS AND SHUBNIKOV-DE HAAS OSCILLATIONS IN P-TYPE GAAS/ALXGA1-XAS HETEROSTRUCTURES

O. P. Hansen; J. S. Olsen; W. Kraak; B. Saffian; N. Ya. Minina; Alexander Savin

of the relative momentum reveals 4.5 times increase at a uniaxial compression of 1.3 kbar.

Physical Review C | 2009

Elliptic flow from collision geometry and rescattering

H. Bøggild; O. P. Hansen; T. J. Humanic

AbstractLong-term resistance relaxations induced by uniaxial compression in (001)p-GaAs/Al0.5Ga0.5 As heterostructures are observed, and the main properties of these relaxations are investigated: the dependence of their character on the direction of the uniaxial compression, the change in concentration of current carriers during the relaxation processes, and the quenching of the relaxations by temperature, illumination, and high electric fields. It is found that the character of the relaxation process is different for compression directions [110] and

Physica E-low-dimensional Systems & Nanostructures | 2004