Variation of the temperature dependence of the energy-relaxation time with magnetic field in open quantum dot arrays at low temperatures

• Published in: Physica. B, Condensed matter Vol. 314; no. 1; pp. 486 - 489
• Main Authors: Prasad, C., Ferry, D.K., Shailos, A., Elhassan, M., Bird, J.P., Lin, L.H., Aoki, N., Ochiai, Y., Ishibashi, K., Aoyagi, Y.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.03.2002; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electrical properties of specific thin films; Electron states and collective excitations in thin films, multilayers, quantum wells, mesoscopic and nanoscale systems; Electronic conduction in metals and alloys; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Electronic transport in condensed matter; Energy-relaxation time; Exact sciences and technology; Iii-v semiconductors; Magnetoconductance; Open quantum dot arrays; Physics; Quantum dots; Relaxation times and mean free paths; Open quantum dot arrays; 73.61.Ey; 72.15.Lh; Energy-relaxation time; Magnetoconductance; 73.20.Dx; Aluminium arsenides; Quantum magnetic field; Temperature dependence; Gallium arsenides; Inorganic compounds; Charge carriers; Semiconductor materials; Variational methods; Magnetic relaxation; Quantum dots; Ternary compounds; Magnetic field effects; Binary compounds; Heat treatments; Relaxation time; Energy relaxation; Time dependence; Electron temperature; Magnetoresistance; Power law
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/S0921-4526(01)01407-7

The variation of the magnetoconductance of two quantum dot arrays fabricated on GaAs/AlGaAs with temperature and sample current was used to extract carrier heating values at various magnetic fields. These measurements yielded a power law dependence of the electron temperature with the sample current and we study its variation with magnetic field. The power law exponent for the energy-relaxation time for both the dot arrays stays nearly constant over the entire magnetic field range.