Neumaier, Daniel and Wagner, Konrad and Wurstbauer, Ursula and Reinwald, M and Wegscheider, Werner and Weiss, W (2008) Phase coherent transport in (Ga,Mn)As. New Journal of Physics 10, p. 55016.
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Abstract. Quantum interference effects and resulting quantum corrections of the conductivity have been intensively studied in disordered conductors over the last few decades. The knowledge of phase coherence lengths and underlying dephasing mechanisms are crucial in understanding quantum corrections to the resistivity in different material systems. Due to the internal magnetic field and the associated breaking of time-reversal symmetry quantum interference effects in ferromagnetic materials have scarcely been explored. Below, we describe the investigation of phase coherent transport phenomena in the newly discovered ferromagnetic semiconductor (Ga,Mn)As. We explore universal conductance fluctuations in mesoscopic (Ga,Mn)As wires and rings, the AharonovBohm effect in nanoscale rings and weak localization in arrays of wires, made of the ferromagnetic semiconductor material. These experiments allow to probe the phase coherence length L and the spin flip length LSO as well as the temperature dependence of dephasing.
|Institutions:||Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider|
Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss
|Projects:||SFB 689: Spinphänomene in reduzierten Dimensionen|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||25 May 2009 13:18|
|Last Modified:||05 Aug 2009 13:57|