Structure and Dynamics GroupMesoscopic Physics
Two Dimensional Electron Systems
Here we model the specific heat capacity of a two dimensional electron system (2DES) such as those found in a GaAs/AlGaAs heterostructures. The behavior of the specific heat in the presence of an applied magnetic field is shown in the fractional quantum hall regime [1].
The Landau level broadening due to disorder in a 2DES is found to cause variations in its interlevel and intralevel excitations [2].
Quantum Wells
Bound states in quantum wells in the presence of an electric field are numerically obtained using the variational Monte Carlo method. The figure below shows that by varying the electric field there is an equal probability of finding the particle in the well and the barrier created by the field [3].
References
1. R. Gammag and C. Villagonzalo, Thermodynamic Properties of a Two Dimensional Electron Gas in the Fractional Quantum Hall Regime, Proceedings of the Samahang Pisika ng Pilipinas, Vol.3, (ISSN 1656-2666), 24th SPP Physics Congress, Ateneo de Davao University, Davao City, 25-27 October 2006.
2. R. Gammag and C. Villagonzalo, The Interplay of Landau Level Broadening
and Temperature on Two-Dimensional Electron Systems
, Solid State Communications 146, 487 - 490 (2008).
3. Claire Nunez, B.S. Applied Physics Thesis,
A Variational Monte Carlo Study: A Particle in a Quantum Well System in an
External Electric Field, Advisers: Dr. R. Banzon & Dr. C. Villagonzalo,
University of the Philippines, Diliman, Quezon City (May 2007).
