Brief Description of my Research : Textures in Bilayer Quantum Hall Systems Combined Spin-Pseudospin In Quantum Hall Systems Nano rings ------------------------ Numerics : Nanonet OU Supercomputer: OSCER -------------------------

Bahman Roostaei ----------------------------------------------------------------------------- Postdoctoral Scholar, 01/2008-present Department of Physics, Case Western Reserve University, Cleveland, OH PhD , 12/2007 Department of Physics and Astronomy The University of Oklahoma BS , 06/1999 Department of Physics Sharif University of Technology , Tehran , Iran ------------------------------------------------------------------------------ Office : Rockefeller , 225 Phone : (216) 368-4007 EMAIL : bxr90[AT] case [DOT] edu Research Interests : My research interest is in the field of condensed matter physics, particularly the theory of strongly correlated electron systems. Novel phenomena observed in low dimensional electron systems at low temperatures have been the subject of my work during past few years. Recent advancements in technology has made it possible to fabricate extremely small structures, of the size of nanometers ( 10^-9 meters). Nanostructures like nanorings or nanowires as one dimensional example are capable of remarkably different physical behavior than what we expect from past experiments. The quantum coherence of electrons observed in two dimensional double quantum wells known as Bilayer Quantum Hall Systems is another example of physically rich and technologically challenging part of the condensed matter physic. Currently I am working on the problem of energy storage in antiferroelectric liquid crystals ( Smectic C_A) at Case university with Prof. Rolfe Petschek. You can find more detail about my work by clicking on the links on the left column of this page. Publications : Polarization Transitions in Quantum Ring Arrays, Bahman Roostaei and Kieran J. Mullen, A. T. Rezakhani, Phys. Rev. B 78, 075411 (2008) Pseudo spin vortex-antivortex states with interwoven spin textures in double layer quantum Hall systems, J. Bourassa, B. Roostaei, R. Cote, H. A. Fertig and K. Mullen, Phys. Rev. B. 74, 195320 (2006) [ Selected for the November 27, 2006 issue of Virtual Journal of Nanoscale Science & Technology.] Theory of activated transport in bilayer quantum Hall systems, Bahman Roostaei, Kieran Mullen, Herbert Fertig, Steven Simon, Phys. Rev. Lett. 101, 046804 (2008) Invited Talks : Department of Physics, Case Western Reserve University, Februrary 2008, Cleveland , OH Bilayer Quantum Hall Effect Department of Physics, University of Texas, May 2007, Austin , TX Spin-Pseudospin Excitations, Activation Energies and Dissipation in Quantum Hall Bilayer Systems at Total Filling Factor $\nu= 1$. University of Arkansas/ 2004, Fayetteville, AK Novel Phenomena in Nanostructure Ring Arrays. University of Oklahoma, Physics Department/ May 2005, Norman, OK Real Spin in Pseudospin Quasiparticles of Bilayer Quantum Hall systems.