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Solid state cloaking for electrical charge carrier mobility control

United States Patent

July 7, 2015
View the Complete Patent at the US Patent & Trademark Office
An electrical mobility-controlled material includes a solid state host material having a controllable Fermi energy level and electrical charge carriers with a charge carrier mobility. At least one Fermi level energy at which a peak in charge carrier mobility is to occur is prespecified for the host material. A plurality of particles are distributed in the host material, with at least one particle disposed with an effective mass and a radius that minimize scattering of the electrical charge carriers for the at least one prespecified Fermi level energy of peak charge carrier mobility. The minimized scattering of electrical charge carriers produces the peak charge carrier mobility only at the at least one prespecified Fermi level energy, set by the particle effective mass and radius, the charge carrier mobility being less than the peak charge carrier mobility at Fermi level energies other than the at least one prespecified Fermi level energy.
Zebarjadi; Mona (East Brunswick, NJ), Liao; Bolin (Cambridge, MA), Esfarjani; Keivan (East Brunswick, NJ), Chen; Gang (Carlisle, MA)
Massachusetts Institute of Technology (Cambridge, MA)
14/ 017,421
September 4, 2013
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH This invention was made with Government support under Contract No. DE-FG02-09ER46577, awarded by the Department of Energy; and under Contract No. FA9550-10-1-0533, awarded by the Air Force. The Government has certain rights in the invention.