Observation of experimental negative differential resistance at room temperature due to electron tunneling in a multiple-step single-barrier GaAlAs heterostructure is reported. Theoretical investigations of a three-step single-barrier heterostructure were conducted using the transfer matrix method and the Tsu-Esaki approach to obtain the transmission coefficients and current-voltage characteristic, respectively. The system was designed based on these calculations, and grown with molecular beam epitaxy. The diode exhibited negative differential resistance at 300 K and had a peak-to-valley current ratio above unity, which was in agreement with the predicted values. (C) 2004 American Institute of Physics.
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Univ Calif Los Angeles, Dept Elect Engn, Device Res Lab, Los Angeles, CA 90095 USAUniv Calif Los Angeles, Dept Elect Engn, Device Res Lab, Los Angeles, CA 90095 USA
Xue, Mei
Kabehie, Sanaz
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Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USAUniv Calif Los Angeles, Dept Elect Engn, Device Res Lab, Los Angeles, CA 90095 USA
Kabehie, Sanaz
Stieg, Adam Z.
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Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USAUniv Calif Los Angeles, Dept Elect Engn, Device Res Lab, Los Angeles, CA 90095 USA
Stieg, Adam Z.
Tkatchouk, Ekaterina
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CALTECH, Mat & Proc Simulat Ctr, Pasadena, CA 91125 USAUniv Calif Los Angeles, Dept Elect Engn, Device Res Lab, Los Angeles, CA 90095 USA
Tkatchouk, Ekaterina
Benitez, Diego
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CALTECH, Mat & Proc Simulat Ctr, Pasadena, CA 91125 USAUniv Calif Los Angeles, Dept Elect Engn, Device Res Lab, Los Angeles, CA 90095 USA
Benitez, Diego
Stephenson, Rachel M.
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Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USAUniv Calif Los Angeles, Dept Elect Engn, Device Res Lab, Los Angeles, CA 90095 USA
Stephenson, Rachel M.
Goddard, William A.
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CALTECH, Mat & Proc Simulat Ctr, Pasadena, CA 91125 USAUniv Calif Los Angeles, Dept Elect Engn, Device Res Lab, Los Angeles, CA 90095 USA
Goddard, William A.
Zink, Jeffrey I.
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Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA
Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USAUniv Calif Los Angeles, Dept Elect Engn, Device Res Lab, Los Angeles, CA 90095 USA
Zink, Jeffrey I.
Wang, Kang L.
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Univ Calif Los Angeles, Dept Elect Engn, Device Res Lab, Los Angeles, CA 90095 USA
Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USAUniv Calif Los Angeles, Dept Elect Engn, Device Res Lab, Los Angeles, CA 90095 USA