2000/02/07 by Peter J. Burke, I. B. Spielman, J. P. Eisenstein +2 · 3 citations
Engineering · Materials Science · Physics and Astronomy · Chemistry · #Semiconductor materials and devices #Electronic and Structural Properties of Oxides #Surface and Thin Film Phenomena #Kinetic inductance #Drude model #Fermi gas #Condensed matter physics #Conductivity #Scattering #Electron #Transmission line #Electrical resistivity and conductivity #Electron mobility #Physics #Scattering rate #Momentum (technical analysis) #Electrical impedance #Inductance #Chemistry #Optics #Electrical engineering #Quantum mechanics
paper · doi:10.1063/1.125881
openalex publication_date 2000/02/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/11
We measure the real and imaginary conductivity σ(k=0,ω) of a high-mobility two-dimensional electron gas (2DEG) system at frequencies below and above the momentum scattering rate. The imaginary part of the 2DEG impedance is observed to be inductive, consistent with the Drude model. Using this kinetic inductance, we construct a transmission line by capacitively coupling the 2DEG to an Al Schottky barrier gate separated by 5000 Å from the 2DEG. The measured wave velocity and temperature-dependent damping of this transmission line are in good agreement with a simple Drude model. Exciting these modes is equivalent to exciting a 2D plasma mode strongly modified by the interaction between the 2DEG and the gate.