L
L. N. Pfeiffer
Researcher at Alcatel-Lucent
Publications - 485
Citations - 12683
L. N. Pfeiffer is an academic researcher from Alcatel-Lucent. The author has contributed to research in topics: Quantum Hall effect & Quantum well. The author has an hindex of 55, co-authored 450 publications receiving 12016 citations.
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Observation of magnetoplasmons, rotons, and spin-flip excitations in GaAs quantum wires.
TL;DR: Inelastic light scattering spectra of the one-dimensional electron gas in GaAs quantum wires embedded in a strong perpendicular magnetic field show long-wavelength collective excitations and display multiple structures that indicate the magnetoroton density of states.
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Evidence of a First-Order Phase Transition Between Wigner-Crystal and Bubble Phases of 2D Electrons in Higher Landau Levels
TL;DR: Two resonances in the real diagonal microwave conductivity of a two-dimensional electron system (2DES) at low temperature T approximately 35 mK are detected, taken as evidence of a first-order phase transition.
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Direct measurement of exciton-exciton interaction energy.
TL;DR: A direct measurement of the spectral function (real and imaginary self-energy) of excitons with a repulsive interaction potential is reported, which allows a stringent test of many-body theories of the exciton-exciton interaction which is independent of theexciton density calibration.
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Intrinsic gap of the nu=5/2 fractional quantum Hall state.
Cory Dean,Benjamin A. Piot,Patrick Hayden,S. Das Sarma,Guillaume Gervais,L. N. Pfeiffer,Ken W. West +6 more
TL;DR: The role of disorder on the 5/2 state of fractional quantum Hall liquids has been examined in this paper, where it is shown that a large discrepancy remains between theory and experiment for the intrinsic gap extrapolated from the infinite mobility limit.
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Evidence of electron correlations in plasmon dispersions of ultralow density two-dimensional electron systems
Cyrus F. Hirjibehedin,Cyrus F. Hirjibehedin,A. Pinczuk,A. Pinczuk,Brian S. Dennis,L. N. Pfeiffer,Ken W. West +6 more
TL;DR: In this paper, inelastic light scattering at wave vectors large enough for both correlation and nonlocal effects to be significant was used to find well-defined plasmons with dispersions that deviate from the ''classical'' $\sqrt{q}$ limit.