| cond-mat/0312159 (December 2003) | | Signatures of spin-charge separation in double--quantum-wire tunneling | | Yaroslav Tserkovnyak, Bertr, I. Halperin, Ophir M. Auslaender and Amir Yacoby | Lyman Laboratory of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
Dept. of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel
| | Abstract. We present evidence for spin-charge separation in the tunneling spectrum of a system consisting of two quantum wires connected by a long narrow tunnel junction at the edge of a GaAs/AlGaAs bilayer heterostructure. Multiple excitation velocities are detected in the system by tracing out electron spectral peaks in the conductance dependence on the applied voltage, governing the energy of tunneled electrons, and the magnetic field, governing the momentum shift along the wires. The boundaries of the wires are important and lead to a characteristic interference pattern in measurements on short junctions. We show that the experimentally observed modulation of the conductance oscillation amplitude as a function of the voltage bias can also be accounted for by spin-charge separation of the elementary excitations in the interacting wires. | | Subject. Mesoscopic Systems and Quantum Hall Effect | | Comment. Manuscript for proceedings of the NATO workshop on Theory of Quantum Transport in Metallic and Hybrid Nanostructures, St. Petersburg, August 2003, to be published by Kluwer Academic Publishers B.V., Dordrecht, The Netherlands, edited by V. Kozub and V. Vinokur. Talk was presented by B. I. Halperin | | Article Options | | Full Text (PDF) Full Text (Postscript) Source Files (Gzip / Tar Gzip) Eprint Citation (BibTeX) |
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