Ghosh, A;
Wright, MH;
Siegert, C;
Pepper, M;
Farrer, I;
Ford, CJB;
Ritchie, DA;
(2005)
Zero-bias anomaly and kondo-assisted quasiballistic 2D transport.
PHYS REV LETT
, 95
(6)
, Article 066603. 10.1103/PhysRevLett.95.066603.
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Abstract
Nonequilibrium transport measurements in mesoscopic quasiballistic 2D electron systems show an enhancement in the differential conductance around the Fermi energy. At very low temperatures, such a zero-bias anomaly splits, leading to a suppression of linear transport at low energies. We also observed a scaling of the nonequilibrium characteristics at low energies which resembles electron scattering by two-state systems, addressed in the framework of two-channel Kondo model. Detailed sample-to-sample reproducibility indicates an intrinsic phenomenon in unconfined 2D systems in the low electron-density regime.
| Type: | Article |
|---|---|
| Title: | Zero-bias anomaly and kondo-assisted quasiballistic 2D transport |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.95.066603 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.95.066603 |
| Language: | English |
| Additional information: | © 2005 The American Physical Society |
| Keywords: | 2-LEVEL TUNNELING SYSTEMS, MAGNETIC-FIELD, QUANTUM DOTS, CONDUCTANCE, JUNCTIONS, SCATTERING, COULOMB, BARRIER, METALS, ATOMS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1314417 |
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