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Spin-polarized tunneling into helical edge states: asymmetry and conductances
- Publication Year :
- 2016
- Publisher :
- arXiv, 2016.
-
Abstract
- We consider tunneling from the spin-polarized tip into the Luttinger liquid edge state of quantum spin Hall system. This problem arose in context of the spin and charge fractionalization of an injected electron. Renormalization of the dc conductances of the system is calculated in the fermionic approach and scattering states formalism. In lowest order of tunneling amplitude we confirm previous results for the scaling dependence of conductances. Going beyond the lowest order we show that interaction affects not only the total tunneling rate, but also the asymmetry of the injected current. The helical edge state forbids the backscattering, which leads to the possibility of two stable fixed points in renormalization group sense, in contrast to the Y-junction between the usual quantum wires.<br />Comment: 9 pages, 5 figures
- Subjects :
- Physics
Condensed matter physics
Strongly Correlated Electrons (cond-mat.str-el)
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General Physics and Astronomy
FOS: Physical sciences
02 engineering and technology
Electron
Renormalization group
021001 nanoscience & nanotechnology
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
01 natural sciences
Asymmetry
Renormalization
Condensed Matter - Strongly Correlated Electrons
Luttinger liquid
0103 physical sciences
Condensed Matter::Strongly Correlated Electrons
010306 general physics
0210 nano-technology
Spin (physics)
Quantum
Quantum tunnelling
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Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....753dcfe54ef78f00da8b347c19edfe15
- Full Text :
- https://doi.org/10.48550/arxiv.1612.09594