Probing the intrinsic state of a one-dimensional quantum well with photon-assisted tunneling

S. E. Shafranjuk

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The photon-assisted tunneling (PAT) through a single wall carbon nanotube quantum well (QW) is suggested for probing the Tomonaga-Luttinger liquid (TLL) state. The elementary TLL excitations inside the quantum well are density (ρ±) and spin (σ±) bosons. The bosons populate the quantized energy levels εn ρ+ =Δn/g and εn ρ- (σ±)=Δn where Δ=h vF/L is the interlevel spacing, n is an integer number, L is the tube length, and g is the TLL parameter. Since the external electromagnetic field acts on the ρ+ bosons only whereas the neutral ρ- and σ± bosons remain unaffected, the PAT spectroscopy is able of identifying the ρ+ levels in the QW setup. The spin εn σ+ boson levels in the same QW are recognized from Zeeman splitting when applying a dc magnetic field H≠0. Basic TLL parameters are readily extracted from the differential conductivity curves.

Original languageEnglish (US)
Article number235115
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume78
Issue number23
DOIs
StatePublished - Dec 1 2008

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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