Interplay of spin-orbit coupling and Zeeman effect probed by Kondo resonance in a carbon nanotube quantum dot

Yann Wen Lan, K. Aravind, Cen Shawn Wu, Chieh Hsiung Kuan, Kuei Shu Chang-Liao, Chii Dong Chen

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The spin orbit interaction in a carbon nanotube is probed by Kondo resonance. Spin orbit interaction lifts level degeneracy and leads to additional satellite current peaks along with the zero-bias Kondo resonance peak. From the positions of satellite peaks, the spin-orbit interaction energy Δ so is determined to be 0.38 meV. In the presence of a parallel magnetic field, the satellite peaks split into two; one follows spin-Zeeman dependence with a g-factor of 1.91 and the other one follows orbital-Zeeman dependence with a 2μ orb value of 170 μeV/T. The zero-bias Kondo resonance peak also displays a spin-Zeeman dependence but has an offset in magnetic field of 2.25 T, consistent with the value of Δ so/ 2μ orb obtained independently.

Original languageEnglish
Pages (from-to)3748-3752
Number of pages5
JournalCarbon
Volume50
Issue number10
DOIs
Publication statusPublished - 2012 Aug 1

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Carbon Nanotubes
Semiconductor quantum dots
Carbon nanotubes
Orbits
Satellites
Magnetic fields

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

Cite this

Lan, Yann Wen ; Aravind, K. ; Wu, Cen Shawn ; Kuan, Chieh Hsiung ; Chang-Liao, Kuei Shu ; Chen, Chii Dong. / Interplay of spin-orbit coupling and Zeeman effect probed by Kondo resonance in a carbon nanotube quantum dot. In: Carbon. 2012 ; Vol. 50, No. 10. pp. 3748-3752.
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abstract = "The spin orbit interaction in a carbon nanotube is probed by Kondo resonance. Spin orbit interaction lifts level degeneracy and leads to additional satellite current peaks along with the zero-bias Kondo resonance peak. From the positions of satellite peaks, the spin-orbit interaction energy Δ so is determined to be 0.38 meV. In the presence of a parallel magnetic field, the satellite peaks split into two; one follows spin-Zeeman dependence with a g-factor of 1.91 and the other one follows orbital-Zeeman dependence with a 2μ orb value of 170 μeV/T. The zero-bias Kondo resonance peak also displays a spin-Zeeman dependence but has an offset in magnetic field of 2.25 T, consistent with the value of Δ so/ 2μ orb obtained independently.",
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Interplay of spin-orbit coupling and Zeeman effect probed by Kondo resonance in a carbon nanotube quantum dot. / Lan, Yann Wen; Aravind, K.; Wu, Cen Shawn; Kuan, Chieh Hsiung; Chang-Liao, Kuei Shu; Chen, Chii Dong.

In: Carbon, Vol. 50, No. 10, 01.08.2012, p. 3748-3752.

Research output: Contribution to journalArticle

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AU - Lan, Yann Wen

AU - Aravind, K.

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AU - Chang-Liao, Kuei Shu

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AB - The spin orbit interaction in a carbon nanotube is probed by Kondo resonance. Spin orbit interaction lifts level degeneracy and leads to additional satellite current peaks along with the zero-bias Kondo resonance peak. From the positions of satellite peaks, the spin-orbit interaction energy Δ so is determined to be 0.38 meV. In the presence of a parallel magnetic field, the satellite peaks split into two; one follows spin-Zeeman dependence with a g-factor of 1.91 and the other one follows orbital-Zeeman dependence with a 2μ orb value of 170 μeV/T. The zero-bias Kondo resonance peak also displays a spin-Zeeman dependence but has an offset in magnetic field of 2.25 T, consistent with the value of Δ so/ 2μ orb obtained independently.

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