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

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• 作者：Yann-Wen Lan^a ; ^c ; ¹ ; K. Aravind^b ; ^c ; ¹ ; Cen-Shawn Wu^d ; Chieh-Hsiung Kuan^a ; Kuei-Shu Chang-Liao^b ; Chii-Dong Chen^c ; ^e ; ^{chiidong@phys.sinica.edu.tw}
• 刊名：Carbon
• 出版年：2012
• 期刊代码：10_00086223
• 类别：ms
• 出版时间：August, 2012
• 卷：50
• 期：10
• 页码：3748-3752
• 文件大小：574 K

摘要

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 螖_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 2渭_orb value of 170 渭eV/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 螖_so/2渭_orb obtained independently.