Relaxation and Dephasing in a Two-Electron 13C Nanotube Double Quantum Dot

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  • E166802

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We use charge sensing of Pauli blockade (including spin and isospin) in a two-electron 13C nanotube double quantum dot to measure relaxation and dephasing times. The relaxation time T1 first decreases with a parallel magnetic field and then goes through a minimum in a field of 1.4 T. We attribute both results to the spin-orbit-modified electronic spectrum of carbon nanotubes, which at high field enhances relaxation due to bending-mode phonons. The inhomogeneous dephasing time T2* is consistent with previous data on hyperfine coupling strength in 13C nanotubes.
Original languageEnglish
JournalPhysical Review Letters
Issue number16
Pages (from-to)166802
Number of pages4
Publication statusPublished - 22 Apr 2009

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