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

TY - JOUR

T1 - Relaxation and Dephasing in a Two-Electron 13C Nanotube Double Quantum Dot

AU - Churchill, H O H

AU - Kuemmeth, Ferdinand

AU - Harlow, J W

AU - Bestwick, A J

AU - Rashba, E I

AU - Flensberg, K

AU - Stwertka, C H

AU - Taychatanapat, T

AU - Watson, S K

AU - Marcus, C M

PY - 2009/4/22

Y1 - 2009/4/22

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevLett.102.166802

DO - 10.1103/PhysRevLett.102.166802

M3 - Journal article

SN - 0031-9007

VL - 102

SP - 166802

JO - Physical Review Letters

JF - Physical Review Letters

IS - 16

ER -