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

Autor:	Churchill, H. O. H., Kuemmeth, F., Harlow, J. W., Bestwick, A. J., Rashba, E. I., Flensberg, K., Stwertka, C. H., Taychatanapat, T., Watson, S. K., Marcus, C. M.
Rok vydání:	2008
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science
Zdroj:	Phys. Rev. Lett. 102, 166802 (2009).
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.102.166802
Popis:	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 parallel magnetic field 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 suppresses hyperfine mediated relaxation and enhances relaxation due to soft phonons. The inhomogeneous dephasing time, T2*, is consistent with previous data on hyperfine coupling strength in 13C nanotubes. Comment: related papers at http://marcuslab.harvard.edu
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0811.3239 Zobrazit plný text záznamu View this record from Arxiv