Phase-sensitive probes of nuclear polarization in spin-blockaded transport
Name
Rudner-2010-Phase-sensitive prob.pdf
Size
274.19 KB
Format
Adobe PDF
Checksum (MD5)
7b690595b3feec2b91c5b9df7a044a39
Author(s)
Levitov, Leonid
Halperin, B. I.
Rudner, M. S.
Neder, I.
Date Issued
July 2010
Journal
Physical Review B
Publisher
American Physical Society
Citation
Rudner, M. S. et al. “Phase-sensitive probes of nuclear polarization in spin-blockaded transport.” Physical Review B 82.4 (2010): 041311. © 2010 The American Physical Society.
Version
Final published version
Abstract
Spin-blockaded quantum dots provide a unique setting for studying nuclear-spin dynamics in a nanoscale system. Despite recent experimental progress, observing phase-sensitive phenomena in nuclear spin dynamics remains challenging. Here we point out that such a possibility opens up in the regime where hyperfine exchange directly competes with a purely electronic spin-flip mechanism such as the spin-orbital interaction. Interference between the two spin-flip processes, resulting from long-lived coherence of the nuclear-spin bath, modulates the electron-spin-flip rate, making it sensitive to the transverse component of nuclear polarization. In a system repeatedly swept through a singlet-triplet avoided crossing, nuclear precession is manifested in oscillations and sign reversal of the nuclear-spin pumping rate as a function of the waiting time between sweeps. This constitutes a purely electrical method for the detection of coherent nuclear-spin dynamics.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevB.82.041311
