Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2002-02-21
J. Phys.: Condens. Matter 13 (2001) 9713-9738
Physics
Condensed Matter
Strongly Correlated Electrons
Scientific paper
10.1088/0953-8984/13/43/304
Single-particle dynamics of the Anderson impurity model in the presence of a magnetic field $H$ are considered, using a recently developed local moment approach that encompasses all energy scales, field and interaction strengths. For strong coupling in particular, the Kondo scaling regime is recovered. Here the frequency ($\omega/\omega_{\rm K}$) and field ($H/\omega_{\rm K}$) dependence of the resultant universal scaling spectrum is obtained in large part analytically, and the field-induced destruction of the Kondo resonance investigated. The scaling spectrum is found to exhibit the slow logarithmic tails recently shown to dominate the zero-field scaling spectrum. At the opposite extreme of the Fermi level, it gives asymptotically exact agreement with results for statics known from the Bethe ansatz. Good agreement is also found with the frequency and field-dependence of recent numerical renormalization group calculations. Differential conductance experiments on quantum dots in the presence of a magnetic field are likewise considered; and appear to be well accounted for by the theory. Some new exact results for the problem are also established.
Dickens Nigel L.
Logan David E.
No associations
LandOfFree
Field-dependent dynamics of the Anderson impurity model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Field-dependent dynamics of the Anderson impurity model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Field-dependent dynamics of the Anderson impurity model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-103191