de.mpg.escidoc.pubman.appbase.FacesBean
English
 
Help Guide Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
 
 
DownloadE-Mail
  Quantum criticality in the two-channel pseudogap Anderson model: A test of the non-crossing approximation

Zamani, F., Chowdhury, T., Ribeiro, P., Ingersent, K., & Kirchner, S. (2013). Quantum criticality in the two-channel pseudogap Anderson model: A test of the non-crossing approximation. Physica Status Solidi B, 250(3 Sp. Iss. SI), 547-552. doi:10.1002/pssb.201200928.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-1F22-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-1F23-8
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Zamani, F.1, Author              
Chowdhury, T., Author
Ribeiro, P.1, Author              
Ingersent, K., Author
Kirchner, S.2, Author              
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, escidoc:1863404              
2Stefan Kirchner, cross-PKS/CPfS theory group, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, escidoc:1863475              

Content

show
hide
Free keywords: -
 Abstract: We investigate the dynamical properties of the two-channel Anderson model using the non-crossing approximation (NCA) supplemented by numerical renormalization group (NRG) calculations. We provide evidence supporting the conventional wisdom that the NCA gives reliable results for the standard two-channel Anderson model of a magnetic impurity in a metal. We extend the analysis to the pseudogap two-channel model describing a semi-metallic host with a density of states that vanishes in power-law fashion at the Fermi energy. This model exhibits continuous quantum phase transitions between weak- and strong-coupling phases. The NCA is shown to reproduce the correct qualitative features of the pseudogap model, including the phase diagram, and to yield critical exponents in excellent agreement with the NRG and exact results. The forms of the dynamical magnetic susceptibility and impurity Green's function at the fixed points are suggestive of frequency-over-temperature scaling.

Details

show
hide
Language(s): eng - English
 Dates: 2013-03-07
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 667529
ISI: 000316290200026
DOI: 10.1002/pssb.201200928
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Physica Status Solidi B
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 250 (3 Sp. Iss. SI) Sequence Number: - Start / End Page: 547 - 552 Identifier: ISSN: 0370-1972