Assisted hopping and interaction effects in impurity models

Abstract

We study, using Numerical Renormalization Group methods, the generalization of the Anderson impurity model where the hopping depends on the filling of the impurity. We show that the model, for sufficiently large values of the assisted hopping term, shows a regime where local pairing correlations are enhanced. These correlations involve pairs fluctuating between on site and nearest neighbor positions.

References in corpus (3)

• Finite temperature numerical renormalization group study of the Mott-transition
• Assisted hopping in the Anderson impurity model: A flow equation study
• Effect of assisted hopping on the formation of local moments in magnetic impurities and quantum dots

Cited by in corpus (7)

• Effect of assisted hopping on thermopower in an interacting quantum dot
• Suppression of Shot Noise in Quantum Point Contacts in the "0.7" Regime
• Charge and heat transport through quantum dots with local and correlated-hopping interactions
• Influence of assisted hopping interaction on the linear conductance of quantum dot
• Many body effects in finite metallic carbon nanotubes
• Influence of Correlated Hybridization on the Conductance of Molecular Transistors
• Signatures of the Correlated-Hopping Interaction in Non-Linear Transport through a Quantum Dot