| Full text | |
| Author(s): |
Total Authors: 4
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| Affiliation: | [1] Florida State Univ, Dept Phys, Tallahassee, FL 32306 - USA
[2] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 - USA
[3] Tech Univ Dresden, Inst Theoret Phys, D-01062 Dresden - Germany
[4] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
Total Affiliations: 4
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| Document type: | Journal article |
| Source: | Physical Review Letters; v. 114, n. 5 FEB 3 2015. |
| Web of Science Citations: | 1 |
| Abstract | |
We perform variational studies of the interaction-localization problem to describe the interaction-induced renormalizations of the effective (screened) random potential seen by quasiparticles. Here we present results of careful finite-size scaling studies for the conductance of disordered Hubbard chains at half-filling and zero temperature. While our results indicate that quasiparticle wave functions remain exponentially localized even in the presence of moderate to strong repulsive interactions, we show that interactions produce a strong decrease of the characteristic conductance scale g{*} signaling the crossover to strong localization. This effect, which cannot be captured by a simple renormalization of the disorder strength, instead reflects a peculiar non-Gaussian form of the spatial correlations of the screened disordered potential, a hitherto neglected mechanism to dramatically reduce the impact of Anderson localization (interference) effects. (AU) | |
| FAPESP's process: | 07/57630-5 - Non-perturbative methods applied to strongly correlated electronic systems |
| Grantee: | Eduardo Miranda |
| Support Opportunities: | Research Projects - Thematic Grants |