Issue |
EPL
Volume 88, Number 2, October 2009
|
|
---|---|---|
Article Number | 20008 | |
Number of page(s) | 6 | |
Section | General | |
DOI | https://doi.org/10.1209/0295-5075/88/20008 | |
Published online | 05 November 2009 |
Towards a possible charge Kondo effect in optical lattices
1
Lehrstuhl für Theoretische Physik, Technische Universität Dortmund - 44221 Dortmund, Germany, EU
2
Max-Planck-Institut für Chemische Physik fester Stoffe - 01187 Dresden, Germany, EU
3
Department of Physics and Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur, 721302 India
4
Max-Planck-Institut für Physik komplexer Systeme - 01187 Dresden, Germany, EU
Corresponding author: laad@fkt.physik.uni-dortmund.de
Received:
25
August
2009
Accepted:
24
September
2009
The Kondo effect underpins a large body of recent developments in the physics of d- and f-band compounds. Although its charge analog is a rarity in solids, the recent observations of the charge Kondo effect and the consequent rise in superconducting Tc encourage a search for other accessible systems. Motivated by the possibility of wilfully tuning the sign of the inter-electronic interaction in optical lattices, we study conditions for the elusive charge Kondo liquid (CKL) state to manifest. We propose that a combination of Feshbach resonances and sequentially controlled laser pulses may produce the CKL. We show that the CKL is never a stable ground state, appearing only when the ordered ground states are destabilized. Finally, we discuss interesting analogies with nuclear matter.
PACS: 03.75.Ss – Degenerate Fermi gases / 71.10.Fd – Lattice fermion models (Hubbard model, etc.) / 71.10.Hf – Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems
© EPLA, 2009
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