In solid-state materials, the static and dynamic properties as well as the magnetic and electronic characteristics are crucially influenced by the crystal symmetry. Hexagonal structures play a particularly important role and lead to novel physics, such as that of carbon nanotubes or graphene. Here we report on the realization of ultracold atoms in a spin-dependent optical lattice with hexagonal symmetry. We show how the combined effects of the lattice and interactions between atoms lead to a forced antiferromagnetic Néel order when two spin-components localize at different lattice sites. We also demonstrate that the coexistence of two components-one Mott-insulating and the other one superfluid-leads to an interaction-induced modulation of the superfluid density, which is observed spectroscopically. Our studies reveal the vast impact of the interaction-induced modulation on the superfluid-to-Mott- insulator transition. The observations are consistent with theoretical predictions using Gutzwiller mean-field theory.

Multi-component quantum gases in spin-dependent hexagonal lattices / Soltan-Panahi, P.; Struck, J.; Hauke, P.; Bick, A.; Plenkers, W.; Meineke, G.; Becker, C.; Windpassinger, P.; Lewenstein, M.; Sengstock, K.. - In: NATURE PHYSICS. - ISSN 1745-2473. - ELETTRONICO. - 7:5(2011), pp. 434-440. [10.1038/nphys1916]

Multi-component quantum gases in spin-dependent hexagonal lattices

Hauke P.;
2011

Abstract

In solid-state materials, the static and dynamic properties as well as the magnetic and electronic characteristics are crucially influenced by the crystal symmetry. Hexagonal structures play a particularly important role and lead to novel physics, such as that of carbon nanotubes or graphene. Here we report on the realization of ultracold atoms in a spin-dependent optical lattice with hexagonal symmetry. We show how the combined effects of the lattice and interactions between atoms lead to a forced antiferromagnetic Néel order when two spin-components localize at different lattice sites. We also demonstrate that the coexistence of two components-one Mott-insulating and the other one superfluid-leads to an interaction-induced modulation of the superfluid density, which is observed spectroscopically. Our studies reveal the vast impact of the interaction-induced modulation on the superfluid-to-Mott- insulator transition. The observations are consistent with theoretical predictions using Gutzwiller mean-field theory.
5
Soltan-Panahi, P.; Struck, J.; Hauke, P.; Bick, A.; Plenkers, W.; Meineke, G.; Becker, C.; Windpassinger, P.; Lewenstein, M.; Sengstock, K.
Multi-component quantum gases in spin-dependent hexagonal lattices / Soltan-Panahi, P.; Struck, J.; Hauke, P.; Bick, A.; Plenkers, W.; Meineke, G.; Becker, C.; Windpassinger, P.; Lewenstein, M.; Sengstock, K.. - In: NATURE PHYSICS. - ISSN 1745-2473. - ELETTRONICO. - 7:5(2011), pp. 434-440. [10.1038/nphys1916]
File in questo prodotto:
File Dimensione Formato  
1005.1276.pdf

accesso aperto

Tipologia: Pre-print non referato (Non-refereed preprint)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 9.96 MB
Formato Adobe PDF
9.96 MB Adobe PDF Visualizza/Apri
nphys1916.pdf

Solo gestori archivio

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 2.29 MB
Formato Adobe PDF
2.29 MB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/252208
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 249
  • ???jsp.display-item.citation.isi??? 246
social impact