Mott-insulating phases and magnetism of fermions in a double-well optical lattice
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
---|---|
Article number | 61603 |
Journal / Publication | Physical Review A - Atomic, Molecular, and Optical Physics |
Volume | 84 |
Issue number | 6 |
Publication status | Published - 12 Dec 2011 |
Externally published | Yes |
Link(s)
Abstract
We theoretically investigate, using nonperturbative strong correlation techniques, Mott-insulating phases and magnetic ordering of two-component fermions in a two-dimensional double-well optical lattice. At filling of two fermions per site, there are two types of Mott insulators, one of which is characterized by spin-1 antiferromagnetism below the Néel temperature. The superexchange interaction in this system is induced by the interplay between the interband interaction and the spin degree of freedom. A great advantage of the double-well optical lattice is that the magnetic quantum phase diagram and the Néel temperature can be easily controlled by tuning the orbital energy splitting of the two-level system. Particularly, the Néel temperature can be one order of magnitude larger than that in standard optical lattices, facilitating the experimental search for magnetic ordering in optical lattice systems. © 2011 American Physical Society.
Citation Format(s)
Mott-insulating phases and magnetism of fermions in a double-well optical lattice. / Wang, Xin; Zhou, Qi; Das Sarma, S.
In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 84, No. 6, 61603, 12.12.2011.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review