UNIGE document Scientific Article
previous document  unige:35410  next document
add to browser collection

Competition of spin and charge excitations in the one-dimensional Hubbard model

Sciolla, Bruno
Published in Physical Review. A. 2013, vol. 88, no. 6, p. 063629
Abstract Motivated by recent experiments with ultracold fermionic atoms in optical lattices, we study finite temperature magnetic correlations, as singlet and triplet correlations, and the double occupancy in the one-dimensional Hubbard model. We point out that for intermediate interaction strengths the double occupancy has an intriguing doubly nonmonotonic temperature dependence due to the competition between spin and charge modes, related to the Pomeranchuk effect. Furthermore, we determine properties of magnetic correlations in the temperature regimes relevant for current cold atom experiments and discuss effects of the trap on spatially integrated observables. We estimate the entropy and the temperature reached in the experiment by Greif, Uehlinger, Jotzu, Tarruell, and Esslinger [Science 340, 1307 (2013)].
Full text
Research group Groupe Giamarchi
Project FNS: Division II
(ISO format)
SCIOLLA, Bruno et al. Competition of spin and charge excitations in the one-dimensional Hubbard model. In: Physical Review. A, 2013, vol. 88, n° 6, p. 063629. https://archive-ouverte.unige.ch/unige:35410

429 hits



Deposited on : 2014-04-07

Export document
Format :
Citation style :