Antiferromagnetism in a bosonic mixture of rubidium ({sup 87}Rb) and potassium ({sup 41}K)

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.041603· OSTI ID:21456976

Shrestha, Uttam ^[1]

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1. LENS, Universita di Firenze, via Nello Carrara 1, I-50019 Sesto Fiorentino, Firenze (Italy)

We simulate the experimental possibility of observing antiferromagnetic (AF) order in bosonic mixtures of rubidium ({sup 87}Rb) and potassium ({sup 41}K) in a two-dimensional optical lattice in the presence of harmonic confinement. By tuning the interspecies interactions and the lattice heights, we have found the ground states, within the mean-field approximation, that interpolate from phase separation to AF order. For a moderate lattice height, the coexistence of the Mott and AF phases is possible for the Rb atoms whereas the K atoms remain in the AF-superfluid phase. This observation may provide an experimentally feasible route to hitherto unobserved AF order for {sup 87}Rb-{sup 41}K mixtures.

• OSTI ID: 21456976
• Journal Information: Physical Review. A, Vol. 82, Issue 4; Other Information: DOI: 10.1103/PhysRevA.82.041603; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
74 ATOMIC AND MOLECULAR PHYSICS
ANTIFERROMAGNETISM
APPROXIMATIONS
ATOMS
CONFINEMENT
GROUND STATES
MEAN-FIELD THEORY
MIXTURES
POTASSIUM
POTASSIUM 41
RUBIDIUM
RUBIDIUM 87
SUPERFLUIDITY
ALKALI METALS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALCULATION METHODS
DISPERSIONS
ELEMENTS
ENERGY LEVELS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MAGNETISM
METALS
NUCLEI
ODD-EVEN NUCLEI
POTASSIUM ISOTOPES
RADIOISOTOPES
RUBIDIUM ISOTOPES
STABLE ISOTOPES
YEARS LIVING RADIOISOTOPES