Ultracold Fermionic Feshbach Molecules of ${}^{23}$Na${}^{40}$K

Abstract

We report on the formation of ultracold fermionic Feshbach molecules of ${}^{23}$Na${}^{40}$K, the first fermionic molecule that is chemically stable in its ground state. The lifetime of the nearly degenerate molecular gas exceeds 100 ms in the vicinity of the Feshbach resonance. The measured dependence of the molecular binding energy on the magnetic field demonstrates the open-channel character of the molecules over a wide field range and implies significant singlet admixture. This will enable efficient transfer into the singlet vibrational ground state, resulting in a stable molecular Fermi gas with strong dipolar interactions.

5 pages, 4 figures

References in corpus (9)

• A High Phase-Space-Density Gas of Polar Molecules
• Observation of Bose-Einstein Condensation of Molecules
• Ultracold heteronuclear molecules in a 3D optical lattice
• Reactions of ultracold alkali metal dimers
• Ultracold Heteronuclear Fermi-Fermi Molecules
• Collisional stability of fermionic Feshbach molecules
• Heteronuclear molecules in an optical dipole trap
• Radio-Frequency Transitions on Weakly-Bound Ultracold Molecules
• Suppression of molecular decay in ultracold gases without Fermi statistics

Cited by in corpus (26)

• Ultracold Dipolar Gas of Fermionic ${}^{23}$Na${}^{40}$K Molecules in their Absolute Ground State
• Variational study of polarons in Bose-Einstein condensates
• Formation of Ultracold NaRb Feshbach Molecules
• Quantum Monte Carlo Study of a Resonant Bose-Fermi Mixture
• Induced interactions in a superfluid Bose-Fermi mixture
• Weyl Superfluidity in a Three-dimensional Dipolar Fermi Gas
• Bloch oscillations of bosonic lattice polarons
• Ultracold chemistry with alkali-metal-rare-earth molecules
• Universality of weakly bound dimers and Efimov trimers close to Li-Cs Feshbach resonances
• Efimov States of Heavy Impurities in a Bose-Einstein Condensate
• Condensed phase of Bose-Fermi mixtures with a pairing interaction
• Feshbach resonances, molecular bound states and prospects of ultracold molecule formation in mixtures of ultracold K and Cs
• Fixed-node diffusion Monte Carlo study of the BCS-BEC crossover in a bilayer system of fermionic dipoles
• Properties of the density-wave phase of a two-dimensional dipolar Fermi gas
• Unconventional Spin Density Waves in Dipolar Fermi Gases
• Density-wave phases of dipolar fermions in a bilayer
• Spontaneous time-reversal symmetry breaking for spinless fermions on a triangular lattice
• Coexistence of density wave and superfluid order in a dipolar Fermi gas
• Unconventional symmetries of Fermi liquid and Cooper pairing properties with electric and magnetic dipolar fermions
• Structural transitions of nearly second order in classical dipolar gases
• Second-order interaction corrections to the Fermi surface and the quasiparticle properties of dipolar fermions in three dimensions
• Feshbach molecule formation through an oscillating magnetic field: subharmonic resonances
• A local exchange theory for trapped dipolar gases
• Energy of strongly attractive Bose-Fermi mixtures
• A toy model for the dipolar-induced resonance in quasi-one-dimensional systems
• Quantum phases of hard-core dipolar bosons in coupled 1D optical lattices