We study the collapse of ultracold fermionic gases into inhomogeneous states due to strong dipolar interaction in both two-dimensions (2D) and three-dimensions (3D). Depending on the dimensionality, we find that two different types of inhomogeneous states are stabilized once the dipole moment reaches a critical value d> dc: the stripe phase and phase separation between high and low densities. In 2D, we prove that the stripe phase is always favored for d≳dc, regardless of the microscopic details of the system. In 3D, the one-loop perturbative calculation suggests that the same type of instability leads to phase separation. Experimental detection and finite-temperature effects are discussed. © 2010 The American Physical Society.
CITATION STYLE
Sun, K., Wu, C., & Das Sarma, S. (2010). Spontaneous inhomogeneous phases in ultracold dipolar Fermi gases. Physical Review B - Condensed Matter and Materials Physics, 82(7). https://doi.org/10.1103/PhysRevB.82.075105
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