TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.14.3.038
TI  - Itinerant ferromagnetism in dilute SU(N) Fermi gases
PY  - 2023/03/17
UR  - https://www.scipost.org/SciPostPhys.14.3.038
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 14
IS  - 3
SP  - 038
A1  - Pera, Jordi
AU  - Casulleras, Joaquim
AU  - Boronat, Jordi
AB  - We present exact analytic results for the energy of a SU(N) repulsive Fermi gas as a function of the spin-channel occupation at second order in the gas parameter. This is an extension of previous results that now incorporates the degree of polarization of the system. Therefore, the magnetic properties of the gas can be obtained, free from numerical uncertainties. For spin 1/2 we find that second-order corrections change the itinerant ferromagnetic transition from continuous to first-order. Instead, for spin larger than 1/2 the phase transition is always of first-order type. The transition critical density reduces when the spin increases, making the phase transition more accessible to experiments with ultracold dilute Fermi gases. Estimations for Fermi gases of Yb and Sr with spin 5/2 and 9/2, respectively, are reported.
ER  -

@Article{10.21468/SciPostPhys.14.3.038,
	title={{Itinerant ferromagnetism in dilute SU(N) Fermi gases}},
	author={Jordi Pera and Joaquim Casulleras and Jordi Boronat},
	journal={SciPost Phys.},
	volume={14},
	pages={038},
	year={2023},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.14.3.038},
	url={https://scipost.org/10.21468/SciPostPhys.14.3.038},
}