TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.18.3.076
TI  - Boson-fermion pairing and condensation in two-dimensional Bose-Fermi mixtures
PY  - 2025/03/03
UR  - https://scipost.org/SciPostPhys.18.3.076
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 18
IS  - 3
SP  - 076
A1  - Pisani, Leonardo
AU  - Bovini, Pietro
AU  - Pavan, Fabrizio
AU  - Pieri, Pierbiagio
AB  - We consider a mixture of bosons and spin-polarized fermions in two dimensions at zero temperature with a tunable Bose-Fermi attraction. By adopting a diagrammatic $T$-matrix approach, we analyze the behavior of several thermodynamic quantities for the two species as a function of the density ratio and coupling strength, including the chemical potentials, the momentum distribution functions, the boson condensate density, and the Tan's contact parameter. By increasing the Bose-Fermi attraction, we find that the condensate is progressively depleted and Bose-Fermi pairs form, with a small fraction of condensed bosons surviving even for strong Bose-Fermi attraction. This small condensate proves sufficient to hybridize molecular and atomic states, producing quasi-particles with unusual Fermi liquid features. A nearly universal behavior of the condensate fraction, the bosonic momentum distribution, and Tan's contact parameter with respect to the density ratio is also found.
ER  -

@Article{10.21468/SciPostPhys.18.3.076,
	title={{Boson-fermion pairing and condensation in two-dimensional Bose-Fermi mixtures}},
	author={Leonardo Pisani and Pietro Bovini and Fabrizio Pavan and Pierbiagio Pieri},
	journal={SciPost Phys.},
	volume={18},
	pages={076},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.18.3.076},
	url={https://scipost.org/10.21468/SciPostPhys.18.3.076},
}