Effects of intra-layer correlations on electron-hole double-layer superfluidity

التفاصيل البيبلوغرافية
العنوان: Effects of intra-layer correlations on electron-hole double-layer superfluidity
المؤلفون: Pascucci, Filippo, Conti, Sara, Perali, Andrea, Tempere, Jacques, Neilson, David
سنة النشر: 2023
المجموعة: Condensed Matter
مصطلحات موضوعية: Condensed Matter - Superconductivity
الوصف: We investigate the correlations acting within the layers in a superfluid system of electron-hole spatially separated layers. In this system of quasi-dipoles, the dominant correlations are Hartree--Fock. We find in the BEC regime of the superfluid where screening is negligible, that the effect of the correlations on superfluid properties is also negligible. However, in the BCS-BEC crossover regime, where the screening plays a crucial role, we find that the superfluid gap is significantly weakened because the correlations significantly boost the number of low-energy particle-hole excitations participating in the screening process. Finally, the intralayer correlations are found in this system to suppress a predicted phenomenon in which the average pair size passes through a minimum as the crossover regime is traversed. In the presence of intralayer correlations, the minimum is either extremely weak or completely absent.
نوع الوثيقة: Working Paper
DOI: 10.1103/PhysRevB.109.094512
URL الوصول: http://arxiv.org/abs/2310.12117
رقم الأكسشن: edsarx.2310.12117
قاعدة البيانات: arXiv
الوصف
DOI:10.1103/PhysRevB.109.094512