Charged bosons made of fermions in a solid state system without Cooper pairing
Abstract
We report experimental evidence for charged boson states in a solid without Cooper pairing, based on attaching two free carriers to an exciton in a semiconducting system. Theoretical calculations show that this type of complex is stable in bilayer systems next to a parallel metal layer. Our experimental measurements on structures made using two different materials show a new spectral line at the predicted energy, if and only if all the required conditions for this complex are fulfilled, including a parallel metal layer that significantly screens the repulsive interaction between the like-charge carriers, and with the predicted dependence on the distance to the metal layer. This suggests a new path for pursuing room temperature superconductivity without Cooper pairing.
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Cite
@article{arxiv.2003.05850,
title = {Charged bosons made of fermions in a solid state system without Cooper pairing},
author = {Z. Sun and J. Beaumariage and Q. Wan and H. Alnatah and N. Hougland and J. Chisholm and Q. Cao and K. Watanabe and T. Taniguchi and B. Hunt and I. V. Bondarev and D. W. Snoke},
journal= {arXiv preprint arXiv:2003.05850},
year = {2021}
}