- Letter
- Open Access
On the sign of fermion-mediated interactions
Phys. Rev. B 103, L121107 – Published 10 March, 2021
DOI: https://doi.org/10.1103/PhysRevB.103.L121107
Abstract
We develop a unified framework for understanding the sign of fermion-mediated interactions by exploiting the symmetry classification of Green's functions. In particular, we establish a theorem regarding the sign of fermion-mediated interactions in systems with chiral symmetry. The strength of the theorem is demonstrated within multiple examples with an emphasis on electron-mediated interactions in materials.
Physics Subject Headings (PhySH)
Article Text
Supplemental Material
References (37)
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