@article{WOS:000655877500001,
 abstract = {The perturbative effects of interactions in two two-dimensional systems
with a single quadratic band touching point have been studied at a
transition point. The effects of interactions have been studied using
the renormalization group (RG) at one-loop level and it is found that at
the transition a repulsive interaction is marginally relevant and an
attractive interaction is marginally irrelevant. We corroborate the
results obtained from the RG calculation by studying a microscopic model
the ground state and Green's functions of which can be obtained exactly.
We find that away from the transition the system displays an instability
towards forming an excitonic condensate.},
 article-number = {195118},
 author = {Shah, Jeet and Mukerjee, Subroto},
 doi = {10.1103/PhysRevB.103.195118},
 eissn = {2469-9969},
 issn = {2469-9950},
 journal = {PHYSICAL REVIEW B},
 month = {MAY 11},
 number = {19},
 title = {Renormalization group study of systems with quadratic band touching},
 unique-id = {WOS:000655877500001},
 volume = {103},
 year = {2021}
}