Theory of multi-orbital topological superconductivity in transition metal dichalcogenides

Gilad Margalit, Erez Berg, Yuval Oreg

Research output: Contribution to journalArticlepeer-review


We study possible superconducting states in transition metal dichalcogenide (TMD) monolayers, assuming an on-site pairing potential that includes both intra- and inter-orbital terms. We find that if the mirror symmetry with respect to the system's plane is broken (e.g., by a substrate), this type of pairing can give rise to unconventional superconductivity, including time-reversal-invariant nodal and fully gapped topological phases. Using a multi-orbital renormalization group procedure, we show how these phases may result from the interplay between the local Coulomb repulsion, Hund's rule coupling, and phonon-mediated attraction. In particular, for a range of interaction parameters, the system transitions from a trivial phase to a nodal phase and finally to a gapped topological phase upon increasing the strength of the mirror symmetry breaking term.
Original languageEnglish
Article number168561
Number of pages18
JournalAnnals of Physics
Issue number2
Early online date4 Jul 2021
StatePublished - Dec 2021


Dive into the research topics of 'Theory of multi-orbital topological superconductivity in transition metal dichalcogenides'. Together they form a unique fingerprint.

Cite this