A monolayer of jacutingaite (Pt2HgSe3) has recently been identified as a novel quantum spin Hall insulator. By first-principles calculations, we study its Fermiology in the doped regime and unveil a type-I and type-II van Hove singularity for hole and electron doping, respectively. We find that the common link between the propensity for a topological band gap at pristine filling and unconventional superconductivity at finite doping is rooted in the longer-ranged hybridization integrals on the honeycomb lattice. In a combined effort of random phase approximation and functional renormalization group, we find chiral d-wave order for the type-I and odd-parity f-wave order for the type-II regime. When longer-ranged Coulomb interaction is included, a propensity of the type-II regime towards a topological px+ipy-wave order emerges.
Description
Unconventional superconductivity in a doped quantum spin hall insulator
%0 Journal Article
%1 PhysRevB.100.041117
%A Wu, Xianxin
%A Fink, Mario
%A Hanke, Werner
%A Thomale, Ronny
%A Di Sante, Domenico
%D 2019
%I American Physical Society
%J Phys. Rev. B
%K a
%N 4
%P 041117
%R 10.1103/PhysRevB.100.041117
%T Unconventional superconductivity in a doped quantum spin hall insulator
%U https://link.aps.org/doi/10.1103/PhysRevB.100.041117
%V 100
%X A monolayer of jacutingaite (Pt2HgSe3) has recently been identified as a novel quantum spin Hall insulator. By first-principles calculations, we study its Fermiology in the doped regime and unveil a type-I and type-II van Hove singularity for hole and electron doping, respectively. We find that the common link between the propensity for a topological band gap at pristine filling and unconventional superconductivity at finite doping is rooted in the longer-ranged hybridization integrals on the honeycomb lattice. In a combined effort of random phase approximation and functional renormalization group, we find chiral d-wave order for the type-I and odd-parity f-wave order for the type-II regime. When longer-ranged Coulomb interaction is included, a propensity of the type-II regime towards a topological px+ipy-wave order emerges.
@article{PhysRevB.100.041117,
abstract = {A monolayer of jacutingaite (Pt2HgSe3) has recently been identified as a novel quantum spin Hall insulator. By first-principles calculations, we study its Fermiology in the doped regime and unveil a type-I and type-II van Hove singularity for hole and electron doping, respectively. We find that the common link between the propensity for a topological band gap at pristine filling and unconventional superconductivity at finite doping is rooted in the longer-ranged hybridization integrals on the honeycomb lattice. In a combined effort of random phase approximation and functional renormalization group, we find chiral d-wave order for the type-I and odd-parity f-wave order for the type-II regime. When longer-ranged Coulomb interaction is included, a propensity of the type-II regime towards a topological px+ipy-wave order emerges.},
added-at = {2023-04-25T14:17:29.000+0200},
author = {Wu, Xianxin and Fink, Mario and Hanke, Werner and Thomale, Ronny and Di Sante, Domenico},
biburl = {https://www.bibsonomy.org/bibtex/289e5f73511c027a896f87bc409e952bf/ctqmat},
day = 31,
description = {Unconventional superconductivity in a doped quantum spin hall insulator},
doi = {10.1103/PhysRevB.100.041117},
interhash = {e748368b01d3f6469ed943a4f5ee8f21},
intrahash = {89e5f73511c027a896f87bc409e952bf},
journal = {Phys. Rev. B},
keywords = {a},
month = {07},
number = 4,
numpages = {5},
pages = 041117,
publisher = {American Physical Society},
timestamp = {2023-04-25T14:17:29.000+0200},
title = {Unconventional superconductivity in a doped quantum spin hall insulator},
url = {https://link.aps.org/doi/10.1103/PhysRevB.100.041117},
volume = 100,
year = 2019
}