Van Hove tuning of Fermi surface instabilities through compensated metallicity

被引：1

作者：

Hohmann, Hendrik ^{[1
,2
]}

Duerrnagel, Matteo ^{[1
,2
,3
]}

Bunney, Matthew ^{[4
,5
]}

Enzner, Stefan ^{[1
,2
]}

Schwemmer, Tilman ^{[1
]}

Neupert, Titus ^{[6
]}

Sangiovanni, Giorgio ^{[1
,2
]}

Rachel, Stephan ^{[2
,4
]}

Thomale, Ronny ^{[1
,2
]}

机构：

[1] Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany

[2] Wurzburg Dresden Cluster Excellence Ctqmat, Wurzburg, Germany

[3] Swiss Fed Inst Technol, Inst Theoret Phys, CH-8093 Zurich, Switzerland

[4] Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia

[5] Rhein Westfal TH Aachen, Inst Theoret Solid State Phys, D-52062 Aachen, Germany

[6] Univ Zurich, Dept Phys, Winterthurerstr 190, Zurich, Switzerland

来源：

PHYSICAL REVIEW B | 2025年 / 111卷 / 12期

关键词：

SUPERCONDUCTIVITY; ENERGY;

D O I：

10.1103/PhysRevB.111.L121105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Van-Hove (vH) singularities in the vicinity of the Fermi level facilitate the emergence of electronically mediated Fermi surface instabilities. This is because they provide a momentum-localized enhancement of density of states promoting selective electronic scattering channels. High-temperature topological superconductivity has been argued for in graphene at vH filling which, however, has so far proven inaccessible due to the demanded large doping from pristine half filling. We propose compensated metallicity as a path to unlock vH-driven pairing close to half filling in an electronic honeycomb lattice model. Enabled by an emergent multipocket fermiology, charge compensation is realized by strong breaking of chiral symmetry from intrasublattice hybridization, while retaining vH dominated physics at the Fermi level. We conclude by proposing tangible realizations through quantum material design.

引用

页数：6

共 63 条

[1] Germanene: the germanium analogue of graphene [J].