Fermi level tuning and double-dome superconductivity in the kagome metal <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">CsV</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">Sb</mml:mi><mml:mrow><mml:mn>5</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant="normal">Sn</mml:mi><mml:mi>x</mml:mi></mml:msub></mml:math>
Yuzki M. Oey, Brenden R. Ortiz, Farnaz Kaboudvand, Jonathan Frassineti, Erick Garcia, Rong Cong, S. Sanna, V. F. Mitrović, Ram Seshadri, Stephen D. Wilson
Abstract
The recently discovered kagome metal CsV${}_{3}$Sb${}_{5}$ displays a superconducting transition at low temperature accompanied by a charge density wave ordering at higher temperature, among many other interesting features that arise from nested saddle points near the Fermi energy. Through careful hole doping via partial substitution of Sn in the in-plane kagome Sb site, double-dome superconductivity and suppressed charge density wave order were observed. These phenomena can be partially explained by modeling the evolution of electronic band structure and changes in Fermi surface.
Topics & Concepts
SuperconductivityCondensed matter physicsOrder (exchange)PhysicsPhase diagramCharge (physics)Fermi levelMaterials scienceElectronic band structureElectronic structurePhase (matter)ElectronParticle physicsQuantum mechanicsFinanceEconomicsTopological Materials and PhenomenaAdvanced Condensed Matter PhysicsElectronic and Structural Properties of Oxides