Strain-stabilized superconductivity

Abstract

Superconductivity is among the most fascinating and well-studied quantum states of matter. Despite over 100 years of research, a detailed understanding of how features of the normal-state electronic structure determine superconducting properties has remained elusive. For instance, the ability to deterministically enhance the superconducting transition temperature by design, rather than by serendipity, has been a long sought-after goal in condensed matter physics and materials science, but achieving this objective may require new tools, techniques and approaches. Here, we report the first instance of the transmutation of a normal metal into a superconductor through the application of epitaxial strain. We demonstrate that synthesizing RuO${}_2$ thin films on (110)-oriented TiO${}_2$ substrates enhances the density of states near the Fermi level, which stabilizes superconductivity under strain, and suggests that a promising strategy to create new transition-metal superconductors is to apply judiciously chosen anisotropic strains that redistribute carriers within the low-energy manifold of $d$ orbitals.

30 pages, 20 figures (including supplemental information)

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Cited by in corpus (39)

• Observation of spin splitting torque in a collinear antiferromagnet RuO2
• Tilted spin current generated by the collinear antiferromagnet RuO2
• Nonmagnetic Ground State in RuO${}_2$ Revealed by Muon Spin Rotation
• Absence of altermagnetic spin splitting character in rutile oxide RuO${}_2$
• Minimal Models for Altermagnetism
• Superconducting phenomena in systems with unconventional magnets
• Reconstructing the polar interface of infinite-layer nickelate thin films
• Fermi-liquid behavior of non-altermagnetic RuO${}_2$
• Perspective: strain and strain gradient engineering in membranes of quantum materials
• The origin of insulating and non-ferromagnetic SrRuO3 monolayers
• Pair Density Waves and Supercurrent Diode Effect in Altermagnets
• Solid Source Metal-Organic Molecular Beam Epitaxy of Epitaxial RuO2
• Strain-induced orbital energy shift in antiferromagnetic RuO2 revealed by resonant elastic x-ray scattering
• Strain-induced activation of chiral-phonon emission in monolayer WS${}_2$
• Holographic Supersolids
• Superconductivity of anomalous pseudospin
• Cavity-enhanced superconductivity via band engineering
• Symmetry-breaking induced surface magnetization in non-magnetic RuO${}_2$
• Conditions for orbital selective altermagnetism in Sr${}_2$RuO${}_4$: tight binding model, similarities with cuprates and implications on superconductivity
• Monoclinic LaSb${}_2$ Superconducting Thin Films
• Emergent superconductivity in doped ferroelectric hafnia
• Spin-orbit-coupled superconductivity with spin-singlet non-unitary pairing
• Possible routes to superconductivity in the surface layers of V-doped Mg${}_{1-\delta }$Ti${}_2$O${}_4$ through multiple charge transfers and suppression of Jahn-Teller activity
• Exploration of Altermagnetism in $\mathrm{Ru}{\mathrm{O}}_2$
• Tuning Structural, Transport and Magnetic Properties of Epitaxial SrRuO3 through Ba-Substitution
• Altermagnetism, ARPES, symmetry, non-relativistic band splitting
• Growth of ultra-clean single crystals of RuO2
• Surface-Localized Magnetic Order in RuO2 Thin Films Revealed by Low-Energy Muon Probes
• Observation of mirror-odd and mirror-even spin texture in ultrathin epitaxially strained RuO2 films
• Epitaxial stabilization of an orthorhombic Mg-Ti-O superconductor
• Lattice dynamics of altermagnetic ruthenium oxide RuO${}_2$
• Inherent momentum-dependent gap structure of altermagnetic superconductors
• On valley asymmetry in a topological interaction for quasi-particles
• Single layer clathrane: A potential superconducting two-dimensional (2D) hydrogenated metal borocarbide
• Absence of magnetic order in epitaxial RuO2 revealed by X-ray linear dichroism
• Competing spin-fluctuations in Sr${}_2$RuO${}_4$ and their tuning through epitaxial strain
• Absence of magnetic order and magnetic fluctuations in RuO${}_2$
• Fermi-liquid behavior and characteristic temperature-dependent susceptibility in clean RuO${}_2$ crystal
• Hubbard-$U$-corrected electron-phonon interactions in strongly correlated materials via the finite-displacement method