Superconductivity in Uniquely Strained RuO${}_2$ Films

Abstract

We report strain engineering of superconductivity in RuO${}_2$ singlecrystalline films, which are epitaxially grown on rutile TiO${}_2$ and MgF${}_2$ substrates with various crystal orientations. Systematic mappings between the superconducting transition temperature and the lattice parameters reveal that shortening of specific ruthenium-oxygen bonds is a common feature among the superconducting RuO${}_2$ films. Ab initio calculations of electronic and phononic structures for the strained RuO${}_2$ films suggest the importance of soft phonon modes for emergence of the superconductivity. The findings indicate that simple transition metal oxides such as with the rutile structure may be suitable for further exploring superconductivity by controlling phonon modes through the epitaxial strain.

13 pages, 4 figures + supplementary 3 pages, 3 figures

References in corpus (11)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Advanced capabilities for materials modelling with Quantum ESPRESSO
• Itinerant Antiferromagnetism in RuO${}_2$
• First-Order Superconducting Transition of Sr2RuO4
• Enhanced Superconductivity in TiO Epitaxial Thin Films
• Giant Phonon Softening and Enhancement of Superconductivity by Phosphorus Doping of BaNi2As2
• Superconductivity in SnO: a Nonmagnetic Analog to Fe-based Superconductors?
• Molecular beam epitaxy growth of superconducting Sr2RuO4 films
• Field-direction control of the type of charge carriers in nonsymmorphic IrO2
• Anomalous Enhancement of Upper Critical Field in Sr2RuO4 Thin Films
• Characterization of Sr2RuO4 Josephson junctions made of epitaxial films

Cited by in corpus (31)

• Observation of spin splitting torque in a collinear antiferromagnet RuO2
• Tilted spin current generated by the collinear antiferromagnet RuO2
• Observation of spin-splitter torque in collinear antiferromagnetic RuO${}_2$
• Finite-momentum Cooper pairing in proximitized altermagnets
• 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
• Fragility of the magnetic order in the prototypical altermagnet RuO${}_2$
• Superconducting phenomena in systems with unconventional magnets
• Unconventional p-wave and finite-momentum superconductivity induced by altermagnetism through the formation of Bogoliubov Fermi surface
• Fermi-liquid behavior of non-altermagnetic RuO${}_2$
• Coulomb Drag in Altermagnets
• Crystal structure and absence of magnetic order in single crystalline RuO${}_2$
• Solid Source Metal-Organic Molecular Beam Epitaxy of Epitaxial RuO2
• Pair Density Waves and Supercurrent Diode Effect in Altermagnets
• Multiband transport in RuO${}_2$
• Strain-induced orbital energy shift in antiferromagnetic RuO2 revealed by resonant elastic x-ray scattering
• Superconductivity of anomalous pseudospin
• Symmetry-breaking induced surface magnetization in non-magnetic RuO${}_2$
• Unconventional superconductivity of an altermagnetic metal: Polarized BCS and inhomogeneous Fulde-Ferrell-Larkin-Ovchinnikov states
• Emergent superconductivity in doped ferroelectric hafnia
• Exploration of Altermagnetism in $\mathrm{Ru}{\mathrm{O}}_2$
• Ferromagnetic state with large magnetic moments realized in epitaxially strained Sr3Ru2O7 films
• Altermagnetism, ARPES, symmetry, non-relativistic band splitting
• Surface-Localized Magnetic Order in RuO2 Thin Films Revealed by Low-Energy Muon Probes
• Growth of ultra-clean single crystals of RuO2
• Inherent momentum-dependent gap structure of altermagnetic superconductors
• Lattice dynamics of altermagnetic ruthenium oxide RuO${}_2$
• Absence of magnetic order in epitaxial RuO2 revealed by X-ray linear dichroism
• Superconductivity in Shear Strained Semiconductors
• Fermi-liquid behavior and characteristic temperature-dependent susceptibility in clean RuO${}_2$ crystal