Current-induced giant diamagnetism in the Mott insulator Ca2RuO4

Abstract

Mott insulators have surprised us many times by hosting new and diverse quantum phenomena when the frozen electrons are perturbed by various stimuli. Superconductivity, metal-insulator transition, and colossal magnetoresistance induced by element substitution, pressure, and magnetic field are prominent examples. Here we report a novel phenomenon, namely giant diamagnetism, in the Mott insulator Ca2RuO4 induced by electric current. With application of 1 A/cm2 current, the strongest diamagnetism among all nonsuperconducting materials is induced as the system is tuned to a semimetallic state. The origin lies in the emergence of indirect Dirac cones in the many-body spectrum and associated monopole-like anomaly in the momentum dependent susceptibility. This record-breaking and switchable diamagnetism is a new class of non-equilibrium quantum phenomena on the verge of Mott insulating states.

14 pages, 4 figures, plus supplementary materials (11 pages, 6 figures)

References in corpus (3)

• A Phenomenological Theory of The Pseudogap State
• Transport Properties and Diamagnetism of Dirac Electrons in Bismuth
• Current driven quantum criticality in itinerant electron ferromagnets

Cited by in corpus (25)

• Floquet Engineering of Quantum Materials
• In-situ strain-tuning of the metal-insulator-transition of Ca${}_2$RuO${}_4$ in angle-resolved photoemission experiments
• Pseudo Jahn-Teller Effect and Magnetoelastic Coupling in Spin-Orbit Mott Insulators
• Observation of spin-orbit excitations and Hund's multiplets in Ca${}_2$RuO${}_4$
• A Unique Crystal Structure of Ca${}_2$RuO${}_4$ in the Current Stabilized Semi-Metallic State
• Spin-Orbital Excitations in Ca${}_2$RuO${}_4$ Revealed by Resonant Inelastic X-ray Scattering
• Nonequilibrium Orbital Transitions via Applied Electrical Current in Calcium Ruthenate
• Emergence of a metallic meta-stable phase induced by electrical current in Ca_2RuO_4
• Raman scattering from current-stabilized nonequilibrium phases in Ca${}_2$RuO${}_4$
• Co-appearance of superconductivity and ferromagnetism in a Ca${}_2$RuO${}_4$ nanofilm crystal
• Polarity dependent heating at the phase interface in metal-insulator transitions
• Control of Magnetic and Topological Orders with a DC Electric Field
• Role of local temperature in the current-driven metal-insulator transition of Ca2RuO4
• Evidence for current-induced phase coexistence in Ca${}_2$RuO${}_4$ and its influence on magnetic order
• Metal-Insulator and Magnetic Phase Diagram of Ca${}_2$RuO${}_4$ from Auxiliary Field Quantum Monte Carlo and Dynamical Mean Field Theory
• Towards Electrical-Current Control of Quantum States in Spin-Orbit-Coupled Matter
• Sr${}_2$RuO${}_4$, like doped cuprates and barium bismuthate, is a negative charge-transfer gap even parity superconductor with $\frac{3}{4}$-filled oxygen band
• Diamagnetic-like response from localised heating of a paramagnetic material
• In situ control of diamagnetism by electric current in Ca${}_3$(Ru${}_{1-x}$Ti${}_x$)${}_2$O${}_7$
• Suppression of effective spin-orbit coupling by thermal fluctuations in spin-orbit coupled antiferromagnets
• Quantum criticality of magnetic catalysis in two-dimensional correlated Dirac fermions
• The Future of the Correlated Electron Problem
• Exotic magnetic anisotropy near digitized dimensional Mott boundary
• Photoemission and Dynamical Mean Field Theory Study of Electronic Correlation in a $t_{2g}^5$ Metal of SrRhO${}_3$ Thin Film
• Superconductor-like effects in an AC driven normal Mott-insulating quantum dot array