Odd-parity magnetoresistance in pyrochlore iridate thin films with broken time-reversal symmetry

Abstract

A new class of materials termed topological insulators have been intensively investigated due to their unique Dirac surface state carrying dissipationless edge spin currents. Recently, it has been theoretically proposed that the three dimensional analogue of this type of band structure, the Weyl Semimetal phase, is materialized in pyrochlore oxides with strong spin-orbit coupling, accompanied by all-in-all-out spin ordering. Here, we report on the fabrication and magnetotransport of Eu2Ir2O7 single crystalline thin films. We reveal that one of the two degenerate all-in-all-out domain structures, which are connected by time-reversal operation, can be selectively formed by the polarity of the cooling magnetic field. Once formed, the domain is robust against an oppositely polarised magnetic field, as evidenced by an unusual odd field dependent term in the magnetoresistance and an anomalous term in the Hall resistance. Our findings pave the way for exploring the predicted novel quantum transport phenomenon at the surfaces/interfaces or magnetic domain walls of pyrochlore iridates.

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Cited by in corpus (41)

• Recent progress on correlated electron systems with strong spin-orbit coupling
• Spin-orbit-entangled electronic phases in 4$d$ and 5$d$ transition-metal compounds
• Topological Magnon Bands and Unconventional Superconductivity in Pyrochlore Iridate Thin Films
• A magnetic Weyl semimetallic phase in thin films of Eu${}_2$Ir${}_2$O${}_7$
• Topological magnons with nodal-line and triple-point degeneracies: Implications for thermal Hall effect in pyrochlore iridates
• Odd-parity linear magnetoresistance and the planar Hall effect
• Epitaxial thin films of pyrochlore iridate Bi_{2+x}Ir_{2-y}O_{7-delta}: structure, defects and transport properties
• Unconventional anomalous Hall effect from antiferromagnetic domain walls of Nd2Ir2O7 thin films
• Perspective: Strongly correlated and topological states in [111] grown transition metal oxide thin films and heterostructures
• All-in-all-out magnetic domain wall conduction in pyrochlore iridate heterointerface
• Anatomy of Topological Surface States: Exact Solutions from Destructive Interference on Frustrated Lattices
• Spin-orbit torque generation in NiFe/IrO2 bilayers
• Topological Properties and Functionalities in Oxide Thin Films and Interfaces
• All-in-all-out magnetic domain size in pyrochlore iridate thin films as probed by local magnetotransport
• Spin Ice Thin Film: Surface Ordering, Partial Magnetic Wetting and Emergent Square Ice
• Robust pinning of magnetic moments in pyrochlore iridates
• Boundaries of boundaries: a systematic approach to lattice models with solvable boundary states of arbitrary codimension
• Spontaneous Hall Effect enhanced by local Ir moments in epitaxial Pr${}_2$Ir${}_2$O${}_7$ thin films
• Geometrical lattice engineering of complex oxide heterostructures: a designer approach to emergent quantum states
• Theory of Multifarious Quantum Phases and Large Anomalous Hall effect in Pyrochlore Iridate Thin Films
• The interplay between structural, magnetic and electronic states in the pyrochlore iridate Eu2Ir2O7
• First-principles studies of spin-orbital physics in pyrochlore oxides
• Evolution of structure and magnetism across the metal-insulator transition in the pyrochlore iridate $($Nd${}_{1-x}$Ca${}_x{)}_2$Ir${}_2$O${}_7$
• Inverted hysteresis and negative remanence in a homogeneous antiferromagnet
• Suppression of long range magnetic ordering and electrical conduction in Y${}_{1.7}$Bi${}_{0.3}$Ir${}_2$O${}_7$ thin film
• Evidence of density waves in single crystalline nanowires of Pyrochlore Iridates
• Role of f-d exchange interaction and Kondo scattering in Nd doped pyrochlore Iridate (Eu1-xNdx)2Ir2O7
• Possible Scale Invariant Linear Magnetoresistance in Pyrochlore Iridates Bi${}_2$Ir${}_2$O${}_7$
• Magnetotransport of single crystal Sm${}_2$Ir${}_2$O${}_7$ across the pressure-induced quantum-critical phase boundary
• Unconventional superconducting diode effects via antisymmetry and antisymmetry breaking
• Electronic properties across metal-insulator transition in β-pyrochlore-type CsW2O6 epitaxial films
• Impact of iso-structural template layer on stabilizing pyrochlore Bi${}_2$Rh${}_2$O${}_7$
• Synthesis of epitaxial magnetic pyrochlore heterojunctions
• Evolution of magnetic and transport properties in Cu doped pyrochlore iridate Eu2(Ir1-xCux)2O7
• Weak antilocalization and localization in Eu${}_2$Ir${}_2$O${}_7$ (111) thin films by reactive solid phase epitaxy
• Metal-insulator transitions in pyrochlore oxides
• Giant gate-controlled odd-parity magnetoresistance in one-dimensional channels with a magnetic proximity effect
• Hall mass and transverse Noether spin currents in noncollinear antiferromagnets
• Odd-parity longitudinal magnetoconductivity in time-reversal symmetry broken materials
• Route to in situ synthesis of epitaxial Pr2Ir2O7 thin films guided by thermodynamic calculations
• Magneto-cubic and magneto-linear dependence observed in an in-plane anomalous Hall magnet