Emergent topological phenomena in thin films of pyrochlore iridates

Abstract

Two quintessential ingredients governing the topological invariant of a system are the dimensionality and the symmetry of the system. Due to the recent development of thin film and artificial superstructure growth technique, it is possible to control the dimensionality of the system, smoothly between the two-dimensions (2D) and three-dimensions (3D). In this work we unveil the dimensional crossover of emergent topological phenomena in correlated topological materials. In particular, by focusing on the thin film of pyrochlore iridate antiferromagnets grown along the [111] direction, we demonstrate that it can show giant anomalous Hall conductance, which is proportional to the thickness of the film, even though there is no Hall effect in 3D bulk material. In addition, we uncover the emergence of a new topological phase, whose nontrivial topological properties are hidden in the bulk insulator but manifest only in thin films. This shows that the thin film of topological materials is a new platform to search for unexplored novel topological phenomena.

34 pages, 9 figures, 1 table

References in corpus (9)

• Classification of topological insulators and superconductors in three spatial dimensions
• Topological Field Theory of Time-Reversal Invariant Insulators
• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• Three dimensional topological invariants for time reversal invariant Hamiltonians and the three dimensional quantum spin Hall effect
• Topological response in Weyl semimetals and the chiral anomaly
• Scalar spin chirality and quantum Hall effect on a triangular lattice
• Flat bands with higher Chern number in pyrochlore slabs
• Pyrochlore electrons under pressure, heat and field: shedding light on the iridates
• Topological phases in layered pyrochlore oxide thin films along the [111] direction

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• Topological Crystalline Metal in Orthorhombic Perovskite Iridates
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