Real-space observation of emergent complexity of phase evolution in micrometer-sized IrTe${}_2$ crystals

Abstract

We report complex behaviors in the phase evolution of transition-metal dichalcogenide IrTe${}_2$ thin flakes, captured with real-space observations using scanning Raman microscopy. The phase transition progresses via growth of a small number of domains, which is unlikely in statistical models that assume a macroscopic number of nucleation events. Consequently, the degree of phase evolution in the thin flakes is quite variable for the selected specimen and for a repeated measurement sequence, representing the emergence of complexity in the phase evolution. In the $\sim$20-$\mu$m${}^3$-volume specimen, the complex phase evolution results in the emergent coexistence of a superconducting phase that originally requires chemical doping to become thermodynamically stable. These findings indicate that the complexity involved in phase evolution considerably affects the physical properties of a small-sized specimen.

References in corpus (17)

• Magic-angle graphene superlattices: a new platform for unconventional superconductivity
• Raman spectroscopy as probe of nanometer-scale strain variations in graphene
• Topological stability versus thermal agitation in a metastable magnetic skyrmion lattice
• Evolution and Control of Oxygen Order in a Cuprate Superconductor
• Superconductivity Induced by Bond Breaking in the Triangular Lattice of IrTe2
• Dimerization-Induced Cross-Layer Quasi-Two-Dimensionality in Metallic Iridate IrTe2
• Superconductivity in Cu${}_x$IrTe${}_2$ induced by interlayer hybridization
• Direct observation of nanoscale interface phase in the superconducting chalcogenide K${}_x$Fe${}_{2-y}$Se${}_2$ with intrinsic phase separation
• Crystallization and vitrification of electrons in a glass-forming charge liquid
• Superconductivity emerging from a stripe charge order in IrTe2 nanoflakes
• Phase-change memory function of correlated electrons in organic conductors
• Kinetic approach to superconductivity hidden behind a competing order
• Dimerization-Induced Fermi-Surface Reconstruction in IrTe2
• Spatially correlated incommensurate lattice modulations in an atomically thin high-temperature Bi_{2.1}Sr_{1.9}CaCu_{2.0}O_{8+δ} superconductors
• Probing IrTe2 crystal symmetry by polarized Raman scattering
• Intermittent dynamics of antiferromagnetic phase in inhomogeneous iron-based chalcogenide superconductor
• Size effects on supercooling phenomena in strongly correlated electron systems: IrTe${}_2$ and $\theta$-(BEDT-TTF)${}_2$RbZn(SCN)${}_4$

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