Ultrafast dynamics in the Lifshitz-type 5$d$ pyrochlore antiferromagnet Cd${}_2$Os${}_2$O${}_7$

Abstract

We investigate the ultrafast dynamics of Cd${}_2$Os${}_2$O${}_7$, a prototype material showing a Lifshitz-type transition as a function of temperature. In the paramagnetic metallic state, the photo-reflectivity shows a sub-picosecond relaxation, followed by a featureless small offset. In the antiferromagnetic state slightly below $T_N$, however, the photo-reflectivity resurges over hundreds of picoseconds, which goes beyond the usual realm of the effective-temperature model. Our observations are consistent with the Lifshitz phase transition of Cd${}_2$Os${}_2$O${}_7$ driven by the evolution of the local magnetic moment.

References in corpus (26)

• Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach
• Electronic Evidence of Temperature-Induced Lifshitz Transition and Topological Nature in ZrTe5
• Temperature induced Lifshitz transition in WTe2
• Tracking Cooper Pairs in a Cuprate Superconductor by Ultrafast Angle-Resolved Photoemission
• Ultrafast transient generation of spin-densitywave order in the normal state of BaFe2As2 driven by coherent lattice vibrations
• Kinetics of a superconductor excited with a femtosecond optical pulse
• Tetrahedral Magnetic Order and the Metal-Insulator Transition in the Pyrochlore Lattice of Cd2Os2O7
• Topological Lifshitz transitions
• Enhanced superconductivity accompanying a Lifshitz transition in electron-doped FeSe monolayer
• Emergent excitation at the magnetic metal-insulator transition in the pyrochlore osmate Cd2Os2O7
• Ultrafast observation of critical nematic fluctuations and giant magnetoelastic coupling in iron pnictides
• Noncollinear magnetism and spin-orbit coupling in 5d pyrochlore oxide Cd2Os2O7
• Magnetic state of pyrochlore Cd2Os2O7 emerging from strong competition of ligand distortions and longer-range crystalline anisotropy
• Dynamical Mean Field Theory of the Antiferromagnetic Metal to Antiferromagnetic Insulator Transition
• Searching for the Slater Transition in the Pyrochlore Cd${}_2$Os${}_2$O${}_7$ with Infrared Spectroscopy
• A charge density wave-like instability in a doped spin-orbit-assisted weak Mott insulator
• Superconductivity across Lifshitz transition and anomalous insulating state in surface K-dosed (Li0.8Fe0.2OH)FeSe
• All-in/all-out magnetic domains: X-ray diffraction imaging and magnetic field control
• Lifshitz transition driven by spin fluctuations and spin-orbit renormalization in NaOsO${}_3$
• Direct characterization of photo-induced lattice dynamics in BaFe2As2
• Correlation-driven Lifshitz transition at the emergence of the pseudogap phase in the two-dimensional Hubbard model
• Lifshitz transition from valence fluctuations in YbAl3
• Low-energy interband transitions in the infrared response of Ba(Fe1-xCox)2As2
• Coexistence of ferromagnetism and superconductivity in iron based pnictides: a time resolved magnetooptical study
• Abnormal $phase$ flip in coherent phonon oscillations of Ca${}_2$RuO${}_4$
• Transient differential reflectivity of ferromagnetic and paramagnetic phases in the bilayered manganite La1.24Sr1.76Mn2O7

Cited by in corpus (1)

• Pyrochlore Oxide Hg2Os2O7 on Verge of Metal-Insulator Boundary