A Snapshot Review -- Fluctuations in Quantum Materials: From Skyrmions to Superconductivity

Abstract

By measuring a linear response function directly, such as the dynamic susceptibility, one can understand fundamental material properties. However, a fresh perspective can be offered by studying fluctuations. This can be related back to the dynamic susceptibility through the fluctuation-dissipation theorem, which relates the fluctuations in a system to its response, an alternate route to access the physics of a material. Here, we describe a new x-ray tool for material characterization that will offer an opportunity to uncover new physics in quantum materials using this theorem. We provide details of the method and discuss the requisite analysis techniques in order to capitalize on the potential to explore an uncharted region of phase space. This is followed by recent results on a topological chiral magnet, together with a discussion of current work in progress. We provide a perspective on future measurements planned for work in unconventional superconductivity.

References in corpus (8)

• Direct observation of competition between superconductivity and charge density wave order in YBa2Cu3Oy
• Theory of Intertwined Orders in High Temperature Superconductors
• Two Gaps Make a High Temperature Superconductor?
• Distinct Charge Orders in the Planes and Chains of Ortho-III-Ordered YBa${}_2$Cu${}_3$O${}_{6+\delta }$ Superconductors Identified by Resonant Elastic X-ray Scattering
• Tailoring magnetic energies to form dipole skyrmions and skyrmion lattices
• Two energy scales in the spin excitations of the high-T_c superconductor La${}_{2-x}$Sr${}_x$CuO${}_4$
• ${}^{139}$La NMR investigation of the interplay between the lattice, charge, and spin dynamics in charge ordered high $T_c$ cuprate La${}_{1.875}$Ba${}_{0.125}$CuO${}_4$
• Oriented Three-Dimensional Magnetic Biskyrmion in MnNiGa Bulk Crystals

Cited by in corpus (4)

• Charge order at high temperature in cuprate superconductors
• A machine learning photon detection algorithm for coherent X-ray ultrafast fluctuation analysis
• femto-PIXAR: a neural network method for reconstruction of femtosecond X-ray free electron laser pulse energy
• Testing the data framework for an AI algorithm in preparation for high data rate X-ray facilities