Multi-modal spectroscopy of order parameter distributions

Abstract

We present a multi-modal spectroscopic paradigm that enables independent measurement of charge and spin degrees of freedom (DOF) in strongly correlated materials. This spin-based technique probes symmetry-specific Hamiltonian parameters by analyzing how the time delay between applied pulses ($\tau$) affects the response. We demonstrate ways in which charge DOF that couple through the quadrupolar interaction (inversion symmetric) can be independently measured even in the presence of large magnetic noise (inversion asymmetric). The method quantifies both the strength of the interactions and its distribution (noise). We provide protocols to directly and independently measure the distribution of interaction strengths, even when the average value of the interaction is zero. By independently measuring distributions of different forms of disorder, this methodology can elucidate which microscopic symmetry drives a phase transition. We discuss potential applications to study complex phase transitions in strongly interacting quantum materials.

14 pages, 6 figures

References in corpus (7)

• Definitive Evidence for Order-by-Quantum-Disorder in Er2Ti2O7
• Multi-spin dynamics of the solid-state NMR Free Induction Decay
• Hexadecapolar colloids
• Ferro-octupolar order and low-energy excitations in d${}^2$ double perovskites of Osmium
• Two-dimensional spectroscopy for the study of ion Coulomb crystals
• Resonant X-ray scattering investigation of the multipolar ordering in Ca3Co2O6
• ${}^{133}$Cs NMR investigation of 2D frustrated Heisenberg antiferromagnet, Cs${}_2$CuCl${}_4$