Probing quantum spin liquids with a quantum twisting microscope

Abstract

The experimental characterization of quantum spin liquids poses significant challenges due to the absence of long-range magnetic order, even at absolute zero temperature. The identification of these states of matter often relies on the analysis of their excitations. In this paper, we propose a method for detecting the signatures of the fractionalized excitations in quantum spin liquids using a tunneling spectroscopy setup. Inspired by the recent development of the quantum twisting microscope, we consider a planar tunneling junction, in which a candidate quantum spin liquid material is placed between two graphene layers. By tuning the relative twist angle and voltage bias between the leads, we can extract the dynamical spin structure factor of the tunneling barrier with momentum and energy resolution. Our proposal presents a promising tool for experimentally characterizing quantum spin liquids in two-dimensional materials.

arXiv comment18 pages, 3 figures

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• Microscopic Mechanism of Anyon Superconductivity Emerging from Fractional Chern Insulators
• Probing magnetism in moiré heterostructures with quantum twisting microscopes
• Theory of phonon spectroscopy with the quantum twisting microscope
• Single-particle spectral function of fractional quantum anomalous Hall states
• Revealing spinons by proximity effect
• Emergence of Spinon Fermi Arcs in the Weyl-Mott Metal-Insulator Transition
• Momentum-resolved spectroscopy of superconductivity with the quantum twisting microscope
• Hamiltonian-learning quantum magnets with non-local impurity tomography
• A primer on Kitaev Model: Basic aspects, material realization, and recent experiments
• Encapsulation epitaxy of air-stable monolayer superconducting films for quantum circuits and qubits
• Majorana Signatures in Planar Tunneling through a Kitaev Spin Liquid