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Updated: Dec 25, 2025

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Spectroscopy of Spinons in Coulomb Quantum Spin Liquids
Siddhardh C Morampudi1, Frank Wilczek2,3,4,5,6, Chris R Laumann1
1Department of Physics, Boston University, Boston, Massachusetts 02215, USA.
Abstract:
We calculate the effect of the emergent photon on threshold production of spinons in U(1) Coulomb spin liquids such as quantum spin ice. The emergent Coulomb interaction modifies the threshold production cross-section dramatically, changing the weak turn-on expected from the density of states to an abrupt onset reflecting the basic coupling parameters. The slow photon typical in existing lattice models and materials suppresses the intensity at finite momentum and allows profuse Cerenkov radiation beyond a critical momentum. These features are broadly consistent with recent numerical and experimental results.
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