Related Experiment Video
Updated: Aug 16, 2026

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Many-body spin Berry phases emerging from the pi-flux state: competition between antiferromagnetism and the
1Computational Materials Science Center, National Institute for Materials Science, Sengen 1-2-1 Tsukuba 305-0047, Japan.
Abstract:
We uncover new topology-related features of the pi-flux saddle-point solution of the D=2+1 Heisenberg antiferromagnet. We note that symmetries of the spinons sustain a built-in competition between antiferromagnetic (AFM) and valence-bond-solid (VBS) orders, the two tendencies central to recent developments on quantum criticality. An effective theory containing an analogue of the Wess-Zumino-Witten term is derived, which generates quantum phases related to AFM monopoles with VBS cores, and reproduces Haldane's hedgehog Berry phases. The theory readily generalizes to pi-flux states for all D.
More Related Videos
09:06Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
07:42Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
Published on: July 20, 2022
Related Concept Videos
Valence Bond Theory
Valence Bond Theory
Atomic Nuclei: Nuclear Spin State Overview
Ferromagnetism
Spin–Spin Coupling: One-Bond Coupling
Atomic Nuclei: Nuclear Relaxation Processes