High-magnetic-field induced charge order in high-T_c cuprate superconductors

In the last few years, charge order and its entanglement with superconductivity are under hot debate in high-T_c community due to the new progress on charge order in high-T_c cuprate superconductors YBa₂Cu₃O_6+x. Here, we will briefly introduce the experimental status of this field and mainly focus on the experimental progress of high-field nuclear magnetic resonance (NMR) study on charge order in YBa₂Cu₃O_6+x. The pioneering high-field NMR work in YBa₂Cu₃O_6+x sets a new stage for studying charge order which has become a ubiquitous phenomenon in high-T_c cuprate superconductors.