Summary
Symmetry and symmetry breaking are keys to much of the interesting phenomena in condensed matter physics. Conventional superconductivity, for example, requires both time reversal and inversion symmetry, and the removal of one of these (such as time reversal through a magnetic field) leads to the suppression of the superconducting order. Recently, there is a realization that even if the global symmetry of the system is present, a local symmetry breaking can still induce a variety of fascinating behaviors. On page 1012 of this issue, S. Khim et al. (1) report on field-induced transition within the superconducting state of CeRh2As2 driven by local inversion-symmetry breaking.
