Roderich Moessner is a theoretical physicist at the Max Planck Institute for the Physics of Complex Systems in Dresden, Germany.
His research interests are in condensed matter and materials physics, especially concerning new and topological forms of order, as well as the study of classical and quantum many-body dynamics in and out of equilibrium.
With Claudio Castelnovo and Shivaji L. Sondhi, Roderich Moessner is known for the theoretical proposition of realizing magnetic monopoles as emergent quasiparticles within a condensed matter system known as spin ice.
[2] Other notable results include the theoretical prediction of charge-density wave phases in quantum Hall physics,[3] the identification and theory of a classical spin liquid on the pyrochlore lattice[4] (both with J. T. Chalker); the theoretical discovery of the resonating valence bond liquid phase in the triangular lattice quantum dimer model (with S. L. Sondhi); and the proposal of a new type of spatiotemporal order, the πι-spin glass, now known as discrete time crystal[5] (with V. Khemani, A. Lazarides and S. L. Sondhi), with experimental follow-up work on Google's Sycamore quantum computing platform.
[8] Furthermore, together with Joel E. Moore of the University of California, Berkeley, Moessner has published a book on "Topological Phases of Matter",[9] a textbook for use of advanced undergraduates, graduate students, or active researchers.