Theory of the Nuclear Magnetic 1/T1 Relaxation Rate in Conventional and Unconventional Magnets

One of the best ways to lift the lid on what is happening inside a given material is to study it using nuclear magnetic resonance (NMR). Of particular interest are NMR 1/T1 relaxation rates which measure how fast energy stored in magnetic nuclei is transferred to surrounding electrons. <br>��<br>This thesis develops a detailed quantitative theory of NMR 1/T1 relaxation rates and shows for the first time how they could be used to measure the speed at which energy travels in a wide range of magnetic materials.<br>��<br>This theory is used to make predictions forQuantum Spin Nematics an exotic form of quantum order analogous to a liquid crystal.�� In order to do so it is first necessary to unravel how spin nematics transport energy. This thesis proposes a new way to do this based on the description of quarks in high-energy physics. <br>��<br>Experiments to test the ideas presented are now underway in laboratories across the world.