6 research outputs found
Site-dependent Local Spin Susceptibility and Low-energy Excitation in a Weyl Semimetal WTe
Site-dependent local spin susceptibility is investigated with Te
nuclear magnetic resonance in a Weyl semimetal WTe. The nuclear
spin-lattice relaxation rate shows a dependence of the square of
temperature at high temperatures, followed by a constant behavior below 50
K. The temperature dependence features Weyl fermions appearing around the
linearly crossing bands. The Knight shift scales to the square root of
, corroborating a predominant spin contribution in low-lying
excitation. The observed dependence of and on the four Te sites
shows the site-dependent electron correlation and density of states. The
angular profile of the NMR spectrum gives the anisotropic hyperfine coupling
tensor, consistent with hole occupations on Te sites.Comment: 6 pages, 5 figure