Nuclear magnetic resonance as a probe of electronic states of Bi2Se3

作者：Nisson D M^*; Dioguardi A P; Klavins P; Lin C H; Shirer K; Shockley A C; Crocker J; Curro N J

来源：Physical Review B, 2013, 87(19): 195202.

DOI：10.1103/PhysRevB.87.195202

We present magnetotransport and Bi-209 nuclear magnetic resonance (NMR) data on a series of single crystals of Bi2Se3, Bi2Te2Se, and Cu x Bi2Se3 with varying carrier concentrations. The Knight shift of the bulk nuclei is strongly correlated with the carrier concentration via a hyperfine coupling of 27 mu eV, which may have important consequences for scattering of the protected surface states. Surprisingly we find that the NMR linewidths and the spin-lattice relaxation rate appear to be dominated by the presence of localized spins, which may be related to the presence of Se vacancies.

• 出版日期2013-5-13