Anomalous nuclear magnetic resonance spectra in Bi${}_2$Se${}_3$ nanowires

Abstract

We report ${}^{209}$Bi nuclear magnetic resonance (NMR) spectra of in nanowires and single crystals of Bi${}_2$Se${}_3$. Crystals were powdered to simulate the random orientation of the nanowires, and the spectra are compared with theoretical expectations derived via an orientational study of a single crystal. The nanowire spectra are consistent with the randomly oriented powders, however we find an unusual suppression of signal intensity as a function of field orientation that may be associated with screening by surface currents.

7 pages, 8 figures, to appear in Phys. Rev. B

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• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Coexistence of the topological state and a two-dimensional electron gas on the surface of Bi2Se3
• Strong surface scattering in ultrahigh mobility Bi2Se3 topological insulator crystals
• Singular robust room-temperature spin response from topological Dirac fermions
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Cited by in corpus (5)

• Nanoscale $\beta$-Nuclear Magnetic Resonance Depth Imaging of Topological Insulators
• Unusual ${}^{209}$Bi NMR quadrupole effects in topological insulator Bi${}_2$Se${}_3$
• NMR in an electric field: A bulk probe of the hidden spin and orbital polarizations
• Field induced charge symmetry in topological insulator Bi${}_2$Te${}_3$ revealed by nuclear magnetic resonance
• Resistively detected NMR as a probe of the topological nature of conducting edge/surface states