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Nuclear Magnetic Resonance as a Probe of the Topological Insulator Bi2Se3

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Abstract

Topological insulators are a new class of materials with the ability to carry spin-polarized currents on their surfaces. Nuclear magnetic resonance (NMR) measurements can probe the magnetic interactions between specific isotopes and the electronic system of a material. We present 209Bi NMR spectra and relaxation rate data on single crystals of the topological insulator material Bi2Se3 grown under various conditions. Our NMR data on single crystals reveal a significant strength of coupling between the nuclear spins and the bulk carrier spins, suggesting that nuclear spins may have a sizeable effect on spin-polarized surface currents.

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Acknowledgments

We thank Nicholas ap-Roberts Warren for building the Bridgman furnace used to prepare the samples used in these studies. This material is based upon research supported by the National Science Foundation under Grant No. DMR-1005393 and the Eugene Cota-Robles Fellowship.

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Nisson, D.M., Dioguardi, A.P., Klavins, P. et al. Nuclear Magnetic Resonance as a Probe of the Topological Insulator Bi2Se3. MRS Online Proceedings Library 1691, 25–30 (2014). https://doi.org/10.1557/opl.2014.558

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  • DOI: https://doi.org/10.1557/opl.2014.558

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