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arXiv · 2312.00754

Measurements of nematic susceptibility with phase sensitive nuclear magnetic resonance in pulsed strain fields

C. Chaffey·C. Williams·M. A. Tanatar·S. L. Bud'ko·P. C. Canfield·N. J. Curro
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Abstract

We present nuclear magnetic resonance data in BaFe$_2$As$_2$ in the presence of pulsed strain fields that are interleaved in time with the radiofrequency excitation pulses. In this approach, the precessing nuclear magnetization acquires a phase shift that is proportional to the strain and pulse time. The sensitivity in this approach is limited by the homogeneous decoherence time, $T_2$, rather than the inhomogeneous linewidth. We measure the nematic susceptibility as a function of temperature, and demonstrate three orders of magnitude improvement in sensitivity. This approach will enable studies of the strain response in a broad range of materials that previously were inaccessible due to inhomogeneous broadening.

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C. Chaffey, C. Williams, M. A. Tanatar, S. L. Bud'ko, P. C. Canfield, N. J. Curro. 2023-12-01. Measurements of nematic susceptibility with phase sensitive nuclear magnetic resonance in pulsed strain fields. https://doi.org/10.1063/5.0190229

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