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Imaging stress and magnetism at high pressures using a nanoscale quantum sensor.

  • Author(s): Hsieh, S;
  • Bhattacharyya, P;
  • Zu, C;
  • Mittiga, T;
  • Smart, TJ;
  • Machado, F;
  • Kobrin, B;
  • Höhn, TO;
  • Rui, NZ;
  • Kamrani, M;
  • Chatterjee, S;
  • Choi, S;
  • Zaletel, M;
  • Struzhkin, VV;
  • Moore, JE;
  • Levitas, VI;
  • Jeanloz, R;
  • Yao, NY
  • et al.
Abstract

Pressure alters the physical, chemical, and electronic properties of matter. The diamond anvil cell enables tabletop experiments to investigate a diverse landscape of high-pressure phenomena. Here, we introduce and use a nanoscale sensing platform that integrates nitrogen-vacancy (NV) color centers directly into the culet of diamond anvils. We demonstrate the versatility of this platform by performing diffraction-limited imaging of both stress fields and magnetism as a function of pressure and temperature. We quantify all normal and shear stress components and demonstrate vector magnetic field imaging, enabling measurement of the pressure-driven [Formula: see text] phase transition in iron and the complex pressure-temperature phase diagram of gadolinium. A complementary NV-sensing modality using noise spectroscopy enables the characterization of phase transitions even in the absence of static magnetic signatures.

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