Low-Temperature Charge Density Waves in Fe Compounds

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Materials Science

Strongly Correlated Electrons

Low-Temperature Charge Density Waves in Fe Compounds

A catastrophic charge density wave in BaFe$_2$Al$_9$

We report an unusual example of a charge density wave (cdw) in below 100\,k.

Temperature dependent physical properties of single crystals reveal a first-order phase transition accompanied by a discontinuous change in the size of the crystal lattice.

This is accompanied by a discontinuous change in the strain on the crystals causing them to physically shatter.

Single crystal x-ray diffraction reveals super-lattice peaks in the low-temperature phase signaling the development of a charge density wave lattice modulation.

Authors

William R. Meier, Bryan C. Chakoumakos, Satoshi Okamoto, Michael A. McGuire, Raphaël P. Hermann, German D. Samolyuk, Shang Gao, Qiang Zhang, Matthew B. Stone, Andrew D. Christianson, Brian C. Sales

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