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Scientific article
English

Jahn-Teller induced nematic orbital order in tetragonal Sr2VO4

Publication date2016
Abstract

Using high resolution x-ray diffraction (XRD) on high purity powders, we resolved the structure and ab symmetry of the intriguing compound Sr2VO4 from room temperature down to 20 K to an unprecedented level of accuracy. Upon cooling, this set of data unambiguously reveals a second-order phase transition lowering the symmetry from tetragonal to orthorhombic at a temperature Tc2=136 K. The observation of an orthorhombic distortion of the ab plane is attributed to nematic phase formation supported by local Jahn-Teller (JT) dynamical instability. At TN=105 K, spins order and at Tc1=100 K the tetragonal structure is recovered with an elongated c axis.

Citation (ISO format)
TEYSSIER, Jérémie et al. Jahn-Teller induced nematic orbital order in tetragonal Sr<sub>2</sub>VO<sub>4</sub>. In: Physical review. B, Condensed matter and materials physics, 2016, vol. 93, n° 125138. doi: 10.1103/PhysRevB.93.125138
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accessLevelRestricted
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ISSN of the journal1098-0121
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Creation04/04/2016 3:17:00 PM
First validation04/04/2016 3:17:00 PM
Update time03/15/2023 12:14:56 AM
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