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Evidence for a nematic phase in La$ {1.75}$Sr$ {0.25}$NiO$ {4}$ by Zhong, Ruidan; Winn, Barry L.; Gu, Genda; Reznik, Dmitry; Tranquada, J. M. is a scholarly article available to read on EtoBox.

What is Evidence for a nematic phase in La$ {1.75}$Sr$ {0.25}$NiO$ {4}$ about?

Determining the nature of electronic states in doped Mott insulators remains a challenging task. In the case of tetragonal La$_{2-x}$Sr$_{x}$NiO$_{4}$, the occurrence of diagonal charge and spin stripe order in the ground state is now well established. In contrast, the nature of the high-temperature "disordered" state from which the stripe order develops has long been a subject of controversy, with considerable speculation regarding a polaronic liquid. Following on the recent detection of dynamic charge stripes, we use neutron scattering measurements on an $x=0.25$ crystal to demonstrate that the dispersion of the charge stripe excitations is anisotropic. This observation provides compelling evidence for the presence of electronic nematic order.

Author

Zhong, Ruidan; Winn, Barry L.; Gu, Genda; Reznik, Dmitry; Tranquada, J. M.

Published

2016

Language

EN