Electric quadrupolar contributions in the magnetic phases of UNi₄B

YANAGISAWA Tatsuya

Department of Physics

Apr. 14, 2021

Press release (in Japanese)

Abstract
We present acoustic signatures of the electric quadrupolar degrees of freedom in the honeycomb-layer compound UNi₄B. The transverse ultrasonic mode C₆₆ shows softening below 30 K both in the paramagnetic phase and antiferromagnetic phases down to ∼0.33 K. Furthermore, we traced magnetic field-temperature phase diagrams up to 30 T and observed a highly anisotropic elastic response within the honeycomb layer. These observations strongly suggest that……

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Article information:
Electric quadrupolar contributions in the magnetic phases of UNi₄B
T. Yanagisawa, H. Matsumori, H. Saito, H. Hidaka, H. Amitsuka, S. Nakamura, S. Awaji, D. I. Gorbunov, S. Zherlitsyn, J. Wosnitza, K. Uhlířová, M. Vališka, and V. Sechovský
Phys. Rev. Lett. 126, 157201
DOI: 10.1103/PhysRevLett.126.157201