Helimagnetic Structure and Heavy-Fermion-Like Behavior in the Vicinity of the Quantum Critical Point in Mn3 P

Hisashi Kotegawa, Masaaki Matsuda, Feng Ye, Yuki Tani, Kohei Uda, Yoshiki Kuwata, Hideki Tou, Eiichi Matsuoka, Hitoshi Sugawara, Takahiro Sakurai, Hitoshi Ohta, Hisatomo Harima, Keiki Takeda, Junichi Hayashi, Shingo Araki, Tatsuo C. Kobayashi

Research output: Contribution to journalArticle

Abstract

Antiferromagnet Mn3P with Neel temperature TN=30 K is composed of Mn tetrahedrons and zigzag chains formed by three inequivalent Mn sites. Due to the nearly frustrated lattice with many short Mn-Mn bonds, competition of the exchange interactions is expected. We here investigate the magnetic structure and physical properties including pressure effect in single crystals of this material, and reveal a complex yet well-ordered helimagnetic structure. The itinerant character of this materials is strong, and the ordered state with small magnetic moments is easily suppressed under pressure, exhibiting a quantum critical point at ∼1.6 GPa. The remarkable mass renormalization, even in the ordered state, and an incoherent-coherent crossover in the low-temperature region, characterize an unusual electronic state in Mn3P, which is most likely effected by the underlying frustration effect.

Original languageEnglish
Article number087202
JournalPhysical Review Letters
Volume124
Issue number8
DOIs
Publication statusPublished - Feb 25 2020

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Kotegawa, H., Matsuda, M., Ye, F., Tani, Y., Uda, K., Kuwata, Y., Tou, H., Matsuoka, E., Sugawara, H., Sakurai, T., Ohta, H., Harima, H., Takeda, K., Hayashi, J., Araki, S., & Kobayashi, T. C. (2020). Helimagnetic Structure and Heavy-Fermion-Like Behavior in the Vicinity of the Quantum Critical Point in Mn3 P. Physical Review Letters, 124(8), [087202]. https://doi.org/10.1103/PhysRevLett.124.087202