Spin dynamics of Mn pyrochlore lattice in YMn2Zn20-xInx

13th International Conference on Muon Spin Rotation, Relaxation and Resonance

Miyazaki, M.^1 ; Kadono, R.^1,2 ; Hiraishi, M.^1 ; Yamauchi, I.^1 ; Koda, A.^1,2 ; Kojima, K.M.^1,2 ; Kawasaki, I.^3 ; Watanabe, I.^3 ; Okamoto, Y.^5 ; Hiroi, Z.^4

Muon Science Laboratory and Condensed Matter Research Center, Institute for Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki

305-0801, Japan^1

Department of Materials Structure Science, Graduate University for Advanced Studies (SOKENDAI), Tsukuba, Ibaraki

305-0801, Japan^2

Advanced Meson Science Laboratory, RIKEN Nishina Center, Wako, Saitama

351-0198, Japan^3

Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba

277-8581, Japan^4

Department of Applied Physics, Nagoya University, Chikusa-ku, Nagoya

464-8603, Japan^5

关键词: Antiferro-magnetic interactions;    Heavy fermion;    Hubbard;    Pyrochlore compounds;    Pyrochlore lattices;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/551/1/012019/pdf
DOI  :  10.1088/1742-6596/551/1/012019

来源: IOP

【 摘 要 】

It is shown in a new class of pyrochlore compound YMn2Zn20-xInx (with x 2.36) that the spin fluctuation rate (v) is proportional to temperature (v T) below T0 ∼10 K where heavy-fermion(HF)-like behavior is observed. Such a linear T dependence, commonly found in Y(Sc)Mn2 and LiV2O4, is expected for intersecting quasi-1D Hubbard chains, suggesting that the quasi-1D character of the t2g band associated with the pyrochlore lattice plays an important role in the emergence of the HF-like state, where T0 may correspond to intra-chain antiferromagnetic interaction energy between Mn spins.