Unusual spin pseudogap behavior in the spin web lattice Cu3TeO6 probed by Te-125 nuclear magnetic resonance
- Authors
- Baek, Seung-Ho; Yeo, Hyeon Woo; Park, Jena; Choi, Kwang-Yong; Buechner, Bernd
- Issue Date
- Aug-2021
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW RESEARCH, v.3, no.3
- Journal Title
- PHYSICAL REVIEW RESEARCH
- Volume
- 3
- Number
- 3
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/62256
- DOI
- 10.1103/PhysRevResearch.3.033109
- ISSN
- 2643-1564
2643-1564
- Abstract
- We present a Te-125 nuclear magnetic resonance (NMR) study in the three-dimensional spin web lattice Cu3TeO6 which harbors topological magnons. The Te-125 NMR spectra and the Knight-shift K as a function of temperature show a drastic change at T-S similar to 40 K much lower than the Neel ordering temperature T-N similar to 61 K, providing evidence for the first-order structural phase transition within the magnetically ordered state. Most remarkably, the temperature dependence of the spin-lattice relaxation rate T-1(-1) unravels spin-gap-like magnetic excitations, which sharply sets in at T* similar to 75 K, the temperature well above T-N. The spin-gap behavior may be understood by weakly dispersive optical magnon branches of high-energy spin excitations originating from the unique corner-sharing Cu hexagon spin-1/2 network with low coordination number.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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