Abstract
Many unconventional superconductors, such as cuprates and iron-based materials, display spin-glass states in the underdoped regime, which usually coexist and/or compete with unconventional superconductivity. Here, we performed zero-field (ZF) and longitudinal-field (LF) muon spin-rotation experiments (μSR) on quasi-one-dimensional KCr3As3. Our ZF μSR measurements reveal a large decrease (about 1/3) in the initial asymmetry below 10 K, indicating the presence of a magnetic phase transition. The analysis of the LF μSR results illustrates this transition at the same temperature, and points it to a spin-glassy state. These results would, potentially, confirm unconventional superconductivity in K-Cr-As and related compounds.
| Original language | English |
|---|---|
| Article number | 174401 |
| Journal | Physical Review B |
| Volume | 99 |
| Issue number | 17 |
| DOIs | |
| State | Published - May 1 2019 |
| Externally published | Yes |
Funding
We thank Jinke Bao and Guanghan Cao for helpful discussions. This work was supported by the Innovation Program of Shanghai Municipal Education Commission (Grant No. 2017-01-07-00-07-E00018), the Ministry of Science and Technology of China (Program 973: 2015CB921302), and the National Key R&D Program of the MOST of China (Grant No. 2016YFA0300203). D.T.A. and A.D.H. would like to thank CMPC-STFC, Grant No. CMPC-09108, for financial support. D.T.A. would like to thank the Royal Society of London for the UK-China Newton mobility funding.
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