Tripathi, Rajesh;
Adroja, DT;
Ritter, C;
Sharma, Shivani;
Yang, Chongli;
Hillier, AD;
Koza, MM;
... Takabatake, T; + view all
(2022)
Quantum critical spin-liquid-like behavior in S = 1/2 quasi-kagome lattice compound CeRh₁-ₓPdₓSn investigated using muon spin relaxation and neutron scattering.
Physical Review B
, 106
(6)
, Article 064436. 10.1103/PhysRevB.106.064436.
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Abstract
We present the results of muon spin relaxation (μSR) and neutron scattering on the Ce-based quasikagome lattice CeRh1−xPdxSn (x=0.1 to 0.75). Our ZF-μSR results reveal the absence of static long-range magnetic order down to 0.05~K in x=0.1 single crystals. The weak temperature-dependent plateaus of the dynamic spin fluctuations below 0.2~K in ZF-μSR together with its longitudinal-field (LF) dependence between 0 and 3~kG indicate the presence of dynamic spin fluctuations persisting even at T = 0.05~K without static magnetic order. On the other hand, C4f/T increases as --log T on cooling below 0.9~K, passes through a broad maximum at 0.13~K and slightly decreases on further cooling. The ac-susceptibility also exhibits a frequency independent broad peak at 0.16~K, which is prominent with an applied field H along c-direction. We, therefore, argue that such a behavior for x=0.1 (namely, a plateau in spin relaxation rate (λ) below 0.2~K and a linear T dependence in C4f below 0.13~K) can be attributed to a metallic spin-liquid (SL) ground state near the quantum critical point in the frustrated Kondo lattice. The LF-μSR study suggests that the out of kagome plane spin fluctuations are responsible for the SL behavior. Low energy inelastic neutron scattering (INS) of x = 0.1 reveals gapless magnetic excitations, which are also supported by the behavior of C4f proportional to T1.1 down to 0.06~K.
| Type: | Article |
|---|---|
| Title: | Quantum critical spin-liquid-like behavior in S = 1/2 quasi-kagome lattice compound CeRh₁-ₓPdₓSn investigated using muon spin relaxation and neutron scattering |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevB.106.064436 |
| Publisher version: | https://doi.org/10.1103/PhysRevB.106.064436 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For the purpose of open access, the authors have applied a CC BY public copyright license to any Author Accepted Manuscript version arising. |
| Keywords: | Kagome lattice; Valence fluctuation; Quantum phase transition; Antiferromagnetism; Quantum spin-liquid; Muon spin rotation and relaxation |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10153825 |
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