Back to Search
Start Over
μSR insight into the impurity problem in quantum kagome antiferromagnets.
- Source :
-
Physical Review B . Jul2016, Vol. 94 Issue 2, p1-1. 1p. - Publication Year :
- 2016
-
Abstract
- Impurities, which are unavoidable in real materials, may play an important role in the magnetism of frustrated spin systems with a spin-liquid ground state. We address the impurity issue in quantum kagome antiferromagnets by investigating ZnCu3(OH)6SO4 (Zn-brochantite) by means of muon spin spectroscopy. We show that muons dominantly couple to impurities, originating from Cu-Zn intersite disorder, and that the impurity spins are highly correlated with the kagome spins, allowing us to probe the host kagome physics via a Kondo-like effect. The low-temperature plateau in the impurity susceptibility suggests that the kagome spin-liquid ground state is gapless. The corresponding spin fluctuations exhibit an unconventional spectral density and a nontrivial field dependence. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ANTIFERROMAGNETISM
*QUANTUM spin liquid
*GROUND state (Quantum mechanics)
Subjects
Details
- Language :
- English
- ISSN :
- 24699950
- Volume :
- 94
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Physical Review B
- Publication Type :
- Academic Journal
- Accession number :
- 119449004
- Full Text :
- https://doi.org/10.1103/PhysRevB.94.024438