Random singlet state in Ba5CuIr3O12 single crystals

@article{Volkov2020RandomSS,
  title={Random singlet state in 
Ba5CuIr3O12
 single crystals},
  author={Pavel A. Volkov and C. J. Won and Denis Ivanovich Gorbunov and Jaewook Kim and Mai Ye and Heung-Sik Kim and Jedediah H. Pixley and Sang‐Wook Cheong and Girsh Blumberg},
  journal={Physical Review B},
  year={2020},
  volume={101},
  pages={020406}
}
We study the thermodynamic and high-magnetic-field properties of the magnetic insulator ${\mathrm{Ba}}_{5}{\mathrm{CuIr}}_{3}{\mathrm{O}}_{12}$, which shows no magnetic order down to 2 K, consistent with a spin-liquid ground state. While the temperature dependence of the magnetic susceptibility and the specific heat shows only weak antiferromagnetic correlations, we find that the magnetization does not saturate up to a field of 59 T, leading to an apparent contradiction. We demonstrate that the… 
3 Citations

Figures and Tables from this paper

Phase diagram of the anisotropic triangular lattice Hubbard model
picture: The first type of ordering we consider is shown in Figure S2(a). Evidently, along one lattice vector the spins are ferromagnetically aligned, while along the two other bonds of the
Characterizing random-singlet state in two-dimensional frustrated quantum magnets and implications for the double perovskite Sr$_2$CuTe$_{1-x}$W$_{x}$O$_6$
Motivated by experimental observation of the non-magnetic phase in the compounds with frustration and disorder, we study the ground state of the spin-$1/2$ square-lattice Heisenberg model with
Hexagonal Perovskites as Quantum Materials.
TLDR
Hexagonal oxide perovskites are of contemporary interest due to their potential for geometrical frustration of the ordering of magnetic moments or orbital occupancies at low temperatures, which is especially relevant to their significance as quantum materials.

References

SHOWING 1-10 OF 54 REFERENCES
Exotic Low-Energy Excitations Emergent in the Random Kitaev Magnet Cu_{2}IrO_{3}.
TLDR
A many-faceted impact of quenched disorder in a Kitaev spin system due to its peculiar bond character is marked, pointing towards the presence of additional low-lying excitations on the background of bond-disordered spin liquid.
Rearrangement of Uncorrelated Valence Bonds Evidenced by Low-Energy Spin Excitations in YbMgGaO_{4}.
TLDR
It is argued that such a hierarchy of magnetic excitations may be a universal feature of quantum spin liquids and extend this picture to herbertsmithite, the spin-liquid candidate on the kagome lattice.
Orbital order and fluctuations in Mott insulators
Basic mechanisms controlling orbital order and orbital fluctuations in transition metal oxides are discussed. The lattice driven classical orbital picture, e.g. like in manganites LaMnO$_3$, is
Disorder-Induced Mimicry of a Spin Liquid in YbMgGaO_{4}.
We suggest that a randomization of the pseudodipolar interaction in the spin-orbit-generated low-energy Hamiltonian of YbMgGaO_{4} due to an inhomogeneous charge environment from a natural mixing of
Trimer-based spin liquid candidate Ba4NbIr3O12
Ba4NbIr3O12, a previously unreported material with a triangular planar geometry of Ir3O12 trimers, is described. Magnetic susceptibility measurements show no magnetic ordering down to 1.8 K despite
Valence Bonds in Random Quantum Magnets: Theory and Application to YbMgGaO4
We analyze the effect of quenched disorder on spin-1/2 quantum magnets in which magnetic frustration promotes the formation of local singlets. Our results include a theory for 2D valence-bond solids
Scaling and data collapse from local moments in frustrated disordered quantum spin systems
TLDR
It is shown that recently observed scaling behavior common to several disordered quantum magnets can be understood as the emergence of a universal random-singlet regime.
Static and dynamical spin correlations of the S = 1 2 random-bond antiferromagnetic Heisenberg model on the triangular and kagome lattices
Inspired by the recent theoretical suggestion that the random-bond $S=1/2$ antiferromagnetic Heisenberg model on the triangular and the kagome lattices might exhibit a randomness-induced quantum spin
Randomness-induced quantum spin liquid behavior in the s=12 random J1−J2 Heisenberg antiferromagnet on the square lattice
We investigate the ground-state and finite-temperature properties of the bond-random $s=1/2$ Heisenberg model on a honeycomb lattice with frustrated nearest- and next-nearest-neighbor
Random antiferromagnetic quantum spin chains.
  • Fisher
  • Physics
    Physical review. B, Condensed matter
  • 1994
The properties of spin-1/2 antiferromagnetic chains with various types of random exchange coupling are studied via an asymptotically exact decimation renormalization-group transformation, which is a
...
1
2
3
4
5
...