The ground state in a proximity to a possible Kitaev spin liquid: An undistorted honeycomb iridate NaxIrO3 (0.60 < x < 0.80)

• URL: http://arxiv.org/abs/2106.04012v1
• Date: Mon, 7 Jun 2021 23:47:15 GMT
• Title: The ground state in a proximity to a possible Kitaev spin liquid: An undistorted honeycomb iridate NaxIrO3 (0.60 < x < 0.80)
• Authors: Hengdi Zhao, Bing Hu, Feng Ye, Minhyea Lee, Pedro Schlottmann and Gang Cao
• Abstract summary: Single-crystal NaxIrO3 adopts a honeycomb lattice noticeably without distortions and stacking disorder. NaxIrO3 is a Mott insulator likely with a predominant pseudospin = 1 state.
• Score: 5.401165680738969
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We report results of our study of a newly synthesized honeycomb iridate NaxIrO3 (0.60 < x < 0.80). Single-crystal NaxIrO3 adopts a honeycomb lattice noticeably without distortions and stacking disorder inherently existent in its sister compound Na2IrO3. The oxidation state of the Ir ion is a mixed valence state resulting from a majority Ir5+(5d4) ion and a minority Ir6+(5d3) ion. NaxIrO3 is a Mott insulator likely with a predominant pseudospin = 1 state. It exhibits an effective moment of 1.1 Bohr Magneton/Ir and a Curie-Weiss temperature of -19 K but with no discernable long-range order above 1 K. The physical behavior below 1 K features two prominent anomalies at Th = 0.9 K and Tl = 0.12 K in both the heat capacity and AC magnetic susceptibility. Intermediate between Th and Tl lies a pronounced temperature linearity of the heat capacity with a large slope of 77 mJ/mole K2, a feature expected for highly correlated metals but not at all for insulators. These results along with comparison drawn with the honeycomb lattices Na2IrO3 and (Na0.2Li0.8)2IrO3 point to an exotic ground state in a proximity to a possible Kitaev spin liquid.

Related papers

• Coherent population trapping and spin relaxation of a silicon vacancy center in diamond at mK temperatures [4.292162781754372]
  Near and below 1 K, phonon-induced spin dephasing becomes negligible compared with that induced by the spin bath of naturally abundant 13C atoms. A nearly 100-fold increase in spin lifetime is observed when the temperature is lowered from 4 K to slightly below 1 K. Two-phonon spin-flip transitions play an essential role in the spin relaxation of SiV ground states.
  arXiv  Detail & Related papers  (2024-09-23T09:49:09Z)
• Analytical Correlation in the H$_{2}$ Molecule from the Independent Atom Ansatz [49.1574468325115]
  The total energy functional correctly dissociates the H-H bond and yields absolute errors of 0.002 $rA$, 0.19 eV, and 13 cm-1$ relative to experiment at the tight binding computational cost. The chemical bond formation is attributed to the Heitler-London resonance of quasi-orthogonal atomic states with no contributions from kinetic energy or charge accumulation in the bond.
  arXiv  Detail & Related papers  (2024-05-20T21:21:42Z)
• Quantum Control of Atom-Ion Charge Exchange via Light-induced Conical Intersections [66.33913750180542]
  Conical intersections are crossing points or lines between two or more adiabatic electronic potential energy surfaces. We predict significant or measurable non-adiabatic effects in an ultracold atom-ion charge-exchange reaction. In the laser frequency window, where conical interactions are present, the difference in rate coefficients can be as large as $10-9$ cm$3$/s.
  arXiv  Detail & Related papers  (2023-04-15T14:43:21Z)
• Fragile electronic superconductivity in Bi Single crystal [2.231168570551943]
  Bi is a compensated semi-metal with electrons and holes as charge carriers. We report the temperature dependence of the anisotropic critical field along the [$01bar 10$] (bisectrix)-crystallographic direction. Our theoretical analysis of the anisotropy of critical fields suggests that the light electrons in the three pockets of Bi bands are responsible for the SC.
  arXiv  Detail & Related papers  (2022-12-07T09:49:02Z)
• Orbital disorder and ordering in NaTiSi2O6: 29Si and 23Na NMR Study [0.0]
  NaTiSi2O6 is an exemplary compound, showing an orbital assisted spin-Peierls phase transition at Tc = 210 K. We present the results of 29Si and 23Na NMR measurements of NaTiSi2O6.
  arXiv  Detail & Related papers  (2022-05-10T14:23:13Z)
• Ion-molecule reactions below 1~K: Observation of a strong enhancement of the reaction rate of the ion-dipole reaction He$^+$+ CH$_3$F [55.41644538483948]
  Reaction between He$+$ and CH$_3$F forming predominantly CH$+$ and CHF$+$. To avoid heating of the ions by stray electric fields, the reaction was observed within the orbit of a highly excited Rydberg electron.
  arXiv  Detail & Related papers  (2021-12-22T17:32:43Z)
• Weak three-dimensional coupling of Heisenberg quantum spin chains in SrCuTe$_{2}$O$_{6}$ [0.0]
  The magnetic Hamiltonian of the Heisenberg quantum antiferromagnet SrCuTe$_2$O$_6$ is studied by inelastic neutron scattering technique on powder and single crystalline samples above and below the magnetic transition temperatures at 8 K and 2 K.
  arXiv  Detail & Related papers  (2021-07-12T11:44:42Z)
• Localization versus inhomogeneous superfluidity: Submonolayer He-4 on fluorographene, hexagonal boron nitride, and graphene [0.0]
  We study a sub monolayer He-4 adsorbed on fluorographene (GF) and on hexagonal boron nitride (hBN) at low coverage. The properties of the adsorbed He-4 atoms have been computed at finite temperature with path integral Monte Carlo.
  arXiv  Detail & Related papers  (2021-03-23T09:23:03Z)
• Algorithmic Ground-state Cooling of Weakly-Coupled Oscillators using Quantum Logic [52.77024349608834]
  We introduce a novel algorithmic cooling protocol for transferring phonons from poorly- to efficiently-cooled modes. We demonstrate it experimentally by simultaneously bringing two motional modes of a Be$+$-Ar$13+$ mixed Coulomb crystal close to their zero-point energies. We reach the lowest temperature reported for a highly charged ion, with a residual temperature of only $Tlesssim200mathrmmu K$ in each of the two modes.
  arXiv  Detail & Related papers  (2021-02-24T17:46:15Z)
• Trapping, Shaping and Isolating of Ion Coulomb Crystals via State-selective Optical Potentials [55.41644538483948]
  In conventional ion traps, the trapping potential is close to independent of the electronic state, providing confinement for ions dependent on their charge-to-mass ratio $Q/m$. Here we experimentally study optical dipole potentials for $138mathrmBa+$ ions stored within two distinctive traps operating at 532 nm and 1064 nm.
  arXiv  Detail & Related papers  (2020-10-26T14:36:48Z)
• Electrically tuned hyperfine spectrum in neutral Tb(II)(Cp$^{\rm{iPr5}}$)$_2$ single-molecule magnet [64.10537606150362]
  Both molecular electronic and nuclear spin levels can be used as qubits. In solid state systems with dopants, an electric field was shown to effectively change the spacing between the nuclear spin qubit levels. This hyperfine Stark effect may be useful for applications of molecular nuclear spins for quantum computing.
  arXiv  Detail & Related papers  (2020-07-31T01:48:57Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.