Charge-ordered state satisfying the Anderson condition in LiRh2O4 arising from local dimer order

Abstract

We report on the charge-ordered structure of LiRh2O4 arising below the metal-insulator transition at 170 K. Structural studies using synchrotron X-rays have revealed that the charge-ordered states of Rh3+ and Rh4+ with dimerization are realized in the low-temperature phase below 170 K. Although the low-temperature ground state resembles that of CuIr2S4, a charge ordering pattern satisfying the Anderson condition is realized in LiRh2O4. Based on structural information such as the short-range order of dimers appearing above the transition temperature and the weakening of the correlation between rhodium one-dimensional chains appearing in the crystal structure, we argue that the Coulomb interaction plays an important role in determining the charge ordering patterns.

6 pages, 4figures Journal reference(accepted) https://journals.aps.org/prb/accepted/0b072Y1fT3817c8014452620ec61a998d0036f7ef

References in corpus (9)

• Anisotropic thermodynamic and transport properties of single crystalline (Ba${}_{1-x}$K${}_x$)Fe${}_2$As${}_2$ (x = 0 and 0.45)
• Band Jahn-Teller Instability and Formation of Valence Bond Solid in a Mixed-Valent Spinel Oxide LiRh2O4
• Room temperature local nematicity in FeSe superconductor
• Regular-Triangle Trimer and Charge Order Preserving the Anderson Condition in the Pyrochlore Structure of CsW${}_2$O${}_6$
• Quantitative characterization of short-range orthorhombic fluctuations in FeSe through pair distribution function analysis
• Vanadium trimers randomly aligned along the c-axis direction in layered LiVO2
• Slow dynamics of disordered zigzag chain molecules in layered LiVS2 under electron irradiation
• Nanoscale degeneracy lifting in a geometrically frustrated antiferromagnet
• Robust atomic orbital in the cluster magnet LiMoO2

Cited by in corpus (6)

• Observation of local atomic displacements intrinsic to the double zigzag chain structure of 1T-MTe2 (M = V, Nb, Ta)
• Short-range order and increased transition temperature in LiVO2 with weakened trimer frustration
• Soft-Chemical Synthesis, Structure Evolution, and Insulator-to-Metal Transition in a Prototypical Metal Oxide, λ-RhO${}_2$
• Zigzag chain order of LiVSe${}_2$ developing away from the vanadium trimer phase transition boundary
• Electronic Self-Organization in the β-Pyrochlore Oxide CsW2O6
• Reexamination of the charge-ordered dimer pattern in the spinel compound CuIr2S4 using single-crystal synchrotron x-ray diffraction