Spin-orbit tuned metal-insulator transitions in single-crystal Sr2Ir1−xRhx

Fragile magnetic order in the honeycomb lattice IridateNa2IrO3revealed by magnetic impurity doping

“…All samples were found to be local moment insulators. This is in contrast with Ru substituted Sr 2 IrO 4 where an insulator to metal change is found on increasing Ru content 30 T N = 15 K is suppressed to lower temperatures on increasing Ru content untill it is suppressed to below T = 2 K for a Ru content of x = 0.30 31 . In contrast, for Na 2 IrO 3 we find that even the smallest Ru substitution of x = 0.05 (5%) leads to the long range antiferromagnetic order (T N ≈ 15 K) of the parent compound to be replaced by a frozen spin-glassy state.…”

Evolution of magnetism in single-crystalCa2Ru1−xIrxYuan1, Terzic2, Wang3 et al. 2015Phys. Rev. BSelf Cite493751View full textAdd to dashboardCite

“…It is now recognized that the 5d-based iridates have strong SOC that competes vigorously with Coulomb interactions, non-cubic crystalline electric fields, and other relevant energies, leading to the "J eff = 1/2 state" [17][18][19][20][21]. One profound result of this competition is that 5d-iridates exhibit complex magnetic states with high critical temperatures, such as Sr 2 IrO 4 (T N = 240 K) [22], Sr 3 Ir 2 O 7 (T N = 285 K) [31,32] and BaIrO 3 (T C = 183 K) [33,34].…”

Dilute magnetism and spin-orbital percolation effects inSr2Ir1−xRhxClancy1, Lupascu2, Gretarsson3 et al. 2014Phys. Rev. BSelf Cite9591270View full textAdd to dashboardCite

“…The structural and magnetic similarities between these compounds have led to natural associations with superconductivity, and recent theoretical proposals 7,8 have spurred renewed interest in the properties of doped Sr 2 IrO 4 . Although many forms of electron, hole, and isoelectronic doping have been experimentally tested to date [9][10][11][12][13][14][15][16][17][18][19][20] , there is still much to learn about the impact of doping on the spin-orbital Mott insulating ground state. Sr 2 Ir 1−x Rh x O 4 represents an ideal candidate for experimental doping studies.…”