Effect of K-Dopant on the Electro-Magnetic Behaviors in Cu_1−xK_xIr₂S₄

Broadening of the orbitally-induced Peierls phase transition in Cu 1−x Na x Ir 2 S 4

“…which is similar to that in the K-doped Cu 1Àx K x Ir 2 S 4 system [29]. The lattice fluctuation of Na-doped system is 0.15%, even smaller than 0.3% of the K-doped system [29].…”

“…As can be seen, DT increases with x increasing, which indicates that the phase transition is broadened by the doping of Na. The broadening of the phase transition is also found in the Cu 1Àx K x Ir 2 S 4 system [29]. However, in Cu 1Àx Li x Ir 2 S 4 system, both T C M and T W M are increased by Li-doping [28].…”

“…It should be noted that A-sites are surrounded tetrahedrally by four S 2À ions with 2p 6 outer shell electrons. The transport behaviors suggested that hybridization exists between 3p 6 out shell of K + ions with 3p 6 electrons of S 2À in the K-doped system [29]. Similar hybridization should exist in the Na-doped system due to the similar outer shells of Na + and K + ions.…”

“…The lattice fluctuation of Na-doped system is 0.15%, even smaller than 0.3% of the K-doped system [29]. The slight doping effect on the lattice by Na or K is different from the Li-doped Cu 1Àx Li x Ir 2 S 4 system.…”

“…It has been demonstrated that the alkaline metal substitution yields some attractive effects, such as the enhancement of the phase transition in Cu 1Àx Li x Ir 2 S 4 [28], the metallic tendency of transport behavior in Cu 1Àx K x Ir 2 S 4 [29]. In this work, the Na-doped Cu 1Àx Na x Ir 2 S 4 system has been investigated.…”