In YBaCuFeO5, disorder in a maximal-entropy mixed phase favors coherent dispersive spin waves with acoustic and optical branches rather than destroying them.
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RIXS measurements find that effective magnetic exchange in SrIr1-xSnxO3 decreases continuously with Sn dilution according to a spin-dilution scaling law, confirming strong correlations in the metallic parent compound.
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Coherent spin waves in a maximal entropy phase
In YBaCuFeO5, disorder in a maximal-entropy mixed phase favors coherent dispersive spin waves with acoustic and optical branches rather than destroying them.
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Evolution of effective magnetic exchange interaction under spin dilution in SrIr$_{1-x}$Sn$_x$O$_3$
RIXS measurements find that effective magnetic exchange in SrIr1-xSnxO3 decreases continuously with Sn dilution according to a spin-dilution scaling law, confirming strong correlations in the metallic parent compound.