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M Zaid Zaz

Publications and source records attributed to M Zaid Zaz.

2 recordsLinked to original sources
arXiv2026

Switchable circular dichroism and ionic migration dominated charge transport in a chiral spin crossover polymer

We demonstrate thermally switchable chiroptical activity in a chiral spin crossover (SCO) material, where circular dichroism is significant in the low spin state but quenched in the high-spin state for both enantiomers. With magnetometry we establish a cooperative transition with hysteresis near room temperature. Fe L3,2 edge Xray absorption directly links the quenching of chirality to a reorganization of Fe 3d electronic structure that accompanies the spin state transition. Moreover, electrical measurements show pronounced I(V) hysteresis and cycling dependent C(V) behavior, indicating transport in this chiral SCO material is dominated by ionic migration rather than mobile electrons or holes.

cond-mat.mtrl-sci↗
arXiv2024

Chiral effects at the metal center in Fe(III) spin crossover coordination salts

Evidence of chirality was observed at the Fe metal center in Fe(III) spin crossover coordination salts [Fe(qsal)2][ Ni(dmit)2] and [Fe(qsal)2](TCNQ)2 from X-ray absorption spectroscopy at the Fe 2p3/2 core threshold. This indicates the formation of chiral domains that influence the octahedral coordination on the Fe core.

cond-mat.mtrl-sci↗