The staging influence on the electronic structure and transport of superconducting sodium-doped hafnium nitride chloride

Alemany, Pere; Canadell, Enric; Fuertes, Amparo

doi:10.1039/b712284e

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…The first compound Na 0.125 HfNCl was discussed as second staging variant in comparison to regular Na 0.25 HfNCl [149] with the occupation of only every second van-derWaals gap by sodium. Additionally to the doubled c-axis, this leads to a lower critical temperature (20 K) compared to Na 0.25 HfNCl (23 K) [149].…”

Section: Structural Changesmentioning

confidence: 97%

Superconducting nitride halides MNX (M = Ti, Zr, Hf; X = Cl, Br, I)

Schurz

Shlyk

Schleid

et al. 2011

Zeitschrift Für Kristallographie

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Abstract. Two different polymorphs of the metal nitride halides MNX (M ¼ Ti, Zr, Hf; X ¼ Cl, Br, I) are known to crystallize in layered structures. The two crystal structures differ in the way 2 1 {X[M 2 N 2 ]X} slabs are stacked along the c-axes. Metal atoms and/or organic molecules can be intercalated into the van-der-Waals gap between these layers. After such an electron-doping via intercalation the prototypic band insulators change into superconductors with moderate high critical temperatures T c up to 25.5 K. This review gathers information on synthesis routes, structural characteristics and properties of the prototypic nitride halides and the derivatives after electron-doping with a focus on superconductivity.

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Section: Structural Changesmentioning

confidence: 97%

Superconducting nitride halides MNX (M = Ti, Zr, Hf; X = Cl, Br, I)

Schurz

Shlyk

Schleid

et al. 2011

Zeitschrift Für Kristallographie

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“…The electron doping in β-HfNCl or β-ZrNCl takes place in a band with primarily metal d xy , d x 2 −y 2 and some N p x , p y character [29,[58][59][60][61]. Physical measurements indicate that the intercalated compounds are not conventional BCS superconductors.…”

Section: Superconducting Propertiesmentioning

confidence: 99%

Chemistry and superconductivity of intercalated metal nitride halides

Fuertes¹

2014

Semicond. Sci. Technol.

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Titanium, zirconium and hafnium nitride halides show layered structures based on double slabs with compositions [X-M-N-N-M-X] (X = Cl, Br or I; M = Ti, Zr or Hf) that are separated by van der Waals gaps. Intercalation of electron donor species between the double layers induces superconductivity with critical temperatures up to 25.5 K. This review discusses the synthesis and structural chemistry of the hosts and intercalation compounds in this group of materials, as well as the influence of the structural and chemical features of the intercalates on the superconducting properties.

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The staging influence on the electronic structure and transport of superconducting sodium-doped hafnium nitride chloride

Abstract: Staging may strongly influence the transport of superconducting Na x HfNCl for values of x y 0.29, where the phases of stage 1 and stage 2 could exhibit different transport behaviour according to a first principles DFT study.

Cited by 2 publications

References 27 publications

Superconducting nitride halides MNX (M = Ti, Zr, Hf; X = Cl, Br, I)

Superconducting nitride halides MNX (M = Ti, Zr, Hf; X = Cl, Br, I)

Chemistry and superconductivity of intercalated metal nitride halides

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