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- W2100024141 abstract "Using textit{ab initio} calculation, we investigate systematically the structural and electronic properties of Ni$_{2}$Nb$_{1+x}$Sn$_{1-x}$ ($x$ = 0, 0.25, 0.50). Here, projector augmented wave approach (PAW) implemented in the Vienna textit{ab initio} simulation package (VASP) within generalized gradient approximation (GGA) for the exchange-correlation functional has been used. In this article, it is reported that though Ni$_{2}$NbSn and Ni$_{2}$Nb$_{1.25}$Sn$_{0.75}$ have no structural transformation, Ni$_{2}$Nb$_{1.5}$Sn$_{0.5}$ can transform to tetragonal structure from cubic L2$_{1}$ phase. The cubic lattice parameter decreases with Nb doping at Sn sites in off-stoichiometric alloys. The alloys are in paramagnetic phase in all the structures. The hybridization between Ni and Nb 3d states triggers the tetragonal distortion. Due to Nb doping in cubic L2$_{1}$ phase, there is a significant change in total density of states (DOSs) at Fermi energy (E$_{F}$) (N(E$_{F}$)). N(E$_{F}$) increases with increasing Nb doping. But, N(E$_{F}$) decreases during structural transformation of Ni$_{2}$Nb$_{1.5}$Sn$_{0.5}$. The superconducting critical temperature (T$_{C}$) also changes with Nb doping in cubic phase and tetragonal distortion because T$_{C}$ very much depends on N(E$_{F}$)." @default.
- W2100024141 created "2016-06-24" @default.
- W2100024141 creator A5051017494 @default.
- W2100024141 date "2013-06-01" @default.
- W2100024141 modified "2023-09-27" @default.
- W2100024141 title "RETRACTED: Structural and electronic properties of superconducting Heusler alloy Ni2Nb1+Sn1−: Ab initio approach" @default.
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- W2100024141 doi "https://doi.org/10.1016/j.commatsci.2013.02.016" @default.
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