Electronic Characteristics of Quasi-2D Metallochloronitrides: Na(x)HfNCL (T_c=25 K)

Autor: R. Weht, Warren E. Pickett, Alessio Filippetti
Rok vydání: 1999
Předmět:
DOI: 10.48550/arxiv.cond-mat/9903214
Popis: Local density functional results are presented for the electron-doped metallochloronitrides A(x)ZrNCl and A(x)HfNCl, A = Li or Na, which superconduct up to 25K. The alkali non-stoichiometry is treated in a virtual crystal approximation. The electronic structure is strongly two dimensional, especially in the conduction band region occupied by the carriers, because the states are formed from the in-plane orbitals d_xy, d_{x^2-y^2} of the metal ion and the p_x, p_y orbitals of the N ion. We predict a change of behavior at a doping level of x=0.3.
Comment: To appear in Proc. HTS99 Conf., Miami 1999. Four revtex pages, 5 embedded postscript figures
Databáze: OpenAIRE