Electronic features around Fermi level correlating to occurrence of magnetism or superconductivity in Laves-phase intermetallic compounds
Xing-Qiu Chen, Shu-Lan Wang, Xue-Yong Ding, Xiang-Xun Xue
Abstract
Based on density functional calculations, the relationship between magnetism or superconductivity and electronic states around Fermi level were derived, and the location of the Fermi level in nonmagnetic "form" of Laves-phase compounds is very sensitive to determine the presence of nonmagnetism, or ferromagnetism, or antiferromagnetism, or superconductivity. The Fermi level at the nonbonding and antibonding regions corresponds for the nonmagnetism and magnetism, respectively, whereas at bonding region with responsibility for superconductivity. This rules will be very useful and convenient to search the new magnetic and superconductive materials.
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