SUBSTANCE CAPABLE OF EXHIBITING DELIVERY PHENOMENON OF WEYL FERMION, AND MAGNETORESISTIVE ELEMENT

摘要

A substance capable of exhibiting the delivery phenomenon of weyl fermion comprises SrRuO3 and is known to have a ratio of a resistivity ρ at 300 K to a resistivity ρ at 4 K, i.e., [residual resistance ratio RRR ≡ ρ(300K)/ρ(4K)], of 20 or more. Therefore, the delivery phenomenon of weyl fermion can be achieved by producing the substance (SrRuO3) under growth conditions where the RRR value can become 20 or more.