A resistivity decrease due to ESR has been observed in the metallic concentration region of P-doped Si at temperatures 1.5–4.2 K. This result is discussed in terms of the spin-dependent transport, the ESR-associated cavity loss effect and the resistivity decrease effect associated with the localized region. The results of the resistivity changes due to ESR and also due to microwave irradiation at off resonance suggest that the localized region plays an important role for these phenomena even in metallic samples of P-doped Si.
Kazuo MorigakiNaoki KishimotoD. Lépine
LIN HUNG-IChang-Sik JungSHUNG FA-HUACHEN CHANG-LAN中国科学院