Magnetic-field-induced superconductor-metal-insulator transitions in bismuth metal graphite

Article

关键词: C-AXIS RESISTIVITY;    PALLADIUM NANOPARTICLES;    INTERCALATION COMPOUND;    WEAK-LOCALIZATION;    2 DIMENSIONS;    THIN-FILMS;    SYSTEM;    MAGNETORESISTANCE;    BICL3-GRAPHITE;    TEMPERATURE;   

DOI  :  10.1103/PhysRevB.66.014533

来源: SCIE

【 摘 要 】

Bismuth metal graphite (MG) has a unique layered structure where Bi nanoparticles are encapsulated between adjacent sheets of nanographites. The superconductivity below T-c (=2.48 K) is due to Bi nanoparticles. The Curie-like susceptibility below 30 K is due to conduction electrons localized near zigzag edges of nanographites. A magnetic-field-induced transition from metallic to semiconductorlike phase is observed in the in-plane resistivity rho(a) around H-c (approximate to25 kOe) for both Hperpendicular toc and Hparallel toc (c: c axis). A negative magnetoresistance in rho(a) for Hperpendicular toc (040 kOe) suggest the occurrence of a two-dimensional weak-localization effect.

【 授权许可】

Free