Magnetic-field-induced superconductivity in layered organic molecular crystals with localized magnetic moments

Article

关键词: BETS = BIS(ETHYLENEDITHIO)TETRASELENAFULVALENE;    FERMI-SURFACE;    LAMBDA-(BETS)(2)FECL4;    KAPPA-(BETS)(2)FEBR4;    TRANSITION;    SPINS;    CONDUCTORS;    INSULATOR;   

DOI  :  10.1103/PhysRevB.65.100502

来源: SCIE

【 摘 要 】

lambda-( BETS)(2)FeCl4 undergoes transitions from an antiferromagnetic insulator to a metal and then to a superconductor as a magnetic field is increased. We use a Hubbard-Kondo model to clarify the role of the Fe3+ magnetic ions in these phase transitions. In the high-field regime, the magnetic field acting on the electron spins is compensated by the exchange field H-e due to the magnetic ions. We show how H-e can be extracted from the observed splitting of the Shubnikov-de Haas frequencies. We predict the field range for field-induced superconductivity in other materials.

【 授权许可】

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