Superconductivity and Magnetism in Noncentrosymmetric RhGe

28 Sep 2015  ·  Tsvyashchenko A. V., Sidorov V. A., Petrova A. E., Fomicheva L. N., Zibrov I. P., Dmitrienko V. E. ·

RhGe synthesized at high pressure is crystallized in noncentrosymmetric cubic structure of the B20 type. Measurements of the electrical resistivity and magnetization demonstrate a superconducting state below T$_c$ ~ 4.5 K and a weak ferromagnetism below T$_m$ ~ 140 K. Specific heat data confirm the bulk nature of superconductivity in this ferromagnetic superconductor... The superconducting region forms a dome on the P-T diagram with a maximum of T$_c$ near 4 GPa. Ab initio simulations suggest that the observed weak magnetization emerges from the pronounced spin polarization with magnetic quadrupole and toroidal moments located at Rh and Ge sites. read more

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