Superconductivity and Magnetism in Noncentrosymmetric RhGe

A. V. Tsvyashchenko; V. A. Sidorov; A. E. Petrova; L. N. Fomicheva; I. P. Zibrov; V. E. Dmitrienko

Superconductivity and Magnetism in Noncentrosymmetric RhGe

Superconductivity 2015-09-29 v1

Authors: A. V. Tsvyashchenko , V. A. Sidorov , A. E. Petrova , L. N. Fomicheva , I. P. Zibrov , V. E. Dmitrienko

Abstract

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.

Keywords

superconductivity ferromagnetism noncentrosymmetric RhGe B20 structure high pressure ab initio

Cite

@article{arxiv.1509.08249,
  title  = {Superconductivity and Magnetism in Noncentrosymmetric RhGe},
  author = {A. V. Tsvyashchenko and V. A. Sidorov and A. E. Petrova and L. N. Fomicheva and I. P. Zibrov and V. E. Dmitrienko},
  journal= {arXiv preprint arXiv:1509.08249},
  year   = {2015}
}

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9 pages, 8 figures

Superconductivity and Magnetism in Noncentrosymmetric RhGe

Abstract

Keywords

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