%0 Journal Article %1 PhysRevB.103.195112 %A Hemmida, M. %A Winterhalter-Stocker, N. %A Ehlers, D. %A von Nidda, H.-A. Krug %A Yao, M. %A Bannies, J. %A Rienks, E. D. L. %A Kurleto, R. %A Felser, C. %A Büchner, B. %A Fink, J. %A Gorol, S. %A Förster, T. %A Arsenijevic, S. %A Fritsch, V. %A Gegenwart, P. %D 2021 %I American Physical Society %J Phys. Rev. B %K b %N 19 %P 195112 %R 10.1103/PhysRevB.103.195112 %T Topological magnetic order and superconductivity in EuRbFe$_4$As$_4$ %U https://link.aps.org/doi/10.1103/PhysRevB.103.195112 %V 103 %X We study single crystals of the magnetic superconductor EuRbFe$_4$As$_4$ by magnetization, electron spin resonance (ESR), angle-resolved photoemission spectroscopy, and electrical resistance in pulsed magnetic fields up to 63 T. The superconducting state below 36.5 K is almost isotropic and is only weakly affected by the development of Eu2+ magnetic order at 15 K. On the other hand, for the external magnetic field applied along the c axis the temperature dependence of the ESR linewidth reveals a Berezinskii-Kosterlitz-Thouless topological transition below 15 K. This indicates that Eu2+ planes are a good realization of a two-dimensional XY magnet, which reflects the decoupling of the Eu2+ magnetic moments from superconducting FeAs layers.

@article{PhysRevB.103.195112, abstract = {We study single crystals of the magnetic superconductor EuRbFe$_4$As$_4$ by magnetization, electron spin resonance (ESR), angle-resolved photoemission spectroscopy, and electrical resistance in pulsed magnetic fields up to 63 T. The superconducting state below 36.5 K is almost isotropic and is only weakly affected by the development of Eu2+ magnetic order at 15 K. On the other hand, for the external magnetic field applied along the c axis the temperature dependence of the ESR linewidth reveals a Berezinskii-Kosterlitz-Thouless topological transition below 15 K. This indicates that Eu2+ planes are a good realization of a two-dimensional XY magnet, which reflects the decoupling of the Eu2+ magnetic moments from superconducting FeAs layers.}, added-at = {2021-10-14T16:57:51.000+0200}, author = {Hemmida, M. and Winterhalter-Stocker, N. and Ehlers, D. and von Nidda, H.-A. Krug and Yao, M. and Bannies, J. and Rienks, E. D. L. and Kurleto, R. and Felser, C. and B\"uchner, B. and Fink, J. and Gorol, S. and F\"orster, T. and Arsenijevic, S. and Fritsch, V. and Gegenwart, P.}, biburl = {https://www.bibsonomy.org/bibtex/225e1c72dcecd7d070ad31711b669e614/ctqmat}, day = 6, description = {Phys. Rev. B 103, 195112 (2021) - Topological magnetic order and superconductivity in $\mathrm{Eu}\mathrm{Rb}{\mathrm{Fe}}_{4}{\mathrm{As}}_{4}$}, doi = {10.1103/PhysRevB.103.195112}, interhash = {da7dd32fe3f198941cf961fa29f5b479}, intrahash = {25e1c72dcecd7d070ad31711b669e614}, journal = {Phys. Rev. B}, keywords = {b}, month = may, number = 19, numpages = {13}, pages = 195112, publisher = {American Physical Society}, timestamp = {2023-10-19T10:14:26.000+0200}, title = {Topological magnetic order and superconductivity in EuRbFe$_{\mathbf{4}}$As$_{\mathbf{4}}$}, url = {https://link.aps.org/doi/10.1103/PhysRevB.103.195112}, volume = 103, year = 2021 }