%0 Journal Article %1 PhysRevLett.126.136401 %A Miao, Lin %A Min, Chul H. %A Xu, Yishuai %A Huang, Zengle %A Kotta, Erica C. %A Basak, Rourav %A Song, M. S. %A Kang, B. Y. %A Cho, B. K. %A Kißner, K. %A Reinert, F. %A Yilmaz, Turgut %A Vescovo, Elio %A Chuang, Yi-De %A Wu, Weida %A Denlinger, Jonathan D. %A Wray, L. Andrew %D 2021 %I American Physical Society %J Phys. Rev. Lett. %K b %N 13 %P 136401 %R 10.1103/PhysRevLett.126.136401 %T Robust surface states and coherence phenomena in magnetically alloyed SmB$_6$ %U https://link.aps.org/doi/10.1103/PhysRevLett.126.136401 %V 126 %X Samarium hexaboride is a candidate for the topological Kondo insulator state, in which Kondo coherence is predicted to give rise to an insulating gap spanned by topological surface states. Here we investigate the surface and bulk electronic properties of magnetically alloyed $Sm_1−xM_xB_6 (M=Ce, Eu)$, using angle-resolved photoemission spectroscopy and complementary characterization techniques. Remarkably, topologically nontrivial bulk and surface band structures are found to persist in highly modified samples with up to 30% Sm substitution and with an antiferromagnetic ground state in the case of Eu doping. The results are interpreted in terms of a hierarchy of energy scales, in which surface state emergence is linked to the formation of a direct Kondo gap, while low-temperature transport trends depend on the indirect gap.

@article{PhysRevLett.126.136401, abstract = {Samarium hexaboride is a candidate for the topological Kondo insulator state, in which Kondo coherence is predicted to give rise to an insulating gap spanned by topological surface states. Here we investigate the surface and bulk electronic properties of magnetically alloyed $Sm_{1−x}M_xB_6 (M=Ce, Eu)$, using angle-resolved photoemission spectroscopy and complementary characterization techniques. Remarkably, topologically nontrivial bulk and surface band structures are found to persist in highly modified samples with up to 30% Sm substitution and with an antiferromagnetic ground state in the case of Eu doping. The results are interpreted in terms of a hierarchy of energy scales, in which surface state emergence is linked to the formation of a direct Kondo gap, while low-temperature transport trends depend on the indirect gap.}, added-at = {2021-05-28T09:53:50.000+0200}, author = {Miao, Lin and Min, Chul H. and Xu, Yishuai and Huang, Zengle and Kotta, Erica C. and Basak, Rourav and Song, M. S. and Kang, B. Y. and Cho, B. K. and Kißner, K. and Reinert, F. and Yilmaz, Turgut and Vescovo, Elio and Chuang, Yi-De and Wu, Weida and Denlinger, Jonathan D. and Wray, L. Andrew}, biburl = {https://www.bibsonomy.org/bibtex/2bb1860bd3b00486fce9ef00464b265e4/ctqmat}, day = 31, description = {Phys. Rev. Lett. 126, 136401 (2021) - Robust Surface States and Coherence Phenomena in Magnetically Alloyed ${\mathrm{SmB}}_{6}$}, doi = {10.1103/PhysRevLett.126.136401}, interhash = {174c92d96599b8ea00306c9459b74c23}, intrahash = {bb1860bd3b00486fce9ef00464b265e4}, journal = {Phys. Rev. Lett.}, keywords = {b}, month = {03}, number = 13, numpages = {7}, pages = 136401, publisher = {American Physical Society}, timestamp = {2023-10-19T10:28:07.000+0200}, title = {Robust surface states and coherence phenomena in magnetically alloyed SmB$_{\mathbf{6}}$}, url = {https://link.aps.org/doi/10.1103/PhysRevLett.126.136401}, volume = 126, year = 2021 }