Non-Kondo-like electronic structure in the correlated rare-earth hexaboride YbB6

Neupane, Madhab; Xu, Su -Yang; Alidoust, Nasser; Bian, Guang; Kim, D. J.; Liu, Chang; Belopolski, I.; Chang, T. -R.; Jeng, H. -T.; Durakiewicz, T.; Lin, H.; Bansil, A.; Fisk, Z.; Hasan, M. Z.

doi:10.1103/PhysRevLett.114.016403

Non-Kondo-like electronic structure in the correlated rare-earth hexaboride ${Y b B}_{6}$

Journal Article · Wed Jan 07 00:00:00 EST 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.114.016403· OSTI ID:1304823

Neupane, Madhab ^[1]; Xu, Su -Yang ^[1]; Alidoust, Nasser ^[1]; Bian, Guang ^[1]; Kim, D. J. ^[2]; Liu, Chang ^[1]; Belopolski, I. ^[1]; Chang, T. -R. ^[3]; Jeng, H. -T. ^[4]; Durakiewicz, T. ^[5]; Lin, H. ^[6]; Bansil, A. ^[7]; Fisk, Z. ^[2]; Hasan, M. Z. ^[1]

Princeton Univ., Princeton, NJ (United States)
Univ. of California, Irvine, CA (United States)
National Tsing Hua Univ., Hsinchu (Taiwan)
National Tsing Hua Univ., Hsinchu (Taiwan); Academia Sinica, Taipei (Taiwan)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
National Univ. of Singapore (Singapore)
Northeastern Univ., Boston, MA (United States)

Here, we present angle-resolved photoemission studies on the rare-earth-hexaboride YbB₆, which has recently been predicted to be a topological Kondo insulator. Our data do not agree with the prediction and instead show that YbB₆ exhibits a novel topological insulator state in the absence of a Kondo mechanism. We find that the Fermi level electronic structure of YbB₆ has three 2D Dirac cone like surface states enclosing the Kramers’s points, while the f orbital that would be relevant for the Kondo mechanism is ~1 eV below the Fermi level. Our first-principles calculation shows that the topological state that we observe in YbB₆ is due to an inversion between Yb d and B p bands. These experimental and theoretical results provide a new approach for realizing novel correlated topological insulator states in rare-earth materials.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1304823

Alternate ID(s):: OSTI ID: 1181380

Report Number(s):: LA-UR--14-23024

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 114; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Discovery of topological nodal-line fermionic phase in a magnetic material GdSbTe Hosen, M. Mofazzel; Dhakal, Gyanendra; Dimitri, Klauss Scientific Reports, Vol. 8, Issue 1 https://doi.org/10.1038/s41598-018-31296-7	journal	September 2018
Pressure-induced exotic states in rare earth hexaborides Sun, Liling; Wu, Qi Reports on Progress in Physics, Vol. 79, Issue 8 https://doi.org/10.1088/0034-4885/79/8/084503	journal	July 2016
Observation of Dirac-like semi-metallic phase in NdSb Neupane, Madhab; Mofazzel Hosen, M.; Belopolski, Ilya Journal of Physics: Condensed Matter, Vol. 28, Issue 23 https://doi.org/10.1088/0953-8984/28/23/23lt02	journal	May 2016
Exploring itinerant states in divalent hexaborides using rare-earth L edge resonant inelastic x-ray scattering Sheets, Donal; Flynn, Vincent; Kim, Jungho Journal of Physics: Condensed Matter, Vol. 32, Issue 13 https://doi.org/10.1088/1361-648x/ab5e0f	journal	December 2019
Roadmap on plasmonics Stockman, Mark I.; Kneipp, Katrin; Bozhevolnyi, Sergey I. Journal of Optics, Vol. 20, Issue 4 https://doi.org/10.1088/2040-8986/aaa114	journal	March 2018
Surface resonance of the ( 2 × 1 ) reconstructed lanthanum hexaboride (001)-cleavage plane: A combined STM and DFT study Buchsteiner, P.; Sohn, F.; Horstmann, J. G. Physical Review B, Vol. 100, Issue 20 https://doi.org/10.1103/physrevb.100.205407	journal	November 2019
Observation of topological nodal fermion semimetal phase in ZrSiS Neupane, Madhab; Belopolski, Ilya; Hosen, M. Mofazzel Physical Review B, Vol. 93, Issue 20 https://doi.org/10.1103/physrevb.93.201104	journal	May 2016
Electronic Structure of YbB 6 : Is it a Topological Insulator or Not? Kang, Chang-Jong; Denlinger, J. D.; Allen, J. W. Physical Review Letters, Vol. 116, Issue 11 https://doi.org/10.1103/physrevlett.116.116401	journal	March 2016
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Observation of Dirac-Like Semi-Metallic Phase in NdSb Neupane, Madhab; Hosen, M. Mofazzel; Belopolski, Ilya arXiv https://doi.org/10.48550/arxiv.1605.00151	text	January 2016
Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd Neupane, Madhab; Alidoust, Nasser; Hosen, M. Mofazzel arXiv https://doi.org/10.48550/arxiv.1610.03431	text	January 2016

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