تقرير
Orientation of ground-state orbital in CeCoIn$_5$ and CeRhIn$_5$
| العنوان: | Orientation of ground-state orbital in CeCoIn$_5$ and CeRhIn$_5$ |
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| المؤلفون: | Sundermann, M., Amorese, A., Strigari, F., Leedahl, B., Haverkort, M. W., Gretarsson, H., Tjeng, L. H., Sala, M. Moretti, Yavş, H., Bauer, E. D., Rosa, P. F. S., Thompson, J. D., Severing, A. |
| المصدر: | Phys. Rev. B 99, 235143 (2019) |
| سنة النشر: | 2019 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | We present core level non-resonant inelastic x-ray scattering (NIXS) data of the heavy fermion compounds CeCoIn$_5$ and CeRhIn$_5$ measured at the Ce $N_{4,5}$-edges. The higher than dipole transitions in NIXS allow determining the orientation of the $\Gamma_7$ crystal-field ground-state orbital within the unit cell. The crystal-field parameters of the Ce$M$In$_5$ compounds and related substitution phase diagrams have been investigated in great detail in the past; however, whether the ground-state wavefunction is the $\Gamma_7^+$ ($x^2\,-\,y^2$) or $\Gamma_7^-$ ($xy$ orientation) remained undetermined. We show that the $\Gamma_7^-$ doublet with lobes along the (110) direction forms the ground state in CeCoIn$_5$ and CeRhIn$_5$. For CeCoIn$_5$, however, we find also some contribution of the first excited state crystal-field state in the ground state due to the stronger hybridization of 4$f$ and conduction electrons, suggesting a smaller $\alpha^2$ value than originally anticipated from x-ray absorption. A comparison is made to the results of existing density functional theory plus dynamical mean-field theory calculations. Comment: 6 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.99.235143 |
| الوصول الحر: | http://arxiv.org/abs/1902.06726Test |
| رقم الانضمام: | edsarx.1902.06726 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.99.235143 |
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