تقرير
Coherence Temperature in the Diluted Periodic Anderson Model
| العنوان: | Coherence Temperature in the Diluted Periodic Anderson Model |
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| المؤلفون: | Costa, N. C., Mendes-Santos, T., Paiva, T., Curro, N. J., Santos, R. R. dos, Scalettar, R. T. |
| المصدر: | Phys. Rev. B 99, 195116 (2019) |
| سنة النشر: | 2018 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Disordered Systems and Neural Networks |
| الوصف: | The Kondo and Periodic Anderson Model (PAM) are known to provide a microscopic picture of many of the fundamental properties of heavy fermion materials and, more generally, a variety of strong correlation phenomena in $4f$ and $5f$ systems. In this paper, we apply the Determinant Quantum Monte Carlo (DQMC) method to include disorder in the PAM, specifically the removal of a fraction $x$ of the localized orbitals. We determine the evolution of the coherence temperature $T^*$, where the local moments and conduction electrons become entwined in a heavy fermion fluid, with $x$ and with the hybridization $V$ between localized and conduction orbitals. We recover several of the principal observed trends in $T^*$ of doped heavy fermions, and also show that, within this theoretical framework, the calculated Nuclear Magnetic Resonance (NMR) relaxation rate tracks the experimentally measured behavior in pure and doped CeCoIn$_5$. Our results contribute to important issues in the interpretation of local probes of disordered, strongly correlated systems. Comment: 8 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.99.195116 |
| URL الوصول: | http://arxiv.org/abs/1812.09426 |
| رقم الأكسشن: | edsarx.1812.09426 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.99.195116 |
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