تقرير
Magneto-optical behaviour of EuIn_2P_2
| العنوان: | Magneto-optical behaviour of EuIn_2P_2 |
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| المؤلفون: | Pfuner, F., Ott, L. Degiorgi. H. R., Bianchi, A. D., Fisk, Z. |
| المصدر: | Phys. Rev. B77, 024417 (2008) |
| سنة النشر: | 2007 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science |
| الوصف: | We report results of a magneto-optical investigation of the Zintl-phase compound EuIn$_2$P$_2$. The compound orders magnetically at $T_C$=24 K and exhibits concomitant large magnetoresistance effects. For $T\le$50 K and increasing magnetic fields we observe a transfer of spectral weight in $\sigma_1(\omega)$ from energies above 1 eV into the low-energy metallic component as well as into a mid-infrared signal centered at about 600 cm$^{-1}$. This latter absorption is reminiscent to what has been seen in a large variety of so-called Kondo materials and ascribed to excitations across the hybridization gap. The observed gain of Drude weight upon increasing magnetic field suggests an enhancement of the itinerant charge-carrier concentration due to the increasing magnetization, a phenomenon that was previously observed in other compounds which exhibit colossal magnetoresistive effects. Comment: 13 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.77.024417 |
| URL الوصول: | http://arxiv.org/abs/0709.0791 |
| رقم الأكسشن: | edsarx.0709.0791 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.77.024417 |
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