Electronic Structure of the BaFe$ 2$As$ 2$ Family of Iron Pnictides - Condensed Matter > SuperconductivityReportar como inadecuado




Electronic Structure of the BaFe$ 2$As$ 2$ Family of Iron Pnictides - Condensed Matter > Superconductivity - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: We use high resolution angle-resolved photoemission spectroscopy to study theband structure and Fermi surface topology of the BaFe$ 2$As$ 2$ iron pnictides.We observe two electron bands and two hole bands near the X-point, $\pi,\pi$of the Brillouin zone, in the paramagnetic state for different doping levels,including electron-doped BaCo$ {0.06}$Fe$ {0.94}$$ 2$As$ 2$, undopedBaFe$ 2$As$ 2$, and hole-doped Ba$ {0.6}$K$ {0.4}$Fe$ 2$As$ 2$. Among thesefour bands, only the electron bands cross the Fermi level, forming two electronpockets around X, while the hole bands approach but never reach the Fermilevel. We show that the band structure of the BaFe$ 2$As$ 2$ family matchesreasonably well with the prediction of LDA calculations after amomentum-dependent shift and renormalization. Our finding resolves a number ofinconsistencies regarding the electronic structure of pnictides.



Autor: M. Yi, D. H. Lu, J. G. Analytis, J.-H. Chu, S.-K. Mo, R.-H. He, X. J. Zhou, G. F. Chen, J. L. Luo, N. L. Wang, Z. Hussain, D. J.

Fuente: https://arxiv.org/







Documentos relacionados