Spectral properties of transition metal pnictides and chalcogenides: Angle-resolved photoemission spectroscopy and dynamical mean-field theory

详细信息    查看全文

• 作者：Ambroise van Roekeghem^a ; ^b ; ^{vanroeke@cpht.polytechnique.fr" class="auth_mail" title="E-mail the corresponding author} ; Pierre Richard^b ; ^c ; Hong Ding^b ; ^c ; Silke Biermann^a ; ^d ; ^e ;
• 关键词：Electronic Coulomb correlations ; Angle-resolved photoemission spectroscopy ; Dynamical mean field theory ; Transition metal pnictides and chalcogenides ; Hund's coupling induced spin-freezing ; Doping-dependent coherence
• 刊名：Comptes Rendus Physique
• 出版年：2016
• 出版时间：January-February 2016
• 年：2016
• 卷：17
• 期：1-2
• 页码：140-163
• 全文大小：3749 K

文摘

Electronic Coulomb correlations lead to characteristic signatures in the spectroscopy of transition metal pnictides and chalcogenides: quasi-particle renormalizations, lifetime effects or incoherent badly metallic behavior above relatively low coherence temperatures are measures of many-body effects due to local Hubbard and Hund's couplings. We review and compare the results of angle-resolved photoemission spectroscopy experiments (ARPES) and of combined density functional/dynamical mean-field theory (DFT+DMFT) calculations. We emphasize the doping-dependence of the quasi-particle mass renormalization and coherence properties.