20.500.12556/RUL-165852 Photoinduced charge transfer renormalization in NiO Photodoped states in strongly correlated charge-transfer insulators are characterized by d-d and d-p interactions and the resulting intertwined dynamics of charge excitations and local multiplets. Here, we use femtosecond x-ray absorption spectroscopy in combination with dynamical mean-field theory to disentangle these contributions in NiO. Upon resonant optical excitation across the charge-transfer gap, the Ni L$_3$ and O K absorption edges red-shift for >10 ps, which we associate with photoinduced changes in the screening environment. An additional signature below the Ni L$_3$ edge is identified for <1 ps, reflecting a transient nonthermal population of local many-body multiplets. We employ a nonthermal generalization of the multiplet ligand field theory and argue that this feature originates from d-d transitions. Overall, the photodoped state differs significantly from a chemically doped state. Our results demonstrate that x-ray spectroscopies are helpful in revealing excitation pathways in correlated materials. condensed matter physics fizika kondenzirane snovi true false true Angleški jezik Slovenski jezik Članek v reviji 2024-12-12 12:02:05 2024-12-12 12:02:06 2024-12-13 03:57:45 0000-00-00 00:00:00 2024 0 0 Str. 245120-1-245120-15 iss. 24 Vol. 110 2024 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 538.9 2469-9950 10.1103/PhysRevB.110.245120 218652163 NiO_XAS_(7).pdf NiO_XAS_(7).pdf 1 5E5EA4D9A2485701565CEDBBB3ED42C8 7a6ddfdd6522fe8f716994705a074e0d9d22150a425ce8cce372e65e85091ff3 1f52825c-b879-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=197111 https://journals.aps.org/prb/abstract/10.1103/PhysRevB.110.245120 0 2d137da2-b879-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=197112 Fakulteta za matematiko in fiziko 0 0 0