@article{a8a06c957a0a4cd28963d69db3c9d3d9,
title = "Temperature-Driven Self-Doping in Magnetite",
abstract = "Magnetite is one of the most fascinating materials exhibiting the enigmatic first-order Verwey transition which is conventionally manipulated through chemical doping. Here, we show that heating magnetite results in a spontaneous charge reordering and, consequently, a hole self-doping effect at the octahedral sublattice. Core-level x-ray spectroscopy measurements combined with theory uncovers that there are three regimes of self-doping that map the temperature dependence of the electrical conductivity and magnetism up to the Curie temperature. Our results provide an elegant analogy between the effect of chemical doping and temperature-driven self-doping on trimerons in magnetite.",
author = "Hebatalla Elnaggar and Silvester Graas and Sara Lafuerza and Blanka Detlefs and Wojciech Tabi{\'s} and Gala, {Mateusz A.} and Ahmed Ismail and {van der Eerden}, Ad and Marcin Sikora and Honig, {Jurgen M.} and P. Glatzel and {de Groot}, Frank",
note = "Funding Information: European Synchrotron Radiation Facility H2020 European Research Council Nederlandse Organisatie voor Wetenschappelijk Onderzoek Narodowa Agencja Wymiany Akademickiej Ministerstwo Edukacji i Nauki Funding Information: We are grateful for the help of the scientists at beam line ID 26, the sample environment, and the safety group of the European Synchrotron Radiation Facility. We are also thankful to M. van der Linden and P. Zimmermann for their assistance during the beam time. A. Juhin, D. Cabaret, Ph. Sainctavit, and F. Meirer are thanked for fruitful discussions. This work was financed by the ERC advanced Grant XRAYonACTIVE No. 340279. H. E. acknowledges the finance of NWO Rubicon Fellowship (Project No. 019.201EN.010). W. T. and M. A. G. acknowledge financing provided by the Polish National Agency for Academic Exchange under “Polish Returns 2019” Program, PPN/PPO/2019/1/00014/U/0001, and subsidy of the Ministry of Science and Higher Education of Poland. Publisher Copyright: {\textcopyright} 2021 American Physical Society",
year = "2021",
month = oct,
day = "29",
doi = "10.1103/physrevlett.127.186402",
language = "English",
volume = "127",
pages = "1--5",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "18",
}