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Hole doping by pressure on the 1111 pnictides CaFeAsF and SrFeAsF
- Source :
- Journal of Physics: Condensed Matter, Journal of Physics: Condensed Matter, IOP Publishing, 2014, 26 (15), pp.155702. ⟨10.1088/0953-8984/26/15/155702⟩
- Publication Year :
- 2014
- Publisher :
- HAL CCSD, 2014.
-
Abstract
- We determine the pressure phase diagram of the 1111 compounds CaFeAsF and SrFeAsF, up to 20 GPa and down to 4 K by electrical resistivity measurements and the change of structure up to 40 GPa at room temperature. The antiferromagnetic transition temperature, as determined by the derivative peak, shows a minimum at ~5 GPa (10 GPa) for the Ca (Sr) compound. For CaFeAsF, superconductivity appears at this minimum, coincident with the development of a previously reported monoclinic phase. For SrFeAsF, where the orthorhombic and the monoclinic phase were reported to coexist, superconductivity exists above P≥1 GPa. Both phase diagrams can be scaled by a shift of ~10 GPa pressure at which the volume of SrFeAsF and that of CaFeAsF at ambient pressure coincide. The difference of our phase diagram with that of electron-doped 1111 samples is accounted for by hole doping under pressure, which we verified through electron band structure calculations. Fil: Freitas, Daniele C.. Centre National de la Recherche Scientifique; Francia. Universite Joseph Fourier; Francia Fil: Garbarino, Gaston Leonel. European Synchrotron Radiation Facility; Francia Fil: Weht, Ruben Oscar. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes. Gerencia de Investigación y Aplicaciones; Argentina. Universidad Nacional de San Martín. Instituto Sabato; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Sow, Amadou. Universite Joseph Fourier; Francia. Centre National de la Recherche Scientifique; Francia Fil: Zhu, Xiyu. Chinese Academy of Sciences; República de China Fil: Han, Fei. Chinese Academy of Sciences; República de China Fil: Cheng, Peng. Chinese Academy of Sciences; República de China Fil: Ju, Jing. Chinese Academy of Sciences; República de China Fil: Wen, Hai Hu. Chinese Academy of Sciences; República de China Fil: Nunez Regueiro, Manuel Daniel. Universite Joseph Fourier; Francia. Centre National de la Recherche Scientifique; Francia
- Subjects :
- Phase transition
Superconductivity
Materials science
Ciencias Físicas
Arsenicals
Phase Transition
Condensed Matter::Materials Science
X-Ray Diffraction
Electrical resistivity and conductivity
Phase (matter)
Condensed Matter::Superconductivity
Pressure
Antiferromagnetism
Transition Temperature
General Materials Science
Ferrous Compounds
Phase diagram
Condensed matter physics
Transition temperature
Electric Conductivity
Calcium Compounds
Condensed Matter Physics
Astronomía
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Atmospheric Pressure
Models, Chemical
13. Climate action
Strontium
Electronic properties
Condensed Matter::Strongly Correlated Electrons
CIENCIAS NATURALES Y EXACTAS
Ambient pressure
Subjects
Details
- Language :
- English
- ISSN :
- 09538984 and 1361648X
- Database :
- OpenAIRE
- Journal :
- Journal of Physics: Condensed Matter, Journal of Physics: Condensed Matter, IOP Publishing, 2014, 26 (15), pp.155702. ⟨10.1088/0953-8984/26/15/155702⟩
- Accession number :
- edsair.doi.dedup.....289eebc89501511517129a31de7054cc