Superconductivity of KFe2As2 Under Pressure: Ab Initio Study of Tetragonal and Collapsed Tetragonal Phases
نویسندگان
چکیده
منابع مشابه
High-temperature superconductivity stabilized by electron-hole interband coupling in collapsed tetragonal phase of KFe2As2 under high pressure
Yasuyuki Nakajima,1 Renxiong Wang,1 Tristin Metz,1 Xiangfeng Wang,1 Limin Wang,1 Hyunchae Cynn,2 Samuel T. Weir,2 Jason R. Jeffries,2 and Johnpierre Paglione1 1Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, Maryland 20742, USA 2Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA (Received 16 Janu...
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NaFe2As2 is investigated experimentally using powder x-ray diffraction and Raman spectroscopy at pressures up to 23 GPa at room temperature and using ab-initio calculations. The results reveal a pressure-induced structural modification at 4 GPa from the starting tetragonal to a collapsed tetragonal phase. We determined the changes in interatomic distances under pressure that allowed us to conne...
متن کاملSuppression of superconductivity and structural phase transitions under pressure in tetragonal FeS
Pressure is a powerful tool to study iron-based superconductors. Here, we report systematic high-pressure transport and structural characterizations of the newly discovered superconductor FeS. It is found that superconductor FeS (tetragonal) partly transforms to a hexagonal structure at 0.4 GPa, and then completely transforms to an orthorhombic phase at 7.4 GPa and finally to a monoclinic phase...
متن کاملPressure suppression of electron correlation in the collapsed tetragonal phase of CaFe2As2: A DFT-DMFT investigation
Subhasish Mandal,1,* R. E. Cohen,1,2 and K. Haule3 1Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015, USA 2Department of Earth Sciences, University College London, Gower Street, London WC1E 6BT, United Kingdom 3Department of Physics, Rutgers University, Piscataway, New Jersey 08854, USA (Received 21 May 2014; revised manuscript received 14 July 2014; published 6 ...
متن کاملSuppression of electron correlations in the collapsed tetragonal phase of CaFe2As2 under ambient pressure demonstrated by As75 NMR/NQR measurements
The static and the dynamic spin correlations in the low-temperature collapsed tetragonal and the hightemperature tetragonal phase in CaFe2As2 have been investigated by As75 nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) measurements. Through the temperature (T) dependence of the nuclear spin lattice relaxation rates (1/T1) and the Knight shifts, although stripe-type ant...
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ژورنال
عنوان ژورنال: Journal of Superconductivity and Novel Magnetism
سال: 2020
ISSN: 1557-1939,1557-1947
DOI: 10.1007/s10948-020-05454-w