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Recent experiments have found that in contrast to the nonsuperconducting bulk RNiO2(R=Nd,La,and Pr),the strontium-doped R1-xSrxNiO2 thin films show superconductivity with the critical temperature Tc of 9–15 K at x=0.2,whose origin of superconductivity deserves further investigation.Based on first-principles calculations,we study the electronic structure,lattice dynamics,and electron–phonon coupling (EPC) of the undoped and doped RNiO2 相似文献
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Magnetic CeTe2 achieving superconductivity under external pressure has received considerable attention.The intermingling of 4f and 5d electrons from Ce raised the speculation of an unconventional pairing mechanism arising from magnetic fluctuations.Here,we address this speculation using a nonmagnetic 4f-electron-free LaTe2as an example.No structural phase transition can be observed up to 35 GPa in the in situ synchrotron diffraction patterns.Subsequent high-pressure electri... 相似文献
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