%0 Generic %1 Sun2009 %A Sun, L. %A Dai, X. %A Zhao, Z. %D 2009 %K SC cefeaso0 pnictides pressure %T Evidence for Competition between Superconductivity and Kondo Effect in CeFeAsO0.7F0.3 under High Pressure %U http://arxiv.org/abs/0907.4212 %X We demonstrate experimental evidence for pressure-induced competition between superconducting phase and Kondo screened phase in CeFeAsO0.7F0.3 through measurements of resistance, synchrotron x-ray diffraction, and x-ray absorption spectroscopy (XAS) in high-pressure diamond anvil cell. With increasing pressure, the superconducting critical temperature initially decreases gradually from ambient pressure until 8.6 GPa where it drops drastically and eventually disappears at ~10 GPa. Our XAS data of Ce-L3 in CeFeAsO0.7F0.3 clearly reveal a spectral weight transfer from the main line to the satellite line upon increasing pressure, a similar behavior to the gamma-alpha phase transition in cerium metal, suggesting pressure-induced enhancement of Kondo screening effect in CeFeAsO1-xFx.

@misc{Sun2009, abstract = { We demonstrate experimental evidence for pressure-induced competition between superconducting phase and Kondo screened phase in CeFeAsO0.7F0.3 through measurements of resistance, synchrotron x-ray diffraction, and x-ray absorption spectroscopy (XAS) in high-pressure diamond anvil cell. With increasing pressure, the superconducting critical temperature initially decreases gradually from ambient pressure until 8.6 GPa where it drops drastically and eventually disappears at ~10 GPa. Our XAS data of Ce-L3 in CeFeAsO0.7F0.3 clearly reveal a spectral weight transfer from the main line to the satellite line upon increasing pressure, a similar behavior to the gamma-alpha phase transition in cerium metal, suggesting pressure-induced enhancement of Kondo screening effect in CeFeAsO1-xFx. }, added-at = {2009-07-27T15:07:02.000+0200}, author = {Sun, L. and Dai, X. and Zhao, Z.}, biburl = {https://www.bibsonomy.org/bibtex/2f90dc176b28837136a658cd08c41b317/bsipos}, description = {[0907.4212] Evidence for Competition between Superconductivity and Kondo Effect in CeFeAsO0.7F0.3 under High Pressure}, interhash = {1d4f29e12e5ef7037034c6b1ca114bf8}, intrahash = {f90dc176b28837136a658cd08c41b317}, keywords = {SC cefeaso0 pnictides pressure}, note = {cite arxiv:0907.4212 Comment: 18 pages, 5 figures}, timestamp = {2009-07-27T15:07:02.000+0200}, title = {Evidence for Competition between Superconductivity and Kondo Effect in CeFeAsO0.7F0.3 under High Pressure}, url = {http://arxiv.org/abs/0907.4212}, year = 2009 }