Physics – Condensed Matter – Superconductivity
Scientific paper
2009-03-15
J. Phys. Soc. Jpn. 78 (2009) 063704.
Physics
Condensed Matter
Superconductivity
4pages, 6figures: to be published in J. Phys. Soc. Jpn. Vol.78 No.6 (2009)
Scientific paper
We report the precise pressure dependence of FeSe from a resistivity measurement up to 4.15 GPa. Superconducting transition temperature (T_c) increases sensitively under pressure, but shows a plateau between 0.5-1.5 GPa. The maximum T_c, which is determined by zero resistance, is 21 K at approximately 3.5 GPa. The onset value reaches ~37 K at 4.15 GPa. We also measure the nuclear spin-lattice relaxation rate 1/T_1 under pressure using 77Se--NMR measurement. 1/T_1 shows that bulk superconductivity is realized in the zero-resistance state. The pressure dependence of 1/T_1T just above T_c shows a plateau as well as the pressure dependence of T_c, which gives clear evidence of the close relationship between 1/T_1T and T_c. Spin fluctuations are suggested to contribute to the mechanism of superconductivity.
Hara Yoshiaki
Kotegawa Hisashi
Masaki Shogo
Mizuguchi Yoshikazu
Murata Keizo
No associations
LandOfFree
Precise Pressure Dependence of the Superconducting Transition Temperature of FeSe: Resistivity and ^77Se--NMR Study does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Precise Pressure Dependence of the Superconducting Transition Temperature of FeSe: Resistivity and ^77Se--NMR Study, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Precise Pressure Dependence of the Superconducting Transition Temperature of FeSe: Resistivity and ^77Se--NMR Study will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-165667