Dynamical signature of the Mott-Hubbard transition in Ni(S,SE)(2)

被引:54
作者
Husmann, S
Jin, DS
Zastavker, YV
Rosenbaum, TF
Yao, X
Honig, JM
机构
[1] UNIV CHICAGO,JAMES FRANCK INST,CHICAGO,IL 60637
[2] UNIV CHICAGO,DEPT PHYS,CHICAGO,IL 60637
[3] PURDUE UNIV,DEPT CHEM,W LAFAYETTE,IN 47907
关键词
D O I
10.1126/science.274.5294.1874
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The transition metal chalcogenide Ni(S,Se)(2) is one of the few highly correlated, Mott-Hubbard systems without a strong first-order structural distortion that normally cuts off the critical behavior at the metal-insulator transition. The zero-temperature (T) transition was tuned with pressure, and significant deviations were found near the quantum critical point from the usual T-1/2 behavior of the conductivity characteristic of electron-electron interactions in the presence of disorder. The transport data for pressure and temperature below 1 kelvin could be collapsed onto a universal scaling curve.
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页码:1874 / 1876
页数:3
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