A tunable Kondo effect in quantum dots

被引:1503
作者
Cronenwett, SM
Oosterkamp, TH
Kouwenhoven, LP
机构
[1] Delft Univ Technol, Dept Appl Phys, NL-2600 GA Delft, Netherlands
[2] Delft Univ Technol, DIMES, NL-2600 GA Delft, Netherlands
[3] Stanford Univ, Dept Phys, Stanford, CA 94305 USA
关键词
D O I
10.1126/science.281.5376.540
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
A tunable Kondo effect has been realized in small quantum dots. A dot can be switched from a Kondo system to a non-Kondo system as the number of electrons on the dot is changed from odd to even. The Kondo temperature can be tuned by means of a gate voltage as a single-particle energy state nears the Fermi energy. Measurements of the temperature and magnetic field dependence of a Coulomb-blockaded dot show good agreement with predictions of both equilibrium and nonequilibrium Kondo effects.
引用
收藏
页码:540 / 544
页数:5
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