Transmission phase shift of a quantum dot with Kondo correlations

被引：137
|
作者：
Gerland, U
von Delft, J
Costi, TA
Oreg, Y
机构：
[1] Univ Karlsruhe, Inst Theoret Festkorperphys, D-76128 Karlsruhe, Germany
[2] Univ Augsburg, D-86135 Augsburg, Germany
[3] Harvard Univ, Lyman Lab Phys, Cambridge, MA 02138 USA
来源：
PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 16期
关键词：
D O I：
10.1103/PhysRevLett.84.3710
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the effects of Kondo correlations on the transmission phase shift uf a quantum dot in an Aharonov-Bohm ring. We predict in detail how the development of a Kondo resonance should affect the dependence of the phase shift on transport voltage, gate voltage, and temperature. This system should allow the first direct observation of the well-known scattering phase shift of pi/2 expected (but not directly measurable in bulk systems) at zero temperature for an electron scattering off a spin-1/2 impurity that is screened into a singlet.
引用
收藏
页码：3710 / 3713
页数：4
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