Mesoscopic Kondo problem

被引：20

作者：

Kaul, RK ^{[1
]}

Ullmo, D ^{[1
]}

Chandrasekharan, S ^{[1
]}

Baranger, HU ^{[1
]}

机构：

[1] Duke Univ, Dept Phys, Durham, NC 27708 USA

来源：

EUROPHYSICS LETTERS | 2005年 / 71卷 / 06期

关键词：

D O I：

10.1209/epl/i2005-10184-1

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the effect of mesoscopic fluctuations on a magnetic impurity coupled to a spatially confined electron gas with a temperature in the mesoscopic range (i.e. between the mean level spacing Delta and the Thouless energy E-Th). Comparing "poor-man's scaling" with exact Quantum Monte Carlo, we find that for temperatures larger than the Kondo temperature, many aspects of the fluctuations can be captured by the perturbative technique. Using this technique in conjunction with semi-classical approximations, we are able to calculate the mesoscopic fluctuations for a wide variety of systems. For temperatures smaller than the Kondo temperature, we find large fluctuations and deviations from the universal behavior.

引用

页码：973 / 979

页数：7

共 24 条

[1]

Abrikosov A. A., 1965, PHYSICS, V2, P5, DOI [10.1103/PhysicsPhysiqueFizika.2.5, DOI 10.1103/PHYSICSPHYSIQUEFIZIKA.2.5]

[2] Quantum effects in Coulomb blockade [J].

Aleiner, IL ;

Brouwer, PW ;

Glazman, LI .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2002, 358 (5-6) :309-440

[3]

Anderson P. W., 1970, J PHYS C SOLID STATE, V3, P2346

[4] SEMICLASSICAL ANALYSIS OF SPECTRAL CORRELATIONS IN MESOSCOPIC SYSTEMS [J].

ARGAMAN, N ;

IMRY, Y ;

SMILANSKY, U .

PHYSICAL REVIEW B, 1993, 47 (08) :4440-4457

[5] Observation of quantum fluctuations of charge on a quantum dot [J].

Berman, D ;

Zhitenev, NB ;

Ashoori, RC ;

Shayegan, M .

PHYSICAL REVIEW LETTERS, 1999, 82 (01) :161-164

[6] Transport through quantum dots in mesoscopic circuits [J].

Cornaglia, PS ;

Balseiro, CA .

PHYSICAL REVIEW LETTERS, 2003, 90 (21) :4

[7] KONDO EFFECT IN DISORDERED-SYSTEMS [J].

DOBROSAVLJEVIC, V ;

KIRKPATRICK, TR ;

KOTLIAR, G .

PHYSICAL REVIEW LETTERS, 1992, 69 (07) :1113-1116

[8] Carbon phosphide anions [J].

Fisher, K ;

Dance, I ;

Willett, G .

EUROPEAN MASS SPECTROMETRY, 1997, 3 (05) :331-338

[9] Kondo effect in a single-electron transistor [J].

Goldhaber-Gordon, D ;

Shtrikman, H ;

Mahalu, D ;

Abusch-Magder, D ;

Meirav, U ;

Kastner, MA .

NATURE, 1998, 391 (6663) :156-159

[10] THEORY OF THE ATOMIC LIMIT OF THE ANDERSON MODEL .1. PERTURBATION EXPANSIONS REEXAMINED [J].

HALDANE, FDM .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1978, 11 (24) :5015-5034

← 1 2 3 →