Tunable Fermi-edge resonance in an open quantum dot

被引：50

作者：

Abanin, DA ^{[1
]}

Levitov, LS ^{[1
]}

机构：

[1] MIT, Dept Phys, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 12期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.93.126802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Resonant tunneling in an open mesoscopic quantum dot is proposed as a vehicle to realize a tunable Fermi-edge resonance with variable coupling strength. We solve the x-ray edge problem for a generic nonseparable scatterer and apply it to describe tunneling in a quantum dot. The tunneling current power law exponent is linked to the S matrix of the dot. The control of scattering by varying the dot shape and coupling to the leads allows us to explore a wide range of exponents. The sensitivity of mesoscopic coherence to the Wigner-Dyson ensemble symmetry is replicated in the Fermi-edge singularity.

引用

页码：126802 / 1

页数：4

共 31 条

[1] Shifts of random energy levels by a local perturbation [J].

Aleiner, IL ;

Matveev, KA .

PHYSICAL REVIEW LETTERS, 1998, 80 (04) :814-816

[2]

[Anonymous], 2003, QUANTUM NOISE MESOSC

[3] Nonequilibrium effects in transport through quantum dots [J].

Bascones, E ;

Herrero, CP ;

Guinea, F ;

Schön, G .

PHYSICAL REVIEW B, 2000, 61 (24) :16778-16786

[4] Random-matrix theory of quantum transport [J].

Beenakker, CWJ .

REVIEWS OF MODERN PHYSICS, 1997, 69 (03) :731-808

[5] BALLISTIC CONDUCTANCE FLUCTUATIONS IN SHAPE SPACE [J].

CHAN, IH ;

CLARKE, RM ;

MARCUS, CM ;

CAMPMAN, K ;

GOSSARD, AC .

PHYSICAL REVIEW LETTERS, 1995, 74 (19) :3876-3879

[6] FINITE-TEMPERATURE FERMI-EDGE SINGULARITY IN TUNNELING STUDIED USING RANDOM TELEGRAPH SIGNALS [J].

COBDEN, DH ;

MUZYKANTSKII, BA .

PHYSICAL REVIEW LETTERS, 1995, 75 (23) :4274-4277

[7] OBSERVATION OF SINGLE-ELECTRON CHARGING EFFECTS IN SMALL TUNNEL-JUNCTIONS [J].

FULTON, TA ;

DOLAN, GJ .

PHYSICAL REVIEW LETTERS, 1987, 59 (01) :109-112

[8] Anderson orthogonality catastrophe in disordered systems [J].

Gefen, Y ;

Berkovits, R ;

Lerner, IV ;

Altshuler, BL .

PHYSICAL REVIEW B, 2002, 65 (08) :1-4

[9] FERMI-EDGE SINGULARITY IN RESONANT-TUNNELING [J].

GEIM, AK ;

MAIN, PC ;

LASCALA, N ;

EAVES, L ;

FOSTER, TJ ;

BETON, PH ;

SAKAI, JW ;

SHEARD, FW ;

HENINI, M ;

HILL, G ;

PATE, MA .

PHYSICAL REVIEW LETTERS, 1994, 72 (13) :2061-2064

[10] 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

← 1 2 3 4 →