Transient dynamics of spin-polarized injection in helical Luttinger liquids

被引：15

作者：

Calzona, A. ^{[1
]}

Carrega, M. ^{[2
]}

Dolcetto, G. ^{[2
]}

Sassetti, M. ^{[1
,2
]}

机构：

[1] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy

[2] CNR SPIN, Via Dodecaneso 33, I-16146 Genoa, Italy

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2015年 / 74卷

关键词：

Topological insulators; Luttinger liquids; Transient dynamics; FRACTIONAL CHARGE; CONDUCTANCE; TRANSPORT;

D O I：

10.1016/j.physe.2015.08.033

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We analyze the time evolution of spin-polarized electron wave packets injected into the edge states of a two-dimensional topological insulator. In the presence of electron interactions, the system is described as a helical Luttinger liquid and injected electrons fractionalize. However, because of the presence of metallic detectors, no evidences of fractionalization are encoded in dc measurements, and in this regime the system does not show deviations from its non interacting behavior. Nevertheless, we show that the helical Luttinger liquid nature emerges in the transient dynamics, where signatures of charge/spin fractionalization can be clearly identified. (C) 2015 Elsevier B.V. All rights reserved.

引用

收藏

页码：630 / 636

页数：7

相关论文

共 56 条

[1] EDGE MAGNETOPLASMONS IN THE TIME DOMAIN [J].

ASHOORI, RC ;

STORMER, HL ;

PFEIFFER, LN ;

BALDWIN, KW ;

WEST, K .

PHYSICAL REVIEW B, 1992, 45 (07) :3894-3897

[2] Measuring fractional charge in carbon nanotubes [J].

Bena, C ;

Vishveshwara, S ;

Balents, L ;

Fisher, MPA .

JOURNAL OF STATISTICAL PHYSICS, 2001, 103 (3-4) :429-440

[3] Fractional Charges on an Integer Quantum Hall Edge [J].

Berg, E. ;

Oreg, Y. ;

Kim, E.-A. ;

von Oppen, F. .

PHYSICAL REVIEW LETTERS, 2009, 102 (23)

[4] Quantum spin Hall effect and topological phase transition in HgTe quantum wells [J].

Bernevig, B. Andrei ;

Hughes, Taylor L. ;

Zhang, Shou-Cheng .

SCIENCE, 2006, 314 (5806) :1757-1761

[5] Interaction constants and dynamic conductance of a gated wire [J].

Blanter, YM ;

Hekking, FWJ ;

Buttiker, M .

PHYSICAL REVIEW LETTERS, 1998, 81 (09) :1925-1928

[6] Electron quantum optics in ballistic chiral conductors [J].

Bocquillon, Erwann ;

Freulon, Vincent ;

Parmentier, Francois D. ;

Berroir, Jean-Marc ;

Placais, Bernard ;

Wahl, Claire ;

Rech, Jerome ;

Jonckheere, Thibaut ;

Martin, Thierry ;

Grenier, Charles ;

Ferraro, Dario ;

Degiovanni, Pascal ;

Feve, Gwendal .

ANNALEN DER PHYSIK, 2014, 526 (1-2) :1-30

[7] GENERALIZED MANY-CHANNEL CONDUCTANCE FORMULA WITH APPLICATION TO SMALL RINGS [J].

BUTTIKER, M ;

IMRY, Y ;

LANDAUER, R ;

PINHAS, S .

PHYSICAL REVIEW B, 1985, 31 (10) :6207-6215

[8] Time-dependent transport in mesoscopic structures [J].

Büttiker, M .

JOURNAL OF LOW TEMPERATURE PHYSICS, 2000, 118 (5-6) :519-542

[9] Time-resolved pure spin fractionalization and spin-charge separation in helical Luttinger liquid based devices [J].

Calzona, Alessio ;

Carrega, Matteo ;

Dolcetto, Giacomo ;

Sassetti, Maura .

PHYSICAL REVIEW B, 2015, 92 (19)

[10] Electron injection in a nanotube:: Noise correlations and entanglement -: art. no. 205408 [J].

Crépieux, A ;

Guyon, R ;

Devillard, P ;

Martin, T .

PHYSICAL REVIEW B, 2003, 67 (20)

← 1 2 3 4 5 6 →