Collapse of the fractional quantum Hall state by a unidirectional periodic potential modulation

被引：4

作者：

Endo, A. ^{[1
]}

Shibata, N. ^{[2
]}

Iye, Y. ^{[1
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

[2] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2010年 / 42卷 / 04期

关键词：

Fractional quantum Hall effect; Lateral superlattice; Stripe phase; Composite fermions; COMPOSITE FERMIONS; GROUND-STATE; ELECTRONS;

D O I：

10.1016/j.physe.2009.10.024

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We have investigated the effect of unidirectional periodic potential modulation on the fractional quantum Hall (FQH) states located within the filling factor range 1 < nu < 2. We find that odd-numerator FQH states are strongly suppressed, while the even-numerator ones are less affected or even enhanced, by the introduction of the modulation. In the picture of the composite fermions (CFs), the behaviors are equivalent to the suppression of the spin splitting of the CFs by the modulation. We discuss the origin of the suppression and the possible modulation-induced phase transition from the FQH state to the stripe state. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1042 / 1045

页数：4

共 24 条

[1]

Chakraborty T., 1995, The Quantum Hall Effects: Integral and Fractional, V2nd

[2] SPIN CONFIGURATIONS AND QUASIPARTICLE FRACTIONAL CHARGE OF FRACTIONAL-QUANTUM-HALL-EFFECT GROUND-STATES IN THE N = O LANDAU-LEVEL [J].

CLARK, RG ;

HAYNES, SR ;

SUCKLING, AM ;

MALLETT, JR ;

WRIGHT, PA ;

HARRIS, JJ ;

FOXON, CT .

PHYSICAL REVIEW LETTERS, 1989, 62 (13) :1536-1539

[3] FRACTIONAL QUANTUM HALL-EFFECT AROUND NU=3/2 - COMPOSITE FERMIONS WITH A SPIN [J].

DU, RR ;

YEH, AS ;

STORMER, HL ;

TSUI, DC ;

PFEIFFER, LN ;

WEST, KW .

PHYSICAL REVIEW LETTERS, 1995, 75 (21) :3926-3929

[4] g factor of composite fermions around nu=2/3 from angular-dependent activation-energy measurements [J].

Du, RR ;

Yeh, AS ;

Stormer, HL ;

Tsui, DC ;

Pfeiffer, LN ;

West, KW .

PHYSICAL REVIEW B, 1997, 55 (12) :R7351-R7354

[5] Harmonic content of strain-induced potential modulation in unidirectional lateral superlattices [J].

Endo, A ;

Iye, Y .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2005, 74 (10) :2797-2805

[6]

Endo A, 2002, PHYS REV B, V66, DOI 10.1103/PhysRevB.66.075333

[7] Envelope of commensurability magnetoresistance oscillation in unidirectional lateral superlattices [J].

Endo, A ;

Katsumoto, S ;

Iye, Y .

PHYSICAL REVIEW B, 2000, 62 (24) :16761-16767

[8] Magnetotransport of ν=3/2 composite fermions under periodic effective magnetic-field modulation -: art. no. 113310 [J].

Endo, A ;

Kawamura, M ;

Katsumoto, S ;

Iye, Y .

PHYSICAL REVIEW B, 2001, 63 (11)

[9]

Endo A., UNPUB

[10]

ENDO A, J PHYS SOC JPN UNPUB

← 1 2 3 →