Quantum Hall skyrmions with higher topological charge

被引:24
作者
Lilliehook, D [1 ]
Lejnell, K [1 ]
Karlhede, A [1 ]
Sondhi, SL [1 ]
机构
[1] PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08544
来源
PHYSICAL REVIEW B | 1997年 / 56卷 / 11期
关键词
D O I
10.1103/PhysRevB.56.6805
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We have investigated quantum Hall Skyrmions at filling factor v=1 carrying more than one unit of topological, and hence electric, charge. Using a combination of analytic and numerical methods we find the counterintuitive result that when the Zeeman energy is tuned to values much smaller than the interaction energy [g mu(B)/(e(2)/epsilon l)<8.4x10(-5)], the creation energy of a charge two Skyrmion becomes less than twice the creation energy of a charge one Skyrmion, i.e., Skyrmions bind in pairs. The doubly charged Skyrmions are stable to further accretion of charge and exhibit a 10% larger spin per unit charge than charge one Skyrmions which would, in principle, signal this pairing.
引用
收藏
页码:6805 / 6809
页数:5
相关论文
共 15 条
[1]   Evidence of Skyrmion excitations about nu=1 in n-modulation-doped single quantum wells by interband optical transmission [J].
Aifer, EH ;
Goldberg, BB ;
Broido, DA .
PHYSICAL REVIEW LETTERS, 1996, 76 (04) :680-683
[2]   OPTICALLY PUMPED NMR EVIDENCE FOR FINITE-SIZE SKYRMIONS IN GAAS QUANTUM-WELLS NEAR LANDAU-LEVEL FILLING NU=1 [J].
BARRETT, SE ;
DABBAGH, G ;
PFEIFFER, LN ;
WEST, KW ;
TYCKO, R .
PHYSICAL REVIEW LETTERS, 1995, 74 (25) :5112-5115
[3]   CHARGED SPIN-TEXTURE EXCITATIONS AND THE HARTREE-FOCK APPROXIMATION IN THE QUANTUM HALL-EFFECT [J].
FERTIG, HA ;
BREY, L ;
COTE, R ;
MACDONALD, AH .
PHYSICAL REVIEW B, 1994, 50 (15) :11018-11021
[4]  
FERTIG HA, 1997, PHYS REV B, V55, P10611
[5]   BOSON-VORTEX-SKYRMION DUALITY, SPIN-SINGLET FRACTIONAL QUANTUM HALL-EFFECT, AND SPIN-1/2 ANYON SUPERCONDUCTIVITY [J].
LEE, DH ;
KANE, CL .
PHYSICAL REVIEW LETTERS, 1990, 64 (12) :1313-1317
[6]  
LEJNELL K, 1996, THESIS STOCKHOLM U
[7]  
LEJNELL K, UNPUB
[8]   Spin excitations of a two-dimensional electron gas in the limit of vanishing Lande g factor [J].
Maude, DK ;
Potemski, M ;
Portal, JC ;
Henini, M ;
Eaves, L ;
Hill, G ;
Pate, MA .
PHYSICAL REVIEW LETTERS, 1996, 77 (22) :4604-4607
[9]  
NAZAROV YV, UNPUB
[10]  
Rajaraman R., 1982, SOLITONS INSTANTONS