Preferred number of flipped spins in Skyrmion excitation

N. Kumada; A. Sawada; Z. F. Ezawa; H. Azuhata; S. Nagahama; K. Muraki; T. Saku; Y. Hirayama

doi:10.1016/S0921-4526(01)00294-0

Preferred number of flipped spins in Skyrmion excitation

N. Kumada, A. Sawada, Z. F. Ezawa, H. Azuhata, S. Nagahama, K. Muraki, T. Saku, Y. Hirayama

Research output: Contribution to journal › Article › peer-review

Abstract

We measured the activation energy of the Skyrmion excitations in the monolayer quantum Hall (QH) state at the Landau-level filling factor ν = 1 and in the bilayer QH state at ν = 2. The number of flipped spins N_s changes from 7 to 1 in the monolayer sample and in the bilayer sample with small tunneling energy gap, while N_s changes from 14 to 7 and finally to 1 in the bilayer sample with large tunneling energy gap. These experimental data suggest the existence of the preferred number of flipped spins N_s = 7 for a Skyrmion-pair excitation.

Original language	English
Pages (from-to)	169-172
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	298
Issue number	1-4
DOIs	https://doi.org/10.1016/S0921-4526(01)00294-0
Publication status	Published - 2001 Apr
Externally published	Yes

Keywords

GaAs/AlGaAs
Quantum Hall effect
Skyrmion

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/S0921-4526(01)00294-0

Cite this

@article{4768546df7bd413dbd28a7e4cd0c4054,

title = "Preferred number of flipped spins in Skyrmion excitation",

abstract = "We measured the activation energy of the Skyrmion excitations in the monolayer quantum Hall (QH) state at the Landau-level filling factor ν = 1 and in the bilayer QH state at ν = 2. The number of flipped spins Ns changes from 7 to 1 in the monolayer sample and in the bilayer sample with small tunneling energy gap, while Ns changes from 14 to 7 and finally to 1 in the bilayer sample with large tunneling energy gap. These experimental data suggest the existence of the preferred number of flipped spins Ns = 7 for a Skyrmion-pair excitation.",

keywords = "GaAs/AlGaAs, Quantum Hall effect, Skyrmion",

author = "N. Kumada and A. Sawada and Ezawa, {Z. F.} and H. Azuhata and S. Nagahama and K. Muraki and T. Saku and Y. Hirayama",

note = "Funding Information: The research was supported in part by Grant-in-Aids for the Scientific Research from the Ministry of Education, Science, Sports and Culture (10203201, 10640244, 11125203, 11304019), the Asahi Glass Foundation, CREST-JST and NEDO “NT-D-P-98” projects. ",

year = "2001",

month = apr,

doi = "10.1016/S0921-4526(01)00294-0",

language = "English",

volume = "298",

pages = "169--172",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

number = "1-4",

}

TY - JOUR

T1 - Preferred number of flipped spins in Skyrmion excitation

AU - Kumada, N.

AU - Sawada, A.

AU - Ezawa, Z. F.

AU - Azuhata, H.

AU - Nagahama, S.

AU - Muraki, K.

AU - Saku, T.

AU - Hirayama, Y.

N1 - Funding Information: The research was supported in part by Grant-in-Aids for the Scientific Research from the Ministry of Education, Science, Sports and Culture (10203201, 10640244, 11125203, 11304019), the Asahi Glass Foundation, CREST-JST and NEDO “NT-D-P-98” projects.

PY - 2001/4

Y1 - 2001/4

N2 - We measured the activation energy of the Skyrmion excitations in the monolayer quantum Hall (QH) state at the Landau-level filling factor ν = 1 and in the bilayer QH state at ν = 2. The number of flipped spins Ns changes from 7 to 1 in the monolayer sample and in the bilayer sample with small tunneling energy gap, while Ns changes from 14 to 7 and finally to 1 in the bilayer sample with large tunneling energy gap. These experimental data suggest the existence of the preferred number of flipped spins Ns = 7 for a Skyrmion-pair excitation.

AB - We measured the activation energy of the Skyrmion excitations in the monolayer quantum Hall (QH) state at the Landau-level filling factor ν = 1 and in the bilayer QH state at ν = 2. The number of flipped spins Ns changes from 7 to 1 in the monolayer sample and in the bilayer sample with small tunneling energy gap, while Ns changes from 14 to 7 and finally to 1 in the bilayer sample with large tunneling energy gap. These experimental data suggest the existence of the preferred number of flipped spins Ns = 7 for a Skyrmion-pair excitation.

KW - GaAs/AlGaAs

KW - Quantum Hall effect

KW - Skyrmion

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U2 - 10.1016/S0921-4526(01)00294-0

DO - 10.1016/S0921-4526(01)00294-0

M3 - Article

AN - SCOPUS:0035303448

VL - 298

SP - 169

EP - 172

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

SN - 0921-4526

IS - 1-4

ER -

Preferred number of flipped spins in Skyrmion excitation

Abstract

Keywords

ASJC Scopus subject areas

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