Doubly enhanced Skyrmions in v = 2 bilayer quantum Hall states

Norio Kumada; Anju Sawada; Zyun F. Ezawa; Satoshi Nagahama; Hirofumi Azuhata; Koji Muraki; Tadashi Saku; Yoshiro Hirayama

doi:10.1143/JPSJ.69.3178

Doubly enhanced Skyrmions in v = 2 bilayer quantum Hall states

Norio Kumada, Anju Sawada, Zyun F. Ezawa, Satoshi Nagahama, Hirofumi Azuhata, Koji Muraki, Tadashi Saku, Yoshiro Hirayama

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

20 Citations (Scopus)

Abstract

Skyrmion excitations were measured and compared for the first time in the bilayer quantum Hall (QH) state at the Landau-level filling factor v = 2 and in the monolayer QH state at v = 1. The observed number of flipped spins, N_spin, is 14 in the bilayer sample with a large tunnelling gap, and N_spin = 7 in the bilayer sample with a small tunnelling gap, while it is N_spin = 7 in the monolayer sample. The difference is interpreted to be due to the iriterlayer exchange interaction.

Original language	English
Pages (from-to)	3178-3181
Number of pages	4
Journal	journal of the physical society of japan
Volume	69
Issue number	10
DOIs	https://doi.org/10.1143/JPSJ.69.3178
Publication status	Published - 2000 Oct
Externally published	Yes

Keywords

Exchange interactions
Magnetotransport
Quantum Hall effect
Semiconductor
Skyrmion

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.69.3178

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title = "Doubly enhanced Skyrmions in v = 2 bilayer quantum Hall states",

abstract = "Skyrmion excitations were measured and compared for the first time in the bilayer quantum Hall (QH) state at the Landau-level filling factor v = 2 and in the monolayer QH state at v = 1. The observed number of flipped spins, Nspin, is 14 in the bilayer sample with a large tunnelling gap, and Nspin = 7 in the bilayer sample with a small tunnelling gap, while it is Nspin = 7 in the monolayer sample. The difference is interpreted to be due to the iriterlayer exchange interaction.",

keywords = "Exchange interactions, Magnetotransport, Quantum Hall effect, Semiconductor, Skyrmion",

author = "Norio Kumada and Anju Sawada and Ezawa, {Zyun F.} and Satoshi Nagahama and Hirofumi Azuhata and Koji Muraki and Tadashi Saku and Yoshiro Hirayama",

year = "2000",

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doi = "10.1143/JPSJ.69.3178",

language = "English",

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TY - JOUR

T1 - Doubly enhanced Skyrmions in v = 2 bilayer quantum Hall states

AU - Kumada, Norio

AU - Sawada, Anju

AU - Ezawa, Zyun F.

AU - Nagahama, Satoshi

AU - Azuhata, Hirofumi

AU - Muraki, Koji

AU - Saku, Tadashi

AU - Hirayama, Yoshiro

PY - 2000/10

Y1 - 2000/10

N2 - Skyrmion excitations were measured and compared for the first time in the bilayer quantum Hall (QH) state at the Landau-level filling factor v = 2 and in the monolayer QH state at v = 1. The observed number of flipped spins, Nspin, is 14 in the bilayer sample with a large tunnelling gap, and Nspin = 7 in the bilayer sample with a small tunnelling gap, while it is Nspin = 7 in the monolayer sample. The difference is interpreted to be due to the iriterlayer exchange interaction.

AB - Skyrmion excitations were measured and compared for the first time in the bilayer quantum Hall (QH) state at the Landau-level filling factor v = 2 and in the monolayer QH state at v = 1. The observed number of flipped spins, Nspin, is 14 in the bilayer sample with a large tunnelling gap, and Nspin = 7 in the bilayer sample with a small tunnelling gap, while it is Nspin = 7 in the monolayer sample. The difference is interpreted to be due to the iriterlayer exchange interaction.

KW - Exchange interactions

KW - Magnetotransport

KW - Quantum Hall effect

KW - Semiconductor

KW - Skyrmion

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JF - Journal of the Physical Society of Japan

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Doubly enhanced Skyrmions in v = 2 bilayer quantum Hall states

Abstract

Keywords

ASJC Scopus subject areas

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