Quantum Hall ferromagnetism in a two-valley strained Si quantum well

K. Lai; W. Pan; D. C. Tsui; S. Lyon; M. Mühlberger; F. Schäffler

doi:10.1016/j.physe.2006.03.009

Quantum Hall ferromagnetism in a two-valley strained Si quantum well

K. Lai, W. Pan, D. C. Tsui, S. Lyon, M. Mühlberger, F. Schäffler

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

3 Scopus citations

Abstract

Tilted field magnetotransport study was performed in a two-valley strained Si quantum well and hysteretic diagonal resistance spikes were observed near the coincidence angles. The spike around filling factor ν = 3 develops into a giant feature when it moves to the high-field edge of the quantum Hall (QH) state and quenches for higher tilt angles. When the spike is most prominent, its peak resistance is temperature independent from T∼20 mK up to 0.3 K, which is different from the critical behavior previously reported near the Curie temperature of the QH ferromagnet in AlAs quantum wells. Our data suggest a strong interplay between spins and valleys near the coincidence.

Original language	English (US)
Pages (from-to)	176-178
Number of pages	3
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	34
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physe.2006.03.009
State	Published - Aug 2006

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

Keywords

Quantum Hall ferromagnetism
Si quantum well
Valley degeneracy

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10.1016/j.physe.2006.03.009

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title = "Quantum Hall ferromagnetism in a two-valley strained Si quantum well",

abstract = "Tilted field magnetotransport study was performed in a two-valley strained Si quantum well and hysteretic diagonal resistance spikes were observed near the coincidence angles. The spike around filling factor ν = 3 develops into a giant feature when it moves to the high-field edge of the quantum Hall (QH) state and quenches for higher tilt angles. When the spike is most prominent, its peak resistance is temperature independent from T∼20 mK up to 0.3 K, which is different from the critical behavior previously reported near the Curie temperature of the QH ferromagnet in AlAs quantum wells. Our data suggest a strong interplay between spins and valleys near the coincidence.",

keywords = "Quantum Hall ferromagnetism, Si quantum well, Valley degeneracy",

author = "K. Lai and W. Pan and Tsui, {D. C.} and S. Lyon and M. M{\"u}hlberger and F. Sch{\"a}ffler",

note = "Funding Information: We thank Y. Chen, M. Shayegan for fruitful discussions. This work is supported by AFOSR and NSF. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under contract No. DE-AC04-94AL85000. The experiments were performed at the National High Magnetic Field Laboratory in Tallahassee, FL. We thank E. Palm and T. Murphy for their technical assistance. ",

year = "2006",

month = aug,

doi = "10.1016/j.physe.2006.03.009",

language = "English (US)",

volume = "34",

pages = "176--178",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

publisher = "Elsevier B.V.",

number = "1-2",

}

TY - JOUR

T1 - Quantum Hall ferromagnetism in a two-valley strained Si quantum well

AU - Lai, K.

AU - Pan, W.

AU - Tsui, D. C.

AU - Lyon, S.

AU - Mühlberger, M.

AU - Schäffler, F.

N1 - Funding Information: We thank Y. Chen, M. Shayegan for fruitful discussions. This work is supported by AFOSR and NSF. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under contract No. DE-AC04-94AL85000. The experiments were performed at the National High Magnetic Field Laboratory in Tallahassee, FL. We thank E. Palm and T. Murphy for their technical assistance.

PY - 2006/8

Y1 - 2006/8

N2 - Tilted field magnetotransport study was performed in a two-valley strained Si quantum well and hysteretic diagonal resistance spikes were observed near the coincidence angles. The spike around filling factor ν = 3 develops into a giant feature when it moves to the high-field edge of the quantum Hall (QH) state and quenches for higher tilt angles. When the spike is most prominent, its peak resistance is temperature independent from T∼20 mK up to 0.3 K, which is different from the critical behavior previously reported near the Curie temperature of the QH ferromagnet in AlAs quantum wells. Our data suggest a strong interplay between spins and valleys near the coincidence.

AB - Tilted field magnetotransport study was performed in a two-valley strained Si quantum well and hysteretic diagonal resistance spikes were observed near the coincidence angles. The spike around filling factor ν = 3 develops into a giant feature when it moves to the high-field edge of the quantum Hall (QH) state and quenches for higher tilt angles. When the spike is most prominent, its peak resistance is temperature independent from T∼20 mK up to 0.3 K, which is different from the critical behavior previously reported near the Curie temperature of the QH ferromagnet in AlAs quantum wells. Our data suggest a strong interplay between spins and valleys near the coincidence.

KW - Quantum Hall ferromagnetism

KW - Si quantum well

KW - Valley degeneracy

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VL - 34

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EP - 178

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-2

ER -

Quantum Hall ferromagnetism in a two-valley strained Si quantum well

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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