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  Microscopicmanifestation of the spin phase transition at filling factor 2/3

Verdene, B., Martin, J., Gamez, G., Smet, J., von Klitzing, K., Mahalu, D., et al. (2007). Microscopicmanifestation of the spin phase transition at filling factor 2/3. Nature Physics, 3(6), 392-396.

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Verdene, B., Author
Martin, J., Author
Gamez, G., Author
Smet, J.1, 2, Author           
von Klitzing, K.1, Author           
Mahalu, D., Author
Schuh, D., Author
Abstreiter, G., Author
Yacoby, A., Author
Affiliations:
1Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society, ou_3370504              
2Research Group Solid State Nanophysics (Jurgen H. Smet), Max Planck Institute for Solid State Research, Max Planck Society, ou_3370489              

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 Abstract: First-order phase transitions are known to be accompanied by hysteresis due to the formation of domains with different order parameters. As the transition is approached, the domain sizes increase to macroscopic dimensions. It is therefore natural to expect that hysteresis will be absent from samples of microscopic size. Here, we explore from a microscopic standpoint the hysteretic behaviour across the spin phase transition that occurs at filling nu = 2/3 in the fractional-quantum- Hall regime(1-5). Using a single-electron transistor, we follow the evolution of localized states across the spin transition by measuring the local compressibility. Localized-state spectra clearly reveal the hysteretic behaviour accompanying the transition. Using electrostatic gating we continuously vary the size of the sample undergoing the phase transition. For submicrometre dimensions the hysteresis disappears, indicating domain sizes in excess of 500 nm.

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Language(s): eng - English
 Dates: 2007
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 338617
ISI: 000247344400013
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Title: Nature Physics
Source Genre: Journal
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Pages: - Volume / Issue: 3 (6) Sequence Number: - Start / End Page: 392 - 396 Identifier: ISSN: 1745-2473