Quantum transport study of canted antiferromagnetic phase in the ν = 2 bilayer quantum Hall state

Akira Fukuda, Shinsuke Kozumi, Daiju Terasawa, Yuichi Shimoda, Norio Kumada, Yoshiro Hirayama, Zyun F. Ezawa, Anju Sawada

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We examine the ν = 2 bilayer quantum Hall (QH) state in clean two-dimensional electron systems (2DESs) to study effects due to not only the layer degree of freedom called pseudospin but also the real spin degree of freedom. The novel canted antiferromagnetic phase (CAF phase) has been predicted to emerge from subtle many-body electron interactions between the singlet (S) and ferromagnet (F) phases. Though several experiments indicate an onset of the CAF phase, a systematic transport study is not yet to be demonstrated. We have carried out magnetotransport measurements of the ν = 2 bilayer QH state using a sample with tunneling energy ΔSAS = 11 K. Activation energy was precisely measured as a function of the total density of the 2DES and the density difference between the two layers. Results support an appearance of the CAF phase between the S and F phases.

Original languageEnglish
Pages (from-to)77-80
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number1-2
Publication statusPublished - 2006 Aug
Externally publishedYes


  • Bilayer system
  • Canted antiferromagnetic phase
  • Quantum Hall effect

ASJC Scopus subject areas

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


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