496 citations
- Seoul National UniversityKR7 papers
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Showing 2009Show all
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gr-qc2009★ 15 cited
De-Sitter nonlinear sigma model and accelerating universe
Joohan Lee, Tae Hoon Lee, Taeyoon Moon +1
We consider a cosmology with a non-compact nonlinear sigma model.The target space is of de-Sitter type and four scalar fields are introduced.The potential is absent but cosmologica…
cond-mat.str-el2009★ 21 cited
Oxygen vacancy induced re-entrant spin glass behavior in multiferroic ErMnO3 thin films
S. Y. Jang, D. Lee, J. -H. Lee +4
Epitaxial thin films of hexagonal ErMnO3 fabricated on Pt(111)/Al2O3(0001) and YSZ(111) substrates exhibited both ferroelectric character and magnetic ordering at low temperatures.…