Ferroelectricity in an S=1/2 chain cuprate

S. Park, Young Jai Choi, C. L. Zhang, S. W. Cheong

Research output: Contribution to journalArticle

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Abstract

We report our discovery of ferroelectricity in the spiral-magnetic state in the quantum quasi-one-dimensional (1D) S=1/2 magnet of LiCu2O2. Electric polarization (P) emerges along the c direction below the spiral-magnetic order temperature, but changes from the c to a axis when magnetic fields (H) are applied along the b direction. We also found that Pc increases with Hc, and Pa appears with Ha. LiCu2O2 in zero field appears to be the first ferroelectric cuprate and also a prototypical example of the "1D spiral-magnetic ferroelectrics." However, the unexpected behavior in H may demonstrate the complexity of the ordered spin configuration, inherent in the 1D S=1/2 magnet of LiCu2O2.

Original languageEnglish
Article number057601
JournalPhysical Review Letters
Volume98
Issue number5
DOIs
Publication statusPublished - 2007 Jan 31

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ferroelectricity
cuprates
magnets
polarization
configurations
magnetic fields
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Park, S. ; Choi, Young Jai ; Zhang, C. L. ; Cheong, S. W. / Ferroelectricity in an S=1/2 chain cuprate. In: Physical Review Letters. 2007 ; Vol. 98, No. 5.
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Ferroelectricity in an S=1/2 chain cuprate. / Park, S.; Choi, Young Jai; Zhang, C. L.; Cheong, S. W.

In: Physical Review Letters, Vol. 98, No. 5, 057601, 31.01.2007.

Research output: Contribution to journalArticle

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