Ferroelectricity in an S=1/2 chain cuprate

被引：327

作者：

Park, S. ^{[1
]}

Choi, Y. J.

Zhang, C. L.

Cheong, S-W.

机构：

[1] Rutgers Ctr Emergent Mat, Piscataway, NJ 08854 USA

[2] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.98.057601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 P-c increases with H-c, and P-a appears with H-a. 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.

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页数：4

相关论文

共 30 条

[1] Collinear to spiral spin transformation without changing the modulation wavelength upon ferroelectric transition in Tb1-xDyxMnO3 [J].

Arima, T ;

Tokunaga, A ;

Goto, T ;

Kimura, H ;

Noda, Y ;

Tokura, Y .

PHYSICAL REVIEW LETTERS, 2006, 96 (09)

[2] STRUCTURE REFINEMENTS OF LICU2O2 AND LICU3O3 FROM NEUTRON POWDER DIFFRACTION DATA [J].

BERGER, R ;

ONNERUD, P ;

TELLGREN, R .

JOURNAL OF ALLOYS AND COMPOUNDS, 1992, 184 (02) :315-322

[3] NUMERICAL AND APPROXIMATE ANALYTICAL RESULTS FOR THE FRUSTRATED SPIN-1/2 QUANTUM SPIN CHAIN [J].

BURSILL, R ;

GEHRING, GA ;

FARNELL, DJJ ;

PARKINSON, JB ;

XIANG, T ;

ZENG, C .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1995, 7 (45) :8605-8618

[4] Ferroelectricity induced by acentric spin-density waves in YMn2O5 [J].

Chapon, LC ;

Radaelli, PG ;

Blake, GR ;

Park, S ;

Cheong, SW .

PHYSICAL REVIEW LETTERS, 2006, 96 (09)

[5] Comment on "Competition between helimagnetism and commensurate quantum spin correlations in LiCu2O2" -: art. no. 039705 [J].

Drechsler, SL ;

Málek, J ;

Richter, J ;

Moskvin, AS ;

Gippius, AA ;

Rosner, H .

PHYSICAL REVIEW LETTERS, 2005, 94 (03)

[6] Incommensurate helix magnetic order in quasi-1D chain cuprates LiCu2O2 and NaCu2O2 as seen by NMR [J].

Gippius, A. A. ;

Morozova, E. N. ;

Moskvin, A. S. ;

Drechsler, S. -L. ;

Baenitz, M. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2006, 300 (01) :E335-E338

[7] NMR and local-density-approximation evidence for spiral magnetic order in the chain cuprate LiCu2O2 -: art. no. 020406 [J].

Gippius, AA ;

Morozova, EN ;

Moskvin, AS ;

Zalessky, AV ;

Bush, AA ;

Baenitz, M ;

Rosner, H ;

Drechsler, SL .

PHYSICAL REVIEW B, 2004, 70 (02) :020406-1

[8] Ferroelectricity and giant magnetocapacitance in perovskite rare-earth manganites [J].

Goto, T ;

Kimura, T ;

Lawes, G ;

Ramirez, AP ;

Tokura, Y .

PHYSICAL REVIEW LETTERS, 2004, 92 (25) :257201-1

[9] Towards a microscopic model of magnetoelectric interactions in Ni3V2O8 [J].

Harris, A. B. ;

Yildirim, T. ;

Aharony, A. ;

Entin-Wohlman, O. .

PHYSICAL REVIEW B, 2006, 73 (18)

[10]

Hill NA, 2000, J PHYS CHEM B, V104, P6694, DOI 10.1021/jpc00114x