Charge ordering and magnetopolarons in Na0.82CoO2 -: art. no. 167003

被引：71

作者：

Bernhard, C ^{[1
]}

Boris, AV ^{[1
]}

Kovaleva, NN ^{[1
]}

Khaliullin, G ^{[1
]}

Pimenov, AV ^{[1
]}

Yu, L ^{[1
]}

Chen, DP ^{[1
]}

Lin, CT ^{[1
]}

Keimer, B ^{[1
]}

机构：

[1] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.93.167003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using spectral ellipsometry, we measured the dielectric function of a Na0.82(2)CoO2 crystal that exhibits bulk antiferromagnetism with T-N=19.8 K. We identify two prominent transitions as a function of temperature. The first one at 280 K involves marked changes of the electronic and lattice responses that are indicative of charge ordering in the CoO2 layers. The second transition occurs around T-N=19.8 K and reveals sizable spin-charge coupling. The data are discussed in terms of charge ordering and formation of magnetopolarons due to a charge-induced spin-state transition of adjacent Co3+ ions.

引用

页码：167003 / 1

页数：4

共 31 条

[1] Bulk antiferromagnetism in Na0.82CoO2 single crystals -: art. no. 100410
Bayrakci, SP
Bernhard, C
Chen, DP
Keimer, B
Kremer, RK
Lemmens, P
Lin, CT
Niedermayer, C
Strempfer, J
[J]. PHYSICAL REVIEW B, 2004, 69 (10):
[2] Far-infrared ellipsometry using a synchrotron light source -: the dielectric response of the cuprate high Tc superconductors
Bernhard, C
Humlícek, J
Keimer, B
[J]. THIN SOLID FILMS, 2004, 455 : 143 - 149
[3] Calvani P, 2001, RIV NUOVO CIMENTO, V24, P1
[4] Unconventional superconductivity and electron correlations in the cobalt oxyhydrate Na0.35CoO2•yH2O from nuclear quadrupole resonance -: art. no. 047004
Fujimoto, T
Zheng, GQ
Kitaoka, Y
Meng, RL
Cmaidalka, J
Chu, CW
[J]. PHYSICAL REVIEW LETTERS, 2004, 92 (04) : 4
[5] Unconventional charge ordering in Na0.70CoO2 below 300 K -: art. no. 100404
Gavilano, JL
Rau, D
Pedrini, B
Hinderer, J
Ott, HR
Kazakov, SM
Karpinski, J
[J]. PHYSICAL REVIEW B, 2004, 69 (10)
[6] THE DYNAMICS OF CHARGE-DENSITY WAVES
GRUNER, G
[J]. REVIEWS OF MODERN PHYSICS, 1988, 60 (04) : 1129 - 1182
[7] Fermi surface and quasiparticle dynamics of Na0.7CoO2 investigated by angle-resolved photoemission spectroscopy -: art. no. 246402
Hasan, MZ
Chuang, YD
Qian, D
Li, YW
Kong, Y
Kuprin, A
Fedorov, AV
Kimmerling, R
Rotenberg, E
Rossnagel, K
Hussain, Z
Koh, H
Rogado, NS
Foo, ML
Cava, RJ
[J]. PHYSICAL REVIEW LETTERS, 2004, 92 (24) : 246402 - 1
[8] Crystal structure of the sodium cobaltate deuterate superconductor NaxCoO2•4xD2O (x≈1/3) -: art. no. 214517
Jorgensen, JD
Avdeev, M
Hinks, DG
Burley, JC
Short, S
[J]. PHYSICAL REVIEW B, 2003, 68 (21):
[9] INTERBAND-TRANSITIONS IN YBA2CU3O7
KIRCHER, J
HUMLICEK, J
GARRIGA, M
CARDONA, M
FUCHS, D
HABERMEIER, HU
JEPSEN, O
GOPALAN, S
ANDERSEN, OK
FANG, Y
WELP, U
VANDERVOORT, KG
CRABTREE, GW
[J]. PHYSICA C, 1992, 192 (3-4): : 473 - 480
[10] LEMMENS P, CONDMAT0309186

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