Observation of gapped quasiparticles in sodium charge-ordered Na1/2CoO2

Xia Y; Qian D; Hsieh D; Wray L; Viciu L; Cava RJ; Hasan MZ

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Observation of gapped quasiparticles in sodium charge-ordered Na1/2CoO2

机译：钠电荷排序的Na1 / 2CoO2中带隙准粒子的观察

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Using high-resolution photoemission spectroscopy (ARPES), we present a systematic study of the insulating cobaltates. A single-particle gap opening suggests that due to the material's unique topology an anisotropic particle-hole instability is present. Unlike conventional density waves, charge stripes or band insulators, the onset of the gap depends on the quasiparticle's quantum coherence which occurs well below the symmetry-breaking temperature of the crystal. Results are found to be in good agreement with bulk resistivity, specific heat and optical measurements. (c) 2007 Elsevier B.V. All rights reserved.

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《Physica, B. Condensed Matter》 |2008年第9期|共3页
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Xia Y; Qian D; Hsieh D; Wray L; Viciu L; Cava RJ; Hasan MZ;
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Mott insulator; sodium cobaltate; metal-insulator transition; triangular lattice; frustrated systems; TRANSITIONS;

机译：莫特绝缘子;钴酸钠;金属-绝缘体过渡;三角形晶格;受挫系统;过渡;

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1. Observation of gapped quasiparticles in sodium charge-ordered Na1/2CoO2 [J] . Xia Y, Qian D, Hsieh D, Physica, B. Condensed Matter . 2008,第5a9期

机译：钠电荷排序的Na1 / 2CoO2中带隙准粒子的观察
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机译：NaxCoO2中金属-绝缘体转变附近的带隙准粒子的观察
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Observation of gapped quasiparticles in sodium charge-ordered Na1/2CoO2

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