The observation of gapped quasiparticles near the metal-insulator transition in Nax CoO2

Y. Xia; D. Qian; D. Hsieh; L. Wray; M. Z. Hasan; L. Viciu; R. J. Cava

doi:10.1016/j.jpcs.2008.06.110

The observation of gapped quasiparticles near the metal-insulator transition in Na_x CoO₂

Y. Xia, D. Qian, D. Hsieh, L. Wray, M. Z. Hasan, L. Viciu, R. J. Cava

Research output: Contribution to journal › Article › peer-review

Abstract

Utilizing high-resolution photoemission spectroscopy (ARPES) with fine-tuned polarization selection we present a systematic study of the insulating cobaltates. A single-particle gap opening is observed, suggesting an anisotropic particle-hole instability is present due to the material's unique topology. 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.

Original language	English (US)
Pages (from-to)	2986-2988
Number of pages	3
Journal	Journal of Physics and Chemistry of Solids
Volume	69
Issue number	12
DOIs	https://doi.org/10.1016/j.jpcs.2008.06.110
State	Published - Dec 2008

All Science Journal Classification (ASJC) codes

General Chemistry
General Materials Science
Condensed Matter Physics

Keywords

C. Photoelectron spectroscopy
D. Fermi surface
D. Spin-density waves

Access to Document

10.1016/j.jpcs.2008.06.110

Cite this

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title = "The observation of gapped quasiparticles near the metal-insulator transition in Nax CoO2",

abstract = "Utilizing high-resolution photoemission spectroscopy (ARPES) with fine-tuned polarization selection we present a systematic study of the insulating cobaltates. A single-particle gap opening is observed, suggesting an anisotropic particle-hole instability is present due to the material's unique topology. 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.",

keywords = "C. Photoelectron spectroscopy, D. Fermi surface, D. Spin-density waves",

author = "Y. Xia and D. Qian and D. Hsieh and L. Wray and Hasan, {M. Z.} and L. Viciu and Cava, {R. J.}",

note = "Funding Information: This work is supported by DOE/DE-FG02-05ER46200. ALS is supported by DOE/BES-DE-AC03-76SF00098. ",

year = "2008",

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doi = "10.1016/j.jpcs.2008.06.110",

language = "English (US)",

volume = "69",

pages = "2986--2988",

journal = "Journal of Physics and Chemistry of Solids",

issn = "0022-3697",

publisher = "Elsevier Ltd",

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TY - JOUR

T1 - The observation of gapped quasiparticles near the metal-insulator transition in Nax CoO2

AU - Xia, Y.

AU - Qian, D.

AU - Hsieh, D.

AU - Wray, L.

AU - Hasan, M. Z.

AU - Viciu, L.

AU - Cava, R. J.

N1 - Funding Information: This work is supported by DOE/DE-FG02-05ER46200. ALS is supported by DOE/BES-DE-AC03-76SF00098.

PY - 2008/12

Y1 - 2008/12

N2 - Utilizing high-resolution photoemission spectroscopy (ARPES) with fine-tuned polarization selection we present a systematic study of the insulating cobaltates. A single-particle gap opening is observed, suggesting an anisotropic particle-hole instability is present due to the material's unique topology. 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.

AB - Utilizing high-resolution photoemission spectroscopy (ARPES) with fine-tuned polarization selection we present a systematic study of the insulating cobaltates. A single-particle gap opening is observed, suggesting an anisotropic particle-hole instability is present due to the material's unique topology. 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.

KW - C. Photoelectron spectroscopy

KW - D. Fermi surface

KW - D. Spin-density waves

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