Low-lying electronic structure of triangular cobaltite

被引：3

作者：

Kuprin, AP ^{[1
]}

Hasan, MZ

Chuang, YD

Qian, D

Foo, M

Cava, RJ

机构：

[1] Lawrence Berkeley Natl Lab, Adv Light Source, Stanford, CA 94305 USA

[2] Princeton Univ, Dept Phys, Joseph Henry Labs, Princeton, NJ 08544 USA

[3] PMI, Princeton Ctr Complex Mat, Princeton, NJ 08544 USA

[4] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2006年 / 67卷 / 1-3期

关键词：

oxides; superconductors; photoelectron spectroscopy; electronic structure; Fermi surface;

D O I：

10.1016/j.jpcs.2005.10.158

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report detailed Fermi surface topology and quasiparticle dynamics of the host cobaltate Na0.7CoO2. A direct mapping of the Fermi surface is carried out by angle-resolved photoemission spectroscopy (ARPES). Fermi surface at 16 K is a hole-pocket centered around the F-point. A highly correlated nature of the electron liquid in this system is evidenced from strong on-site Coulomb interaction seen through a valence satellite and via renormalization of the quasiparticle dispersion. The quasiparticle band disperses less than 100 meV and exists in the T-linear regime of resistivity up to 120 K. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：235 / 238

页数：4

共 10 条

[1] RESONATING VALENCE BONDS - NEW KIND OF INSULATOR
ANDERSON, PW
[J]. MATERIALS RESEARCH BULLETIN, 1973, 8 (02) : 153 - 160
[2] Specific-heat evidence for strong electron correlations in the thermoelectric material (Na,Ca) Co2O4
Ando, Y
Miyamoto, N
Segawa, K
Kawata, T
Terasaki, I
[J]. PHYSICAL REVIEW B, 1999, 60 (15) : 10580 - 10583
[3] Angle-resolved photoemission studies of the cuprate superconductors
Damascelli, A
Hussain, Z
Shen, ZX
[J]. REVIEWS OF MODERN PHYSICS, 2003, 75 (02) : 473 - 541
[4] 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
[5] Electronic structure of NaCo2O4
Singh, DJ
[J]. PHYSICAL REVIEW B, 2000, 61 (20) : 13397 - 13402
[6] Quantum critical behavior and possible triplet superconductivity in electron-doped CoO2 sheets -: art. no. 020503
Singh, DJ
[J]. PHYSICAL REVIEW B, 2003, 68 (02)
[7] Superconductivity in two-dimensional CoO2 layers
Takada, K
Sakurai, H
Takayama-Muromachi, E
Izumi, F
Dilanian, RA
Sasaki, T
[J]. NATURE, 2003, 422 (6927) : 53 - 55
[8] TERASAKI J, 1997, PHYS REV B, V56, P12685
[9] Doped t-J model on a triangular lattice:: Possible application to NaxCoO2•yH2O and Na1-xTiO2 -: art. no. 092504
Wang, QH
Lee, DH
Lee, PA
[J]. PHYSICAL REVIEW B, 2004, 69 (09)
[10] Spin entropy as the likely source of enhanced thermopower in NaxCo2O4
Wang, YY
Rogado, NS
Cava, RJ
Ong, NP
[J]. NATURE, 2003, 423 (6938) : 425 - 428

← 1 →