Photoemission and x-ray absorption study of the two-dimensional triangular lattice superconductor Na0.35CoO2•1.3H2O -: art. no. 012508

被引：13

作者：

Kubota, M

Takada, K

Sasaki, T

Kumigashira, H

Okabayashi, J

Oshima, M

Suzuki, M

Kawamura, N

Takagaki, M

Fukuda, K

Ono, K ^{[1
]}

机构：

[1] High Energy Accelerator Res Org, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan

[2] Natl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan

[3] Japan Sci & Technol Corp, CREST, Tokyo, Japan

[4] Univ Tokyo, Dept Appl Chem, Bunkyo Ku, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.70.012508

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the electronic structure of a triangular lattice superconductor Na0.35CoO2.1.3H(2)O (T(c)similar to5 K) by photoemission and x-ray absorption spectroscopy. The Co 2p x-ray absorption and Co 2p-3d resonant photoemission clarified that the valence band near the Fermi level is mainly constructed by the narrow Co 3d t(2g) states at the binding energy of 1.0 eV with the low-spin configuration. In the resonant photoemission, Auger features coexist with the resonant enhancements, while the charge-transfer satellites are observed in the photoemission spectra of a Co 2p core levels. It is also expected that the narrow t(2g) band reflects on the importance of an electron-phonon coupling. Besides, O 1s and Co 1s x-ray absorption spectroscopy reveal that intercalated water condenses into a two-dimensional ice and showing no influence on a carrier doping.

引用

页码：012508 / 1

页数：4

共 26 条

[1] ELECTRONIC-STRUCTURE AND SPIN-STATE TRANSITION OF LACOO3 [J].

ABBATE, M ;

FUGGLE, JC ;

FUJIMORI, A ;

TJENG, LH ;

CHEN, CT ;

POTZE, R ;

SAWATZKY, GA ;

EISAKI, H ;

UCHIDA, S .

PHYSICAL REVIEW B, 1993, 47 (24) :16124-16130

[2] RESONANT PHOTOEMISSION-STUDY OF ND2-XCEXCUO4-Y - NATURE OF ELECTRONIC STATES NEAR THE FERMI LEVEL [J].

ALLEN, JW ;

OLSON, CG ;

MAPLE, MB ;

KANG, JS ;

LIU, LZ ;

PARK, JH ;

ANDERSON, RO ;

ELLIS, WP ;

MARKERT, JT ;

DALICHAOUCH, Y ;

LIU, R .

PHYSICAL REVIEW LETTERS, 1990, 64 (05) :595-598

[3] RESONATING VALENCE BONDS - NEW KIND OF INSULATOR [J].

ANDERSON, PW .

MATERIALS RESEARCH BULLETIN, 1973, 8 (02) :153-160

[4] Electronic model for CoO2 layer based systems:: Chiral resonating valence bond metal and superconductivity -: art. no. 097003 [J].

Baskaran, G .

PHYSICAL REVIEW LETTERS, 2003, 91 (09)

[5] OXYGEN-1S AND COBALT-2P X-RAY ABSORPTION OF COBALT OXIDES [J].

DEGROOT, FMF ;

ABBATE, M ;

VANELP, J ;

SAWATZKY, GA ;

MA, YJ ;

CHEN, CT ;

SETTE, F .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1993, 5 (14) :2277-2288

[6] Fermi surface and quasiparticle dynamics of Na0.7CoO2 investigated by angle-resolved photoemission spectroscopy -: art. no. 246402 [J].

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 .

PHYSICAL REVIEW LETTERS, 2004, 92 (24) :246402-1

[7]

HIGEMOTO W, CONDMAT0310324

[8] IMAGING THE CONDENSATION AND EVAPORATION OF MOLECULARLY THIN-FILMS OF WATER WITH NANOMETER RESOLUTION [J].

HU, J ;

XIAO, XD ;

OGLETREE, DF ;

SALMERON, M .

SCIENCE, 1995, 268 (5208) :267-269

[9] RESONANT PHOTOEMISSION-STUDY OF SUPERCONDUCTING Y-BA-CU-O [J].

KURTZ, RL ;

STOCKBAUER, RL ;

MUELLER, D ;

SHIH, A ;

TOTH, LE ;

OSOFSKY, M ;

WOLF, SA .

PHYSICAL REVIEW B, 1987, 35 (16) :8818-8820

[10] Photoemission and x-ray-absorption study of misfit-layered (Bi,Pb)-Sr-Co-O compounds: Electronic structure of a hole-doped Co-O triangular lattice [J].

Mizokawa, T ;

Tjeng, LH ;

Steeneken, PG ;

Brookes, NB ;

Tsukada, I ;

Yamamoto, T ;

Uchinokura, K .

PHYSICAL REVIEW B, 2001, 64 (11)

← 1 2 3 →