Evidence for suppressed screening on the surface of high temperature La2-xSrxCuO4 and Nd2-xCexCuO4 superconductors -: art. no. 177002

被引：95

作者：

Taguchi, M ^{[1
]}

Chainani, A

Horiba, K

Takata, Y

Yabashi, M

Tamasaku, K

Nishino, Y

Miwa, D

Ishikawa, T

Takeuchi, T

Yamamoto, K

Matsunami, M

Shin, S

Yokoya, T

Ikenaga, E

Kobayashi, K

Mochiku, T

Hirata, K

Hori, J

Ishii, K

Nakamura, F

Suzuki, T

机构：

[1] RIKEN, SPring8, Soft Xray Spect Lab, Mikazuki, Hyogo 6795148, Japan

[2] RIKEN, SPring8, Coherent Xray Opt Lab, Mikazuki, Hyogo 6795148, Japan

[3] JASRI, SPring8, Mikazuki, Hyogo 6795198, Japan

[4] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[5] Natl Inst Mat Sci, Superconducting Mat Ctr, Tsukuba, Ibaraki 3050047, Japan

[6] Hiroshima Univ, ADSM, Dept Quantum Matter, Higashihiroshima, Hiroshima 7398530, Japan

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.95.177002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Hard x-ray photoemission spectroscopy (PES) of Cu core electronic states, with a probing depth of similar to 60 angstrom, is used to show that the Zhang-Rice singlet feature is present in La2CuO4 but is absent in Nd2CuO4. Hole and electron doping in La2-xSrxCuO4 (LSCO) and Nd2-xCexCuO4 (NCCO) result in new well-screened features which are missing in soft x-ray PES. Impurity Anderson model calculations establish screening from doped states as its origin, which is strongly suppressed within 15 angstrom of the surface. Complemented with x-ray absorption spectroscopy, the small chemical-potential shift in core levels (similar to 0.2 eV) are shown to be consistent with modifications of valence and conduction band states spanning the band gap (similar to 1 eV) upon hole and electron doping in LSCO and NCCO.

引用

页数：4

共 33 条

[1] ELECTRONIC-STRUCTURE STUDIES ON THE N-TYPE DOPED SUPERCONDUCTORS R2-XMXCUO4-DELTA (R=PR,ND,SM-M=CE,TH) AND ND2CUO4-XFX BY ELECTRON-ENERGY-LOSS SPECTROSCOPY [J].

ALEXANDER, M ;

ROMBERG, H ;

NUCKER, N ;

ADELMANN, P ;

FINK, J ;

MARKERT, JT ;

MAPLE, MB ;

UCHIDA, S ;

TAKAGI, H ;

TOKURA, Y ;

JAMES, ACWP ;

MURPHY, DW .

PHYSICAL REVIEW B, 1991, 43 (01) :333-343

[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] High-resolution x-ray-photoemission study of single crystalline Sr2CuO2Cl2 [J].

Boske, T ;

Knauff, O ;

Neudert, R ;

Kielwein, M ;

Knupfer, M ;

Golden, MS ;

Fink, J ;

Eisaki, H ;

Uchida, S ;

Okada, K ;

Kotani, A .

PHYSICAL REVIEW B, 1997, 56 (06) :3438-3446

[4] High-energy Ce-3d photoemission:: Bulk properties of CeM2 (M = Fe,Co,Ni) and Ce7Ni3 [J].

Braicovich, L ;

Brookes, NB ;

Dallera, C ;

Salvietti, M ;

Olcese, GL .

PHYSICAL REVIEW B, 1997, 56 (23) :15047-15055

[5] ELECTRONIC STATES IN LA2-XSRXCUO4+GAMMA PROBED BY SOFT-X-RAY ABSORPTION [J].

CHEN, CT ;

SETTE, F ;

MA, Y ;

HYBERTSEN, MS ;

STECHEL, EB ;

FOULKES, WMC ;

SCHLUTER, M ;

CHEONG, SW ;

COOPER, AS ;

RUPP, LW ;

BATLOGG, B ;

SOO, YL ;

MING, ZH ;

KROL, A ;

KAO, YH .

PHYSICAL REVIEW LETTERS, 1991, 66 (01) :104-107

[6]

Cox P. A., 1992, TRANSITION METAL OXI

[7] ELECTRON-ENERGY LEVELS IN ND2-XCEXCUO4 - A STUDY BY VALENCE-LEVEL AND CORE-LEVEL PHOTOEMISSION SPECTROSCOPY [J].

CUMMINS, TR ;

EGDELL, RG .

PHYSICAL REVIEW B, 1993, 48 (09) :6556-6568

[8]

DALLERA C, 2001, ESRF HIGHLIGHTS, P77

[9] ANOMALOUS TRANSFER OF SPECTRAL WEIGHT IN DOPED STRONGLY CORRELATED SYSTEMS [J].

ESKES, H ;

MEINDERS, MBJ ;

SAWATZKY, GA .

PHYSICAL REVIEW LETTERS, 1991, 67 (08) :1035-1038

[10] ELECTRON-ENERGY-LOSS AND X-RAY-ABSORPTION SPECTROSCOPY OF CUPRATE SUPERCONDUCTORS AND RELATED-COMPOUNDS [J].

FINK, J ;

NUCKER, N ;

PELLEGRIN, E ;

ROMBERG, H ;

ALEXANDER, M ;

KNUPFER, M .

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1994, 66 (3-4) :395-452

← 1 2 3 4 →