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 50 条

[41] A systematic study of femtosecond quasiparticle relaxation processes in La2-xSrxCuO4 -: art. no. 014544
Kusar, P
Demsar, J
Mihailovic, D
Sugai, S
PHYSICAL REVIEW B, 2005, 72 (01)
[42] Doping dependence of charge-transfer excitations in La2-xSrxCuO4 -: art. no. 094524
Kim, YJ
Hill, JP
Komiya, S
Ando, Y
Casa, D
Gog, T
Venkataraman, CT
PHYSICAL REVIEW B, 2004, 70 (09) : 094524 - 1
[43] Anisotropic order-disorder vortex transition in La2-xSrxCuO4 -: art. no. 214525
Radzyner, Y
Shaulov, A
Yeshurun, Y
Felner, I
Kishio, K
Shimoyama, J
PHYSICAL REVIEW B, 2002, 65 (21)
[44] Effects of electron-phonon coupling on the metal-insulator transition in La2-xSrxCuO4 superconductors -: art. no. 153107
Zhang, CJ
Zhang, YH
PHYSICAL REVIEW B, 2003, 67 (15)
[45] Electronic ground state of heavily overdoped nonsuperconducting La2-xSrxCuO4 -: art. no. 100502
Nakamae, S
Behnia, K
Mangkorntong, N
Nohara, M
Takagi, H
Yates, SJC
Hussey, NE
PHYSICAL REVIEW B, 2003, 68 (10)
[46] Evolution of midgap states and residual three dimensionality in La2-xSrxCuO4 -: art. no. 157601
Sahrakorpi, S
Lindroos, M
Markiewicz, RS
Bansil, A
PHYSICAL REVIEW LETTERS, 2005, 95 (15)
[47] Thermal hysteresis in the normal-state magnetization of La2-xSrxCuO4 -: art. no. 144508
Panagopoulos, C
Majoros, M
Petrovic, AP
PHYSICAL REVIEW B, 2004, 69 (14): : 144508 - 1
[48] ORIGINS OF THE ANOMALOUS DOPING EFFECTS OF THE HALL CONSTANTS OF LA2-XSRXCUO4 AND ND2-XCEXCUO4-Y
KAGA, H
SAIKAWA, T
SOLID STATE COMMUNICATIONS, 1992, 82 (03) : 189 - 193
[49] Crossing the gap from p- to n-type doping:: Nature of the states near the chemical potential in La2-xSrxCuO4 and Nd2-xCexCuO4-δ -: art. no. 247005
Steeneken, PG
Tjeng, LH
Sawatzky, GA
Tanaka, A
Tjernberg, O
Ghiringhelli, G
Brookes, NB
Nugroho, AA
Menovsky, AA
PHYSICAL REVIEW LETTERS, 2003, 90 (24)
[50] Comment on "Nonmonotonic dx2-y2 superconducting order parameter in Nd2-xCexCuO4" -: art. no. 149701
Venturini, F
Hackl, R
Michelucci, U
PHYSICAL REVIEW LETTERS, 2003, 90 (14)

← 1 2 3 4 5 →