Momentum dependence of charge excitations in the electron-doped superconductor Nd1.85Ce0.15CuO4:: A resonant inelastic x-ray scattering study -: art. no. 207003

被引：72

作者：

Ishii, K

Tsutsui, K

Endoh, Y

Tohyama, T

Maekawa, S

Hoesch, M

Kuzushita, K

Tsubota, M

Inami, T

Mizuki, J

Murakami, Y

Yamada, K

机构：

[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[2] Int Inst Adv Studies, Kyoto 6190025, Japan

[3] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.94.207003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a resonant inelastic x-ray scattering (RIXS) study of charge excitations in the electron-doped high-T-c superconductor Nd1.85Ce0.15CuO4. The intraband and interband excitations across the Fermi energy are separated for the first time by tuning the experimental conditions properly to measure charge excitations at low energy. A dispersion relation with q-dependent width emerges clearly in the intraband excitation, while the intensity of the interband excitation is concentrated around 2 eV near the zone center. The experimental results are consistent with theoretical calculation of the RIXS spectra based on the Hubbard model.

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页数：4

相关论文

共 19 条

[1] Anomalous electronic structure and pseudogap effects in Nd1.85Ce0.15CuO4 -: art. no. 147003 [J].

Armitage, NP ;

Lu, DH ;

Kim, C ;

Damascelli, A ;

Shen, KM ;

Ronning, F ;

Feng, DL ;

Bogdanov, P ;

Shen, ZX ;

Onose, Y ;

Taguchi, Y ;

Tokura, Y ;

Mang, PK ;

Kaneko, N ;

Greven, M .

PHYSICAL REVIEW LETTERS, 2001, 87 (14) :147003/1-147003/4

[2] Angle resolved photoemission from Nd1.85Ce0.15CuO4 using high energy photons:: A Fermi surface investigation -: art. no. 136402 [J].

Claesson, T ;

Månsson, M ;

Dallera, C ;

Venturini, F ;

Nadaï, CD ;

Brookes, NB ;

Tjernberg, O .

PHYSICAL REVIEW LETTERS, 2004, 93 (13) :136402-1

[3] Angle-resolved photoemission studies of the cuprate superconductors [J].

Damascelli, A ;

Hussain, Z ;

Shen, ZX .

REVIEWS OF MODERN PHYSICS, 2003, 75 (02) :473-541

[4] ANOMALOUS SPIN AND CHARGE DYNAMICS OF THE T-J MODEL AT LOW DOPING [J].

EDER, R ;

OHTA, Y ;

MAEKAWA, S .

PHYSICAL REVIEW LETTERS, 1995, 74 (25) :5124-5127

[5] Anomalous low-doping phase of the Hubbard model [J].

Gröber, C ;

Eder, R ;

Hanke, W .

PHYSICAL REVIEW B, 2000, 62 (07) :4336-4352

[6] Polarization and momentum dependence of a charge-transfer excitation in Nd2CuO4 [J].

Hämäläinen, K ;

Hill, JP ;

Huotari, S ;

Kao, CC ;

Berman, LE ;

Kotani, A ;

Idé, T ;

Peng, JL ;

Greene, RL .

PHYSICAL REVIEW B, 2000, 61 (03) :1836-1840

[7] Electronic structure of Mott insulators studied by inelastic X-ray scattering [J].

Hasan, MZ ;

Isaacs, ED ;

Shen, ZX ;

Miller, LL ;

Tsutsui, K ;

Tohyama, T ;

Maekawa, S .

SCIENCE, 2000, 288 (5472) :1811-1814

[8]

HASAN MZ, CONDMAT0406654, P22710

[9] Resonant inelastic x-ray scattering in Nd2CuO4 [J].

Hill, JP ;

Kao, CC ;

Caliebe, WAL ;

Matsubara, M ;

Kotani, A ;

Peng, JL ;

Greene, RL .

PHYSICAL REVIEW LETTERS, 1998, 80 (22) :4967-4970

[10] An inelastic X-ray scattering spectrometer for materials science on BL11XU at SPring-8 [J].

Inami, T ;

Fukuda, T ;

Mizuki, J ;

Nakao, H ;

Matsumura, T ;

Murakami, Y ;

Hirota, K ;

Endoh, Y .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2001, 467 :1081-1083