Mott gap excitations in twin-free YBa2Cu3O7-δ (Tc = 93 K) studied by resonant inelastic X-ray scattering -: art. no. 187002

被引：37

作者：

Ishii, K ^{[1
]}

Tsutsui, K

Endoh, Y

Tohyama, T

Kuzushita, K

Inami, T

Ohwada, K

Maekawa, S

Masui, T

Tajima, S

Murakami, Y

Mizuki, J

机构：

[1] Japan Atom Energy Res Inst, Synchrotron Radiat Res Ctr, Hyogo 6795148, Japan

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

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

[4] ISTEC, Superconducting Res Lab, Tokyo 1350062, Japan

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

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.94.187002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Mott gap excitations in the optimally doped high-T-c superconductor YBa2Cu3O7-delta (T-c=93 K) have been studied by the resonant inelastic x-ray scattering method. Anisotropic spectra in the ab plane are observed in a twin-free crystal. The excitation from the one-dimensional CuO chain is enhanced at 2 eV near the zone boundary of the b* direction, while the excitation from the CuO2 plane is broad at 1.5-4 eV and almost independent of the momentum transfer. Theoretical calculations based on the one-dimensional and two-dimensional Hubbard model reproduces the observed spectra when different values of the on-site Coulomb energy are assumed. The Mott gap of the CuO chain site is found to be much smaller than that of the CuO2 plane site.

引用

页数：4

共 28 条

[1] INPLANE ANISOTROPY OF THE PENETRATION DEPTH IN YBA2CU3O7-X AND YBA2CU4O8 SUPERCONDUCTORS [J].

BASOV, DN ;

LIANG, R ;

BONN, DA ;

HARDY, WN ;

DABROWSKI, B ;

QUIJADA, H ;

TANNER, DB ;

RICE, JP ;

GINSBERG, DM ;

TIMUSK, T .

PHYSICAL REVIEW LETTERS, 1995, 74 (04) :598-601

[2] Nanoscale one-dimensional scattering resonances in the CuO chains of YBa2Cu3O6+x -: art. no. 097002 [J].

Derro, DJ ;

Hudson, EW ;

Lang, KM ;

Pan, SH ;

Davis, JC ;

Markert, JT ;

de Lozanne, AL .

PHYSICAL REVIEW LETTERS, 2002, 88 (09) :4-970024

[3] MODULATIONS IN THE CUO CHAIN LAYER OF YBA2CU3O7-DELTA - CHARGE-DENSITY WAVES [J].

EDWARDS, HL ;

BARR, AL ;

MARKERT, JT ;

DELOZANNE, AL .

PHYSICAL REVIEW LETTERS, 1994, 73 (08) :1154-1157

[4]

*EPAPS, EPRLTAO94074521 EPAP, P20403

[5] Anisotropy of heat conduction in YBa2Cu3O6.9: A probe of chain superconductivity [J].

Gagnon, R ;

Pu, S ;

Ellman, B ;

Taillefer, L .

PHYSICAL REVIEW LETTERS, 1997, 78 (10) :1976-1979

[6] 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

[7] Momentum-resolved charge excitations in a prototype one-dimensional Mott insulator [J].

Hasan, MZ ;

Montano, PA ;

Isaacs, ED ;

Shen, ZX ;

Eisaki, H ;

Sinha, SK ;

Islam, Z ;

Motoyama, N ;

Uchida, S .

PHYSICAL REVIEW LETTERS, 2002, 88 (17) :1774031-1774034

[8] Two-dimensional geometry of spin excitations in the high-transition-temperature superconductor YBa2Cu3O6+x [J].

Hinkov, V ;

Pailhès, S ;

Bourges, P ;

Sidis, Y ;

Ivanov, A ;

Kulakov, A ;

Lin, CT ;

Chen, DP ;

Bernhard, C ;

Keimer, B .

NATURE, 2004, 430 (7000) :650-653

[9] Orbital excitations in LaMnO3 studied by resonant inelastic x-ray scattering -: art. no. 045108 [J].

Inami, T ;

Fukuda, T ;

Mizuki, J ;

Ishihara, S ;

Kondo, H ;

Nakao, H ;

Matsumura, T ;

Hirota, K ;

Murakami, Y ;

Maekawa, S ;

Endoh, Y .

PHYSICAL REVIEW B, 2003, 67 (04)

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