Anomalous pseudogap formation in a nonsuperconducting crystal of Nd1.85Ce0.15CuO4+γ:: Implication of charge ordering

被引：45

作者：

Onose, Y ^{[1
]}

Taguchi, Y ^{[1
]}

Ishikawa, T ^{[1
]}

Shinomori, S ^{[1
]}

Ishizaka, K ^{[1
]}

Tokura, Y ^{[1
]}

机构：

[1] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.82.5120

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Temperature variation of optical conductivity and Raman spectra has been investigated comparatively for oxygenated antiferromagnetic and reduced superconducting crystals of Nd1.85Ce0.15CuO4+y. While the spectra of the reduced crystal change little with temperature, in the spectra of oxygenated crystal a conspicuous pseudogap structure evolves around 0.3 eV and activated infrared and Raman Cu-O phonon modes grow in intensity, with decreasing temperature from 340 K. The origin is proposed to be charge ordering instability induced by a minute amount of interstitial apical oxygen, which seems to be also responsible for the absence of superconductivity in an oxygenated (or as-grown) crystal.

引用

页码：5120 / 5123

页数：4

共 25 条

[1] LUTTINGER FERMI-SURFACE OF METALLIC GAP SPECTRAL WEIGHT IN ND1.85CE0.15CUO4-Y [J].

ANDERSON, RO ;

CLAESSEN, R ;

ALLEN, JW ;

OLSON, CG ;

JANOWITZ, C ;

LIU, LZ ;

PARK, JH ;

MAPLE, MB ;

DALICHAOUCH, Y ;

DEANDRADE, MC ;

JARDIM, RF ;

EARLY, EA ;

OH, SJ ;

ELLIS, WP .

PHYSICAL REVIEW LETTERS, 1993, 70 (20) :3163-3166

[2] OPTICAL-SPECTRA OF PR2-XCEXCUO4-DELTA CRYSTALS - EVOLUTION OF IN-GAP STATES WITH ELECTRON DOPING [J].

ARIMA, T ;

TOKURA, Y ;

UCHIDA, S .

PHYSICAL REVIEW B, 1993, 48 (09) :6597-6603

[3] ANTIFERROMAGNETIC ENERGY GAP IN CHROMIUM [J].

BARKER, AS ;

HALPERIN, BI ;

RICE, TM .

PHYSICAL REVIEW LETTERS, 1968, 20 (08) :384-&

[4] SHORT-RANGE ATOMIC-STRUCTURE OF ND2-XCEXCUO4-Y DETERMINED BY REAL-SPACE REFINEMENT OF NEUTRON-POWDER-DIFFRACTION DATA [J].

BILLINGE, SJL ;

EGAMI, T .

PHYSICAL REVIEW B, 1993, 47 (21) :14386-14406

[5] GROWTH OF THE OPTICAL CONDUCTIVITY IN THE CU-O PLANES [J].

COOPER, SL ;

THOMAS, GA ;

ORENSTEIN, J ;

RAPKINE, DH ;

MILLIS, AJ ;

CHEONG, SW ;

COOPER, AS ;

FISK, Z .

PHYSICAL REVIEW B, 1990, 41 (16) :11605-11608

[6] Direct observation of the spin-density-wave gap in (TMTSF)(2)PF6 [J].

Degiorgi, L ;

Dressel, M ;

Schwartz, A ;

Alavi, B ;

Gruner, G .

PHYSICAL REVIEW LETTERS, 1996, 76 (20) :3838-3841

[7]

Gr?ner G., 1994, DENSITY WAVE SOLIDS

[8] RAMAN-STUDY OF PURE AND CE DOPED SINGLE-CRYSTALS OF ND2CUO4-Y [J].

HADJIEV, VG ;

KOSTADINOV, IZ ;

BOZUKOV, L ;

DINOLOVA, E ;

MATEEV, DM .

SOLID STATE COMMUNICATIONS, 1989, 71 (12) :1093-1097

[9] PHONON ANOMALIES AND STRUCTURAL STABILITY IN THE R2-XCEXCUO4 SYSTEM (R=GD,SM,ND,PR) [J].

HEYEN, ET ;

LIU, R ;

CARDONA, M ;

PINOL, S ;

MELVILLE, RJ ;

PAUL, DM ;

MORAN, E ;

ALARIOFRANCO, MA .

PHYSICAL REVIEW B, 1991, 43 (04) :2857-2865

[10] Optical spectroscopy of charge-ordering transition in La1/3Sr2/3FeO3 [J].

Ishikawa, T ;

Park, SK ;

Katsufuji, T ;

Arima, T ;

Tokura, Y .

PHYSICAL REVIEW B, 1998, 58 (20) :13326-13329

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