Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by protect annealing

被引：75

作者：

Horio, M. ^{[1
]}

Adachi, T. ^{[2
]}

Mori, Y. ^{[3
]}

Takahashi, A. ^{[3
]}

Yoshida, T. ^{[1
]}

Suzuki, H. ^{[1
]}

Ambolode, L. C. C., II ^{[1
]}

Okazaki, K. ^{[1
]}

Ono, K. ^{[4
]}

Kumigashira, H.

Anzai, H. ^{[5
,8
]}

Arita, M. ^{[5
]}

Namatame, H. ^{[5
]}

Taniguchi, M. ^{[5
,6
]}

Ootsuki, D. ^{[1
]}

Sawada, K. ^{[7
]}

Takahashi, M. ^{[1
]}

Mizokawa, T. ^{[7
]}

Koike, Y. ^{[3
]}

Fujimori, A. ^{[1
]}

机构：

[1] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[2] Sophia Univ, Dept Engn & Appl Sci, Tokyo 1028554, Japan

[3] Tohoku Univ, Dept Appl Phys, Sendai, Miyagi 9808579, Japan

[4] KEK, Photon Factory, Tsukuba, Ibaraki 3050801, Japan

[5] Hiroshima Univ, Hiroshima Synchrotron Radiat Ctr, Higashihiroshima 7390046, Japan

[6] Hiroshima Univ, Grad Sch Sci, Higashihiroshima 7398526, Japan

[7] Univ Tokyo, Grad Sch Frontier Sci, Kashiwa, Chiba 2770882, Japan

[8] Osaka Prefecture Univ, Grad Sch Engn, Sakai, Osaka 5998531, Japan

来源：

NATURE COMMUNICATIONS | 2016年 / 7卷

关键词：

SPIN CORRELATIONS; MAGNETIC ORDER; CUPRATE; ND2-XCEXCUO4+/-DELTA;

D O I：

10.1038/ncomms10567

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

In the hole-doped cuprates, a small number of carriers suppresses antiferromagnetism and induces superconductivity. In the electron-doped cuprates, on the other hand, superconductivity appears only in a narrow window of high-doped Ce concentration after reduction annealing, and strong antiferromagnetic correlation persists in the superconducting phase. Recently, Pr1.3-xLa0.7CexCuO4 (PLCCO) bulk single crystals annealed by a protect annealing method showed a high critical temperature of around 27 K for small Ce content down to 0.05. Here, by angle-resolved photoemission spectroscopy measurements of PLCCO crystals, we observed a sharp quasi-particle peak on the entire Fermi surface without signature of an antiferromagnetic pseudogap unlike all the previous work, indicating a dramatic reduction of antiferromagnetic correlation length and/or of magnetic moments. The superconducting state was found to extend over a wide electron concentration range. The present results fundamentally challenge the long-standing picture on the electronic structure in the electron-doped regime.

引用

页数：8

共 46 条

[1]

Adachi T, 2015, PREPRINT

[2] Evolution of the Electronic State through the Reduction Annealing in Electron-Doped Pr1.3-xLa0.7CexCuO4+δ (x=0.10) Single Crystals: Antiferromagnetism, Kondo Effect, and Superconductivity [J].

Adachi, Tadashi ;

Mori, Yosuke ;

Takahashi, Akira ;

Kato, Masatsune ;

Nishizaki, Terukazu ;

Sasaki, Takahiko ;

Kobayashi, Norio ;

Koike, Yoji .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2013, 82 (06)

[3] 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

[4] Superconductivity in bulk T′-(La,Sm)2CuO4 prepared via a molten alkaline hydroxide route [J].

Asai, S. ;

Ueda, S. ;

Naito, M. .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2011, 471 (21-22) :682-685

[5] SPIN-FLUCTUATION CONTRIBUTIONS TO SPECIFIC HEAT [J].

BRINKMAN, WF ;

ENGELSBERG, S .

PHYSICAL REVIEW, 1968, 169 (02) :417-+

[6] EXTENDED SUPERCONDUCTING CONCENTRATION RANGE OBSERVED IN PR2-XCEXCUO4-DELTA [J].

BRINKMANN, M ;

REX, T ;

BACH, H ;

WESTERHOLT, K .

PHYSICAL REVIEW LETTERS, 1995, 74 (24) :4927-4930

[7] Charge Order Driven by Fermi-Arc Instability in Bi2Sr2-xLaxCuO6+δ [J].

Comin, R. ;

Frano, A. ;

Yee, M. M. ;

Yoshida, Y. ;

Eisaki, H. ;

Schierle, E. ;

Weschke, E. ;

Sutarto, R. ;

He, F. ;

Soumyanarayanan, A. ;

He, Yang ;

Le Tacon, M. ;

Elfimov, I. S. ;

Hoffman, Jennifer E. ;

Sawatzky, G. A. ;

Keimer, B. ;

Damascelli, A. .

SCIENCE, 2014, 343 (6169) :390-392

[8]

da Silva Neto EH, 2015, SCIENCE, V347, P282, DOI [10.1126/science.1256441, 10.1126/science.aaa2148]

[9] Low-energy spin fluctuations in the ground states of electron-doped Pr1-xLaCexCuO4+δ cuprate superconductors [J].

Fujita, M. ;

Matsuda, M. ;

Lee, S. -H. ;

Nakagawa, M. ;

Yamada, K. .

PHYSICAL REVIEW LETTERS, 2008, 101 (10)

[10] Truncation of a two-dimensional Fermi surface due to quasiparticle gap formation at the saddle points [J].

Furukawa, N ;

Rice, TM ;

Salmhofer, M .

PHYSICAL REVIEW LETTERS, 1998, 81 (15) :3195-3198

← 1 2 3 4 5 →