Lanthanide substitution effects in electron-doped High-Tc superconductors studied by angle-resolved photoemission spectroscopy

被引:6
作者
Ikeda, M.
Yoshida, T.
Fujimori, A.
Kubota, M.
Ono, K.
Unozawa, K.
Sasagawa, T.
Takagi, H.
机构
[1] Univ Tokyo, Dept Complex Sci & Engn, Chiba 2778561, Japan
[2] KEK, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan
[3] Univ Tokyo, Dept Adv Mat Sci, Chiba 2778561, Japan
关键词
electron-doped high-T-c superconductor; antiferromagnetism; photoemission;
D O I
10.1007/s10948-007-0268-x
中图分类号
O59 [应用物理学];
学科分类号
摘要
We have performed an angle-resolved photoemission study of the electron-doped high-T (c) superconductors (HTSCs) Sm1.85Ce0.15CuO4 (SCCO) and Eu1.85Ce0.15CuO4 (ECCO). Around the nodal point (k) over right arrow similar to(pi/2,pi/2), we observed an energy gap at the Fermi level (E-F) for both samples, resulting from the strong effects of antiferromagnetism. The magnitude of this gap in ECCO is larger than that in SCCO, implying that the effects of antiferromagnetism in ECCO are stronger than that in SCCO. Also, we quantitatively confirmed the effects of antiferromagnetism by the band dispersions to tight-binding calculation.
引用
收藏
页码:563 / 565
页数:3
相关论文
共 9 条
[1]   Ultrahigh vacuum three-axis cryogenic sample manipulator for angle-resolved photoelectron spectroscopy [J].
Aiura, Y ;
Bando, H ;
Miyamoto, T ;
Chiba, A ;
Kitagawa, R ;
Maruyama, S ;
Nishihara, Y .
REVIEW OF SCIENTIFIC INSTRUMENTS, 2003, 74 (06) :3177-3179
[2]   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
[3]   OPTICAL STUDIES OF GAP, EXCHANGE, AND HOPPING ENERGIES IN THE INSULATING CUPRATES [J].
COOPER, SL ;
THOMAS, GA ;
MILLIS, AJ ;
SULEWSKI, PE ;
ORENSTEIN, J ;
RAPKINE, DH ;
CHEONG, SW ;
TREVOR, PL .
PHYSICAL REVIEW B, 1990, 42 (16) :10785-10788
[4]   Magnetic phase diagrams of electron-doped high-Tc cuprates Pr1-xLaCexCuO4-δ and Nd2-xCexCuO4-δ studied by μSR measurements [J].
Kubo, T ;
Uefuji, T ;
Fujita, M ;
Yamada, K ;
Watanabe, I ;
Nagamine, K .
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2002, 378 :354-359
[5]   PRESSURE-DEPENDENCE OF TC IN L2-XMXCUO4-Y (L = PR,ND,SM,EU M = CE,TH) - ANTISYMMETRIC BEHAVIOR OF ELECTRON-DOPED VERSUS HOLE-DOPED COPPER-OXIDE SUPERCONDUCTORS [J].
MARKERT, JT ;
BEILLE, J ;
NEUMEIER, JJ ;
EARLY, EA ;
SEAMAN, CL ;
MORAN, T ;
MAPLE, MB .
PHYSICAL REVIEW LETTERS, 1990, 64 (01) :80-83
[6]   Angle-resolved photoemission spectroscopy of the antiferromagnetic superconductor Nd1.87Ce0.13CuO4:: Anisotropic spin-correlation gap, pseudogap, and the induced quasiparticle mass enhancement -: art. no. 047005 [J].
Matsui, H ;
Terashima, K ;
Sato, T ;
Takahashi, T ;
Wang, SC ;
Yang, HB ;
Ding, H ;
Uefuji, T ;
Yamada, K .
PHYSICAL REVIEW LETTERS, 2005, 94 (04)
[7]   Superconducting T′-La2-xCexCuO4 films grown by molecular beam epitaxy [J].
Naito, M ;
Hepp, M .
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 2000, 39 (6A) :L485-L487
[8]  
SASAGAWA T, 2005, KEK MSL PROGR, P13
[9]   A SUPERCONDUCTING COPPER-OXIDE COMPOUND WITH ELECTRONS AS THE CHARGE-CARRIERS [J].
TOKURA, Y ;
TAKAGI, H ;
UCHIDA, S .
NATURE, 1989, 337 (6205) :345-347