Ferromagnetic signal and unconventional Kondo-like effect in the superconducting Y1-xPrxBa2Cu3O7-δ systems

被引：3

作者：

Cao, Guixin ^{[1
,2
]}

Li, Yuanyuan ^{[1
]}

Zhang, Jincang ^{[1
]}

Cao, Shixun ^{[1
]}

Cai, Chuanbing ^{[1
]}

Shen, Xuechu ^{[1
]}

机构：

[1] Shanghai Univ, Dept Phys, Shanghai 200444, Peoples R China

[2] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

来源：

JOURNAL OF APPLIED PHYSICS | 2010年 / 107卷 / 08期

基金：

中国国家自然科学基金;

关键词：

TEMPERATURE; STATE;

D O I：

10.1063/1.3393941

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Electrical and magnetic properties were studied for the Y1-xPrxBa2Cu3O7-delta superconductors with x=0.44-0.48, which was located near the antiferromagnetic (AFM) and superconducting (SC) phase boundaries. An unconventional Kondo-like effect is observed below T-c for x=0.48, where the value of the resistivity minimum rho(min) increases with increasing magnetic field H. The transition temperature T-min first increases and then decreases with increasing field strength. Magnetic measurements show that a small fraction of FM phase appears and coexists with the SC and AFM phases. We discuss these findings from the viewpoints of Kondo scattering and electron-electron interaction, and found that the resistivity minimum below T-c is mainly due to the Kondo scattering. The Kondo scattering is identified as SC phase coexisting with AFM and FM clusters, which is as the Kondo singlets resulting from Pr substitution. This phase-separated state is unstable against the magnetic field which suppresses the SC phase and restores the single Kondo peak at low temperatures. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3393941]

引用

页数：5

共 28 条

[1] Enhancement of magnetic fluctuations on passing below Tc in the heavy fermion superconductor UPd2Al3 [J].

Bernhoeft, N ;

Sato, N ;

Roessli, B ;

Aso, N ;

Hiess, A ;

Lander, GH ;

Endoh, Y ;

Komatsubara, T .

PHYSICAL REVIEW LETTERS, 1998, 81 (19) :4244-4247

[2] Incommensurate magnetic ordering in Sr2Ru1-xTixO4 -: art. no. 197002 [J].

Braden, M ;

Friedt, O ;

Sidis, Y ;

Bourges, P ;

Minakata, M ;

Maeno, Y .

PHYSICAL REVIEW LETTERS, 2002, 88 (19) :4

[3] Hole distribution in YxPr1-xBa2Cu4O8 and YxPr1-xBa2Cu3O7 probed by X-ray absorption spectroscopy [J].

Chen, JM ;

Liu, SJ ;

Lee, JM ;

Lin, JY ;

Gou, YS ;

Yang, HD .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2004, 408 :818-819

[4] Evidence for a quantum phase transition in Pr2-xCexCuO4-δ from transport measurements -: art. no. 167001 [J].

Dagan, Y ;

Qazilbash, MM ;

Hill, CP ;

Kulkarni, VN ;

Greene, RL .

PHYSICAL REVIEW LETTERS, 2004, 92 (16) :167001-1

[5] UNUSUAL ELECTRONIC-STRUCTURE OF PRBA2CU3O7 [J].

FEHRENBACHER, R ;

RICE, TM .

PHYSICAL REVIEW LETTERS, 1993, 70 (22) :3471-3474

[6] Different self-consistent electronic structures of PrBa2Cu3O7 from LSDA+U calculations [J].

Ghanbarian, V. ;

Mohammadizadeh, M. R. .

PHYSICAL REVIEW B, 2008, 78 (14)

[7] The superconducting phases of UPt3 [J].

Joynt, R ;

Taillefer, L .

REVIEWS OF MODERN PHYSICS, 2002, 74 (01) :235-294

[8] Anomalous superconductivity and its competition with antiferromagnetism in doped Mott insulators [J].

Kancharla, S. S. ;

Kyung, B. ;

Senechal, D. ;

Civelli, M. ;

Capone, M. ;

Kotliar, G. ;

Tremblay, A. -M. S. .

PHYSICAL REVIEW B, 2008, 77 (18)

[9] Antiferromagnetic order as the competing ground state in electron-doped Nd1.85Ce0.15CuO4 [J].

Kang, HJ ;

Dai, PC ;

Lynn, JW ;

Matsuura, M ;

Thompson, JR ;

Zhang, SC ;

Argyriou, DN ;

Onose, Y ;

Tokura, Y .

NATURE, 2003, 423 (6939) :522-525

[10] Vortex dissipation in Y1-xPrxBa2Cu3O7-δ superconductors above and below the zero-field critical temperature -: art. no. 174501 [J].

Katuwal, T ;

Sandu, V ;

Almasan, CC ;

Taylor, BJ ;

Maple, MB .

PHYSICAL REVIEW B, 2005, 72 (17)

← 1 2 3 →