Electronic Phase Separation in the Slightly Underdoped Iron Pnictide Superconductor Ba1-xKxFe2As2

被引：188

作者：

Park, J. T. ^{[1
]}

Inosov, D. S. ^{[1
]}

Niedermayer, Ch. ^{[2
,9
]}

Sun, G. L. ^{[1
]}

Haug, D. ^{[1
]}

Christensen, N. B. ^{[2
,3
,4
,9
]}

Dinnebier, R. ^{[1
]}

Boris, A. V. ^{[1
]}

Drew, A. J. ^{[5
,7
,8
]}

Schulz, L. ^{[5
,8
]}

Shapoval, T. ^{[6
]}

Wolff, U. ^{[6
]}

Neu, V. ^{[6
]}

Yang, Xiaoping ^{[1
]}

Lin, C. T. ^{[1
]}

Keimer, B. ^{[1
]}

Hinkov, V. ^{[1
]}

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[2] ETHZ, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

[3] Tech Univ Denmark, Mat Res Dept, Riso Natl Lab Sustainable Energy, DK-4000 Roskilde, Denmark

[4] Univ Copenhagen, Niels Bohr Inst, Nanosci Ctr, DK-2100 Copenhagen, Denmark

[5] Univ Fribourg, Dept Phys, CH-1700 Fribourg, Switzerland

[6] Inst Metall Mat, IFW Dresden, D-01171 Dresden, Germany

[7] Univ London, Dept Phys, London E1 4NS, England

[8] Univ Fribourg, Fribourg Ctr Nanomat, CH-1700 Fribourg, Switzerland

[9] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 11期

关键词：

HIGH-TEMPERATURE SUPERCONDUCTOR; BI2SR2CACU2O8+DELTA; LA2CUO4+DELTA; DENSITY; DIAGRAM; OXIDES; STATE; ORDER;

D O I：

10.1103/PhysRevLett.102.117006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Here we present a combined study of the slightly underdoped novel pnictide superconductor Ba1-xKxFe2As2 by means of x-ray powder diffraction, neutron scattering, muon-spin rotation (mu SR), and magnetic force microscopy (MFM). Static antiferromagnetic order sets in below T-m approximate to 70 K as inferred from the neutron scattering and zero-field-mu SR data. Transverse-field mu SR below T-c shows a coexistence of magnetically ordered and nonmagnetic states, which is also confirmed by MFM imaging. We explain such coexistence by electronic phase separation into antiferromagnetic and superconducting- or normal-state regions on a lateral scale of several tens of nanometers. Our findings indicate that such mesoscopic phase separation can be considered an intrinsic property of some iron pnictide superconductors.

引用

页数：4

共 44 条

[1] Muon-spin-relaxation studies of magnetic order and superfluid density in antiferromagnetic NdFeAsO, BaFe2As2, and superconducting Ba1-xKxFe2As2 [J].

Aczel, A. A. ;

Baggio-Saitovitch, E. ;

Budko, S. L. ;

Canfield, P. C. ;

Carlo, J. P. ;

Chen, G. F. ;

Dai, Pengcheng ;

Goko, T. ;

Hu, W. Z. ;

Luke, G. M. ;

Luo, J. L. ;

Ni, N. ;

Sanchez-Candela, D. R. ;

Tafti, F. F. ;

Wang, N. L. ;

Williams, T. J. ;

Yu, W. ;

Uemura, Y. J. .

PHYSICAL REVIEW B, 2008, 78 (21)

[2] Imaging the two gaps of the high-temperature superconductor Bi2Sr2CuO6+x [J].

Boyer, M. C. ;

Wise, W. D. ;

Chatterjee, Kamalesh ;

Yi, Ming ;

Kondo, Takeshi ;

Takeuchi, T. ;

Ikuta, H. ;

Hudson, E. W. .

NATURE PHYSICS, 2007, 3 (11) :802-806

[3]

Brewer J.H., 1994, ENCY APPL PHYS, V11, P23, DOI [10.1002/3527600434.eap258, DOI 10.1002/3527600434.EAP258]

[4] Colossal effects in transition metal oxides caused by intrinsic inhomogeneities [J].

Burgy, J ;

Mayr, M ;

Martin-Mayor, V ;

Moreo, A ;

Dagotto, E .

PHYSICAL REVIEW LETTERS, 2001, 87 (27) :277202-277202

[5] Tuning competing orders in La2-xSrxCuO4 cuprate superconductors by the application of an external magnetic field [J].

Chang, J. ;

Niedermayer, Ch. ;

Gilardi, R. ;

Christensen, N. B. ;

Ronnow, H. M. ;

McMorrow, D. F. ;

Ay, M. ;

Stahn, J. ;

Sobolev, O. ;

Hiess, A. ;

Pailhes, S. ;

Baines, C. ;

Momono, N. ;

Oda, M. ;

Ido, M. ;

Mesot, J. .

PHYSICAL REVIEW B, 2008, 78 (10)

[6] Fundamental parameters line profile fitting in laboratory diffractometers [J].

Cheary, RW ;

Coelho, AA ;

Cline, JP .

JOURNAL OF RESEARCH OF THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, 2004, 109 (01) :1-25

[7] Coexistence of the spin-density wave and superconductivity in Ba1-xKxFe2As2 [J].

Chen, H. ;

Ren, Y. ;

Qiu, Y. ;

Bao, Wei ;

Liu, R. H. ;

Wu, G. ;

Wu, T. ;

Xie, Y. L. ;

Wang, X. F. ;

Huang, Q. ;

Chen, X. H. .

EPL, 2009, 85 (01)

[8] Complexity in strongly correlated electronic systems [J].

Dagotto, E .

SCIENCE, 2005, 309 (5732) :257-262

[9]

Drew AJ, 2009, NAT MATER, V8, P310, DOI [10.1038/nmat2396, 10.1038/NMAT2396]

[10] Coexistence of magnetic fluctuations and superconductivity in the pnictide high temperature superconductor SmFeAsO1-xFx measured by muon spin rotation [J].

Drew, A. J. ;

Pratt, F. L. ;

Lancaster, T. ;

Blundell, S. J. ;

Baker, P. J. ;

Liu, R. H. ;

Wu, G. ;

Chen, X. H. ;

Watanabe, I. ;

Malik, V. K. ;

Dubroka, A. ;

Kim, K. W. ;

Roessle, M. ;

Bernhard, C. .

PHYSICAL REVIEW LETTERS, 2008, 101 (09)

← 1 2 3 4 5 →