Electron-boson coupling and two superconducting gaps in optimally electron-doped BaFe1.9Ni0.1As2 single crystals

被引：10

作者：

Wang, Zhao-Sheng ^{[1
]}

Wang, Zhen-Yu ^{[1
]}

Luo, Hui-Qian ^{[1
]}

Lu, Xing-Ye ^{[1
]}

Zhu, Jun ^{[1
]}

Li, Chun-Hong ^{[1
]}

Shan, Lei ^{[1
]}

Yang, Huan ^{[1
,2
,3
]}

Wen, Hai-Hu ^{[1
,2
,3
]}

Ren, Cong ^{[1
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China

[2] Nanjing Univ, Ctr Superconducting Phys & Mat, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[3] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 06期

基金：

美国国家科学基金会;

关键词：

TUNNELING SPECTROSCOPY; IRON PNICTIDES; NEUTRON; FAMILY;

D O I：

10.1103/PhysRevB.86.060508

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report an investigation on c-axis point-contact Andreev reflection (PCAR) spectroscopy of optimally doped BaFe1.9Ni0.1As2 single crystals. The PCAR spectrum features the structures of a conductance peak with the energy scale of an electron-boson coupling mode. Quantitative analysis using a generalized Blonder-Tinkham-Klapwijk formalism with two gaps-one isotropic and another angle dependent-resolves a nodeless state in the strong-coupling limit with gap minima on the Fermi surfaces. Using the extracted superconducting energy gap value, a characteristic boson energy Omega(b) is obtained. Our results are consistent with the pairing interaction mediated by the antiferromagnetic spin fluctuations.

引用

页数：4

共 44 条

[21] Energy dependence of the electron-boson coupling strength in the electron-doped cuprate superconductor Pr1.85Ce0.15CuO4-δ
Beck, M.
Klammer, M.
Rousseau, I.
Obergfell, M.
Leiderer, P.
Helm, M.
Kabanov, V. V.
Diamant, I.
Rabinowicz, A.
Dagan, Y.
Demsar, J.
PHYSICAL REVIEW B, 2017, 95 (08)
[22] Simulation of Light C4+ Ion Irradiation and Its Enhancement to the Critical Current Density in BaFe1.9Ni0.1As2 Single Crystals
Shahbazi, M.
Wang, X. L.
Ionescu, M.
Ghorbani, S. R.
Dou, S. X.
Choi, K. Y.
SCIENCE OF ADVANCED MATERIALS, 2014, 6 (07) : 1650 - 1654
[23] Nonequilibrium quasiparticle relaxation dynamics in single crystals of hole- and electron-doped BaFe2As2
Torchinsky, Darius H.
McIver, James W.
Hsieh, David
Chen, G. F.
Luo, J. L.
Wang, N. L.
Gedik, Nuh
PHYSICAL REVIEW B, 2011, 84 (10):
[24] Decoupling of the superconducting and magnetic/structural phase transitions in electron-doped BaFe2As2
Canfield, P. C.
Bud'ko, S. L.
Ni, Ni
Yan, J. Q.
Kracher, A.
PHYSICAL REVIEW B, 2009, 80 (06):
[25] Upper Critical Fields and Anisotropy of BaFe1.9 Ni0.1As2 Single Crystals
Tao Qian
Shen Jing-Qin
Li Lin-Jun
Lin Xiao
Luo Yong-Kang
Cao Guang-Han
Xu Zhu-An
CHINESE PHYSICS LETTERS, 2009, 26 (09)
[26] Visualization of vortex motion in FeAs-based BaFe1.9Ni0.1As2 single crystal by means of magneto-optical imaging
Lin, Zhi Wei
Li, Yong Jian
Zhu, Jian Guo
Wang, Xiao Lin
Dou, Shi Xue
Guo, You Guang
Lei, Gang
Wang, Yi
Philips, Matthew
Cortie, Michael
Li, Yan Cheng
Choi, Ki-Young
Shi, Xun
JOURNAL OF APPLIED PHYSICS, 2011, 109 (07)
[27] Flux-creep activation energy for a BaFe1.9Ni0.1As2 single crystal derived from alternating current susceptibility measurements
Ge, Jun-Yi
Li, Lin-Jun
Xu, Zhu-An
Moshchalkov, Victor V.
JOURNAL OF APPLIED PHYSICS, 2016, 119 (16)
[28] MAGNETORESISTANCE OF SUPERCONDUCTING SINGLE-CRYSTALS OF THE ELECTRON-DOPED COMPOUND ND2-XCEXCUO4-Y
DEANDRADE, MC
DALICHAOUCH, Y
MAPLE, MB
PHYSICAL REVIEW B, 1993, 48 (22): : 16737 - 16743
[29] Peculiarities of the superconducting gaps and the electron-boson interaction in TmNi2B2C as seen by point-contact spectroscopy
Naidyuk, Yu. G.
Kvitnitskaya, O. E.
Tiutrina, L. V.
Yanson, I. K.
Behr, G.
Fuchs, G.
Drechsler, S. -L.
Nenkov, K.
Schultz, L.
PHYSICAL REVIEW B, 2011, 84 (09)
[30] Single superconducting energy scale in the electron-doped cuprate superconductor Pr2-xCexCuO4-δ
Diamant, I.
Greene, R. L.
Dagan, Y.
PHYSICAL REVIEW B, 2009, 80 (01):

← 1 2 3 4 5 →