Absence of Andreev bound states in β-PdBi2 probed by point-contact Andreev reflection spectroscopy

被引：20

作者：

Che, Liqiang ^{[1
,2
]}

Le, Tian ^{[1
,2
]}

Xu, C. Q. ^{[3
,4
]}

Xing, X. Z. ^{[5
]}

Shi, Zhixiang ^{[5
]}

Xu, Xiaofeng ^{[3
,4
]}

Lu, Xin ^{[1
,2
,6
]}

机构：

[1] Zhejiang Univ, Ctr Correlated Matter, Hangzhou 310058, Zhejiang, Peoples R China

[2] Zhejiang Univ, Dept Phys, Hangzhou 310058, Zhejiang, Peoples R China

[3] Hangzhou Normal Univ, Dept Phys, Hangzhou 310036, Zhejiang, Peoples R China

[4] Hangzhou Normal Univ, Hangzhou Key Lab Quantum Mattters, Hangzhou 310036, Zhejiang, Peoples R China

[5] Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China

[6] Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 02期

基金：

中国国家自然科学基金;

关键词：

MAJORANA FERMIONS; SUPERCONDUCTOR; FILM; GAP;

D O I：

10.1103/PhysRevB.94.024519

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report point-contact spectroscopic studies on high quality single crystalline beta-PdBi2 with a superconducting T-c = 5.2 K. Our measurements showa typical double-peak structure in the voltage-biased junction conductance at low temperatures, probably excluding the existence of topological Andreev bound states. The conductance curves can be well fitted with the standard Blonder-Tinkham-Klapwijk model for s-wave superconductors, yielding a superconducting gap Delta(0) similar or equal to 0.92 meV with 2 Delta(0)/k(B)T(c) similar to 4.1. Our results strongly suggest that beta-PdBi2 is a conventional intermediate-coupling s-wave superconductor.

引用

页数：5

共 50 条

[31] Point-Contact Andreev-Reflection Spectroscopy in the Fe-based Superconductor LaFeAsO1−xFx
M. Tortello
D. Daghero
G. A. Ummarino
R. S. Gonnelli
V. A. Stepanov
J. S. Kim
Journal of Superconductivity and Novel Magnetism, 2009, 22 : 553 - 557
[32] Direct determination of the Andreev reflection probability by means of point contact spectroscopy
Jakob, M
Stahl, H
Knoch, J
Appenzeller, J
Lengeler, B
Hardtdegen, H
Lüth, H
APPLIED PHYSICS LETTERS, 2000, 76 (09) : 1152 - 1154
[33] Kondo breakdown in the topological Kondo insulator SmB6 studied by point-contact Andreev reflection spectroscopy
Shiga, Masanobu
Teramoto, Tsubasa
Harada, Takurou
Takahashi, Takuya
Iga, Fumitoshi
Kawae, Tatsuya
PHYSICAL REVIEW B, 2023, 108 (19)
[34] Measuring surface spin-polarization of ferromagnetic thin films using point-contact Andreev reflection spectroscopy
Grimley, Everett D.
Biswas, Amlan
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2013, 245
[35] Minimal model of point contact Andreev reflection spectroscopy of multiband superconductors
Romeo, F.
Citro, R.
PHYSICAL REVIEW B, 2015, 91 (03):
[36] Spin polarization measurements on polycrystalline strontium ruthenates using point-contact Andreev reflection
Sanders, J.
Woods, G.T.
Poddar, P.
Srikanth, H.
Dabrowski, B.
Kolesnik, S.
Journal of Applied Physics, 2005, 97 (10):
[37] Andreev reflection of quantum Hall states through a quantum point contact
Hatefipour, Mehdi
Cuozzo, Joseph J.
Levy, Ido
Strickland, William M.
Langone, Dylan
Rossi, Enrico
Shabani, Javad
PHYSICAL REVIEW B, 2024, 109 (03)
[38] Point-contact Andreev reflection spectroscopy on the misfit phase superconductors (PbSe)1.12(TaSe2) doped with Cl or Br
Che, Liqiang
Le, Tian
Huang, Qi
Yin, Lichang
Chen, Ye
Yang, Xiaohui
Xu, Zhu-An
Lu, Xin
PHYSICAL REVIEW B, 2019, 99 (02)
[39] Spin polarization measurements on polycrystalline strontium ruthenates using point-contact Andreev reflection
Sanders, J
Woods, GT
Poddar, P
Srikanth, H
Dabrowski, B
Kolesnik, S
JOURNAL OF APPLIED PHYSICS, 2005, 97 (10)
[40] Pairing state in the ruthenocuprate superconductor RuSr2GdCu2O8:: A point-contact Andreev reflection spectroscopy study
Piano, S
Bobba, F
Giubileo, F
Cucolo, AM
Gombos, M
Vecchione, A
PHYSICAL REVIEW B, 2006, 73 (06):

← 1 2 3 4 5 →