| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Resistance fluctuations in superconducting KxFe2-ySe2 single crystals studied by low-frequency noise spectroscopy |
| Hai Zi(子海)1, Yuan Yao(姚湲)2,†, Ming-Chong He(何明冲)1, Di Ke(可迪)1, Hong-Xing Zhan(詹红星)1, Yu-Qing Zhao(赵宇清)1, Hai-Hu Wen(闻海虎)3, and Cong Ren(任聪)1,‡ |
| 1 Physics Department, School of Physics and Astronomy, Yunnan University, Kunming 50500, China;
2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190, China; 3 Physics Department, Nanjing University, Nanjing 210093, China
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Abstract Low-frequency resistance noise spectroscopy is applied to investigate bulk single crystals of the intercalated iron-selenide KxFe2-ySe2 superconductors with different iron vacancy orders. Based on a generalized fluctuation model, the well-observed resistance hump above 100 K is interpreted as an insulator-metal phase transition with a characteristic transition energy of 0.1-0.6 eV, indicating a highly inhomogeneous energy distribution configuration. In the superconducting transition regime, we find that the normalized resistance noise scales with resistance R excellently as SR/R2 ∝ Rl rs with the noise exponent lrs≈ 1.4. With reduced iron vacancy disordering in enhanced superconductivity KxFe2-ySe2 crystals, the level of resistance fluctuations is greatly suppressed, suggesting a geometrical phase transition for conduction channel, which is directly related to the microstructure of the crystals.
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Received: 30 January 2021
Revised: 04 March 2021
Accepted manuscript online: 23 March 2021
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PACS:
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74.40.De
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(Noise and chaos)
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74.81.-g
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(Inhomogeneous superconductors and superconducting systems, including electronic inhomogeneities)
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64.60.ah
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(Percolation)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11774303 and 11574373) and Joint Fund of Yunnan Provincial Science and Technology Department, China (Grant No. 2019FY003008). |
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Corresponding Authors:
†Corresponding author. E-mail: yaoyuan@iphy.ac.cn ‡Corresponding author. E-mail: cren_ynu@163.com
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Cite this article:
Hai Zi(子海), Yuan Yao(姚湲), Ming-Chong He(何明冲), Di Ke(可迪), Hong-Xing Zhan(詹红星), Yu-Qing Zhao(赵宇清), Hai-Hu Wen(闻海虎), and Cong Ren(任聪) Resistance fluctuations in superconducting KxFe2-ySe2 single crystals studied by low-frequency noise spectroscopy 2021 Chin. Phys. B 30 047402
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1 Dagotto E 2005 Scienc 309 257
2 Dagotto E, Hotta T and Moreo A 2001 Phys. Rep. 344 1
3 Johannes M D and Mazin I I 2008 Phys. Rev. B 77 165135
4 Uemura Y 2009 Nat. Mater. 8 253
5 Lee P A, Nagaosa N and Wen X G 2006 Rev. Mod. Phys. 78 17
6 Tranquada J M, Sternlleb B J, Axe J D, Nakamura Y and Uchida S 1995 Nature 375 561
7 Kivelson S A, Bindloss I P, Fradkin E, Oganesyan V, Tranquada J M, Kapitulnik A and Howald C 2009 Rev. Mod. Phys. 75 1201
8 McElroy K, Lee J, Slezak J A, Lee D H, Eisaki H, Uchida S and Davis J C 2005 Science 309 1048
9 Uehara M, Mori S, Chen C H,Cheong S W 1999 Nature 399 560
10 Mori S, Chen C H and Cheng S W 1998 Nature 392 473
11 Phillips J C 2008 Pro. Natl. Acad. Sci. USA 105 9917
12 Gor'kov L and Kresin V 2000 J. Supercond: Incorp. Novel Magn. 13 239
13 Dagotto E2002 Nanoscale Phase Separation and Colossal Magnetoresistance(Springer-Verlag)
14 Park J T, Inosov D S, Niedermayer Ch, Sun G L, Haug D, Christensen N B, Dinnebier R, Boris A V, Drew A J, Schulz L, Shapoval T, Wolff U, Neu V, Yang X P, Lin C T, Keimer B and Hinkov V 2009 Phys. Rev. Lett. 102 117006
15 He X B, Li G R, Zhang J D, Karki A B, Jin R Y, Sales B C, Sefat A S, McGuire M A, Mandrus D and Plummer E W 2011 Phys. Rev. B 83 220502
16 Speller S C, Britton T B, Hughes G M, Krzton G and Maziopa A 2012 Supercond. Sci. Technol. 25 084023
17 Guo J G, Jin S F, Wang G, Wang S C, Zhu K X, Zhou T T, He M and Chen X L 2010 Phys. Rev. B 82 180520
18 Sun L L, Chen X J, Guo J, Gao P W, Huang Q Z, Wang H D, Fang M H, Chen X L, Chen G F, Wu Q, Zhang C, Gu D C, Dong X L, Wang L, Yang L, Li A G, Dai X, Mao H K and Zhao Z X 2012 Nature 483 67
19 Liu Y, Wang G, Ying T P, Lai X F, Jin S F, Liu N, Hu J P and Chen X L 2016 Adv. Sci. 3 1600098
20 Li W, Ding H, Deng P, Chang K, Song C L, He K, Wang L L, Ma X C, Hu J P, Chen X and Xue Q K 2011 Nat. Phys. 8 126
21 Wang Z, Song Y J, Shi H L, Wang Z W, Chen Z, Tian H F, Chen G F, Guo J G, Yang H Y and Li J Q 2011 Phys. Rev. B 83 140505
22 Wei B, Huang Q Z, Chen G F, Green M A, Wang D M, He J B and Qiu Y M 2011 Chin. Phys. Lett. 28 086104
23 Wang M, Wang M Y, Li G N, Huang Q, Li C H, Tan G T, Zhang C L, Cao H B, Tian W, Zhao Y, Chen Y C, Lu X Y, Sheng B, Luo H Q, Li S L, Fang M H, Zarestky H J, Ratcliff W, Lumsden M D, Lynn J W and Dai P C 2011 Phys. Rev. B 84 094504
24 Zhao J, Cao H B, Courchesne E B, Lee D H and Birgeneau R J 2012 Phys. Rev. Lett. 109 267003
25 Shermadini A, Krzton-Maziopa A, Bendele M, Khasanov M, Luetkens H, Conder K, Pomjakushina E, Weyeneth S, Pomjakushin V, Bossen O and Amato A 2011 Phys. Rev. Lett. 106 117602
26 Texier Y, Deisenhofer J, Tsurkan V, Loidl A, Inosov D S, Friemel G and Bobroff J 2012 Phys. Rev. Lett. 108 237002
27 Ricci A, Poccia N, Campi G, Joseph B, Arrighetti G, Barba L, Reynolds M, Burghammer M, Takeya H, Mizuguchi Y, Takano Y, Colapietro M, Saini N L and Bianconi A 2011 Phys. Rev. B 84 060511
28 Shoemaker D P, Chung D Y, Claus H, Francisco M C, Llobet S A and Kanatzidis M G 2012 Phys. Rev. B 86 184511
29 Guo J, Chen X J, Dai J H, Zhang C, Guo J G, Chen X L, Wu Q, Gu D C, Gao P W, Yang L H, Yang H, Dai X, Mao H K, Sun L L and Zhao Z X 2012 Phys. Rev. Lett. 108 197001
30 Shen B, Zeng B, Chen G F, He J B, Wang D M, Yang H and Wen H H 2011 Europhys. Lett. 96 37010
31 Yuan R H, Dong T, Song Y J, Zhang P, Chen G F, Hu J P and Wang N L 2011 Scientific Reports 2 221
32 Ding X X, Fang D L, Wang Z Y, Yang H, Liu J Z, Deng Q, Ma G B, Meng C, Hu Y H and Wen H H 2013 Nat. Commun. 4 1897
33 Fang L, Luo H Q, Cheng P, Wang Z S, Jia J, Mu G, Shen B, Mazin I I, Shan L, Ren C and Wen H H 2009 Phys. Rev. B 80 140508
34 Dutta P, Dimon P and Horn P M 1979 Phys. Rev. Lett. 43 646
35 Raquet B, Coey J M D, Wirth S and von Molnar S 1999 Phys. Rev. B 59 12435
36 Müller J, Brandenburg J and Schlueter J A 2009 Phys. Rev. B 79 214521
37 Deutscher G1983 Percolation, Localization, and Superconductivity(NATO Science Series Vol. 109 Springer) P. 95
38 Testa J A, Yi Song, Chen X D, Golben J, Lee S I, Patton B R and Gaines J R 1988 Phys. Rev. B 38 2922
39 Kiss L B, Larsson T and Svedlindh P 1993 Physica C 207 318
40 Müller J, Brandenburg J and Schlueter J A 2009 Phys. Rev. Lett. 102 047004
41 Rammal R, Tannous C, Breton P and Tremblay A M S 1985 Phys. Rev. Lett. 54 1718
42 Kogan S1996 Electronic Niose and Fluctuations in Solids (Cambridge: Cambridge University Press)
43 Kiss L B and Svedlindh P 1993 Phys. Rev. Lett. 71 2817 |
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