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Non-Gaussian tail in the force distribution: a hallmark of correlated disorder in the host media of elastic objects. Sci Rep 2020; 10:19452. [PMID: 33173105 PMCID: PMC7655960 DOI: 10.1038/s41598-020-76529-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 10/09/2020] [Indexed: 11/11/2022] Open
Abstract
Inferring the nature of disorder in the media where elastic objects are nucleated is of crucial importance for many applications but remains a challenging basic-science problem. Here we propose a method to discern whether weak-point or strong-correlated disorder dominates based on characterizing the distribution of the interaction forces between objects mapped in large fields-of-view. We illustrate our proposal with the case-study system of vortex structures nucleated in type-II superconductors with different pinning landscapes. Interaction force distributions are computed from individual vortex positions imaged in thousands-vortices fields-of-view in a two-orders-of-magnitude-wide vortex-density range. Vortex structures nucleated in point-disordered media present Gaussian distributions of the interaction force components. In contrast, if the media have dilute and randomly-distributed correlated disorder, these distributions present non-Gaussian algebraically-decaying tails for large force magnitudes. We propose that detecting this deviation from the Gaussian behavior is a fingerprint of strong disorder, in our case originated from a dilute distribution of correlated pinning centers.
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He X, Wen Y, Zhang C, Lai Z, Chudnovsky EM, Zhang X. Enhancement of critical current density in a superconducting NbSe 2 step junction. NANOSCALE 2020; 12:12076-12082. [PMID: 32478360 DOI: 10.1039/d0nr03902k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We investigate the transport properties of a NbSe2 nanodevice consisting of a thin region, a thick region and a step junction. The superconducting critical current density of each region of the nanodevice has been studied as a function of temperature and magnetic field. We find that the critical current density has similar values for both the thin and thick regions away from the junction, while the critical current density of the thin region of the junction increases to approximately 1.8 times as compared with the values obtained for the other regions. We attribute such an enhancement of critical current density to the vortex pinning at the surface step. Our study verifies the enhancement of the critical current density by the geometrical-type pinning and sheds light on the application of 2D superconductors.
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Affiliation(s)
- Xin He
- Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Yan Wen
- Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Chenhui Zhang
- Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Zhiping Lai
- Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Eugene M Chudnovsky
- Physics Department, Lehman College and Graduate School, The City University of New York, 250 Bedford Park Boulevard West, Bronx, New York 10468-1589, USA.
| | - Xixiang Zhang
- Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
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Study of flux pinning mechanism under hydrostatic pressure in optimally doped (Ba,K)Fe2As2 single crystals. Sci Rep 2016; 6:23044. [PMID: 26983500 PMCID: PMC4794803 DOI: 10.1038/srep23044] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 02/23/2016] [Indexed: 11/25/2022] Open
Abstract
Strong pinning depends on the pinning force strength and number density of effective defects. Using the hydrostatic pressure method, we demonstrate here that hydrostatic pressure of 1.2 GPa can significantly enhance flux pinning or the critical current density (Jc) of optimally doped Ba0.6K0.4Fe2As2 crystals by a factor of up to 5 in both low and high fields, which is generally rare with other Jc enhancement techniques. At 4.1 K, high pressure can significantly enhance Jc from 5 × 105 A/cm2 to nearly 106 A/cm2 at 2 T, and from 2 × 105 A/cm2 to nearly 5.5 × 105 A/cm2 at 12 T. Our systematic analysis of the flux pinning mechanism indicates that both the pinning centre number density and the pinning force are greatly increased by the pressure and enhance the pinning. This study also shows that superconducting performance in terms of flux pinning or Jc for optimally doped superconducting materials can be further improved by using pressure.
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Menghini M, Fasano Y, de la Cruz F, Banerjee SS, Myasoedov Y, Zeldov E, van der Beek CJ, Konczykowski M, Tamegai T. First-order phase transition from the vortex liquid to an amorphous solid. PHYSICAL REVIEW LETTERS 2003; 90:147001. [PMID: 12731938 DOI: 10.1103/physrevlett.90.147001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2002] [Indexed: 05/24/2023]
Abstract
We present a systematic study of the topology of the vortex solid phase in superconducting Bi2Sr2CaCu2O8 samples with low doses of columnar defects. A new state of vortex matter imposed by the presence of geometrical contours associated with the random distribution of columns is found. The results show that the first-order liquid-solid transition in this vortex matter does not require a structural symmetry change.
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Affiliation(s)
- M Menghini
- Instituto Balseiro and Centro Atómico Bariloche, CNEA, Bariloche, 8400, Argentina
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5
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Observation of dynamic interaction of vortices with ion irradiated defects by Lorentz microscopy. Ultramicroscopy 1997. [DOI: 10.1016/s0304-3991(96)00100-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Kim P, Yao Z, Lieber CM. Vortex Lattice Structure in Bi2Sr2CaCu2O8+ delta at High Temperatures. PHYSICAL REVIEW LETTERS 1996; 77:5118-5121. [PMID: 10062718 DOI: 10.1103/physrevlett.77.5118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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7
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Maurer SM, Yeh N, Tombrello TA. Vortex pinning by cylindrical defects in type-II superconductors: Numerical solutions to the Ginzburg-Landau equations. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:15372-15379. [PMID: 9985603 DOI: 10.1103/physrevb.54.15372] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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8
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Harada K, Kamimura O, Kasai H, Matsuda T, Tonomura A, Moshchalkov VV. Direct Observation of Vortex Dynamics in Superconducting Films with Regular Arrays of Defects. Science 1996; 274:1167-70. [PMID: 8895460 DOI: 10.1126/science.274.5290.1167] [Citation(s) in RCA: 122] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The microscopic mechanism of the matching effect in a superconductor, which manifested itself as the production of peaks or cusps in the critical current at specific values of the applied magnetic field, was investigated with Lorentz microscopy to allow direct observation of the behavior of vortices in a niobium thin film having a regular array of artificial defects. Vortices were observed to form regular and consequently rigid lattices at the matching magnetic field, at its multiples, and at its fractions. The dynamic observation furthermore revealed that vortices were most difficult to move at the matching field, whereas excess vortices moved easily.
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Affiliation(s)
- K Harada
- K. Harada, O. Kamimura, H. Kasai, T. Matsuda, A. Tonomura, Advanced Research Laboratory, Hitachi, Ltd., Hatoyama, Saitama 350-03, Japan. V. V. Moshchalkov, Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium
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9
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Yang P, Lieber CM. Nanorod-Superconductor Composites: A Pathway to Materials with High Critical Current Densities. Science 1996. [DOI: 10.1126/science.273.5283.1836] [Citation(s) in RCA: 477] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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10
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Lieber CM, Liu J, Sheehan PE. Anorganische Materialien mit Hilfe von Rastersondenmikroskopen verstehen und manipulieren. Angew Chem Int Ed Engl 1996. [DOI: 10.1002/ange.19961080704] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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11
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Reichhardt C, Olson CJ, Groth J, Field S, Nori F. Vortex plastic flow, local flux density, magnetization hysteresis loops, and critical current, deep in the Bose-glass and Mott-insulator regimes. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:R8898-R8901. [PMID: 9982480 DOI: 10.1103/physrevb.53.r8898] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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12
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Harada K, Kasai H, Kamimura O, Matsuda T, Tonomura A, Okayasu S, Kazumata Y. Observation of dynamic flux-line relaxation in ion-irradiated Bi2Sr1.8CaCu2Ox by Lorentz microscopy. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:9400-9405. [PMID: 9982444 DOI: 10.1103/physrevb.53.9400] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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13
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Täuber UC, Nelson DR. Interactions and pinning energies in the Bose glass phase of vortices in superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:16106-16124. [PMID: 9980994 DOI: 10.1103/physrevb.52.16106] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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14
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Pastoriza H, Kes PH. Direct shear probe of vortex lattice melting in Bi2Sr2CaCu2O8 single crystals. PHYSICAL REVIEW LETTERS 1995; 75:3525-3528. [PMID: 10059608 DOI: 10.1103/physrevlett.75.3525] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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15
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Yoon S, Yao Z, Dai H, Lieber CM. Elastic Properties of Flux-Line Arrays in High Transition Temperature Superconductors Probed by Two-Sided Decoration. Science 1995. [DOI: 10.1126/science.270.5234.270] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Seokwon Yoon
- Division of Applied Sciences and Department of Chemistry, Harvard University, Cambridge, MA 02138, USA
| | - Zhen Yao
- Division of Applied Sciences and Department of Chemistry, Harvard University, Cambridge, MA 02138, USA
| | - Hongjie Dai
- Division of Applied Sciences and Department of Chemistry, Harvard University, Cambridge, MA 02138, USA
| | - Charles M. Lieber
- Division of Applied Sciences and Department of Chemistry, Harvard University, Cambridge, MA 02138, USA
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Täuber UC, Dai H, Nelson DR, Lieber CM. Coulomb gap and correlated vortex pinning in superconductors. PHYSICAL REVIEW LETTERS 1995; 74:5132-5135. [PMID: 10058691 DOI: 10.1103/physrevlett.74.5132] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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17
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Schuster T, Kuhn H, Indenbom M, Leghissa M, Kraus M, Konczykowski M. Critical-current anisotropy due to inclined and crossed linear defects. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:16358-16370. [PMID: 9978619 DOI: 10.1103/physrevb.51.16358] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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