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Bozovic, I.; Wu, J.; He, X.; Bollinger, A. T.
Brookhaven National Laboratory (BNL), Upton, NY (United States). Funding organisation: USDOE Office of Science - SC, Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division (United States); Gordon and Betty Moore Foundation (United States)2018
Brookhaven National Laboratory (BNL), Upton, NY (United States). Funding organisation: USDOE Office of Science - SC, Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division (United States); Gordon and Betty Moore Foundation (United States)2018
AbstractAbstract
[en] Over the course of three decades of intense study, apart from the exceptionally high critical temperature, many unusual properties of cuprates have been discovered, notably including resistivity linear in temperature, electronic Raman continuum and optical absorption extending throughout the infrared region, pseudogap, hour-glass spin excitation spectrum, etc. However, each of these features have been also observed in other materials, including some that are not even superconducting at all. Here, we describe an extensive experiment in which over 2,000 films of the La2-xSrxCuO4 have been synthesized and studied in detail over the course of the last twelve years. We argue here that, uniquely, in the cuprates an unusual superconducting state, that defies the standard BCS description, develops from an unusual metallic state, in which the rotational symmetry of the electron fluid is spontaneously broken.
Source
BNL--203407-2018-JAAM; OSTIID--1430864; SC0012704; GBMF4410; Available from https://www.osti.gov/pages/biblio/1430864; DOE Accepted Manuscript full text, or the publishers Best Available Version will be available free of charge after the embargo period; arXiv:1801.03505; Country of input: United States
Record Type
Journal Article
Journal
Physica. C, Superconductivity; ISSN 0921-4534;
; (2018 issue); vp

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
Olson Reichhardt, C. J.; Wang, Y. L.; Argonne National Laboratory; Xiao, Z. L.; Northern Illinois University, DeKalb, IL
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Funding organisation: USDOE National Nuclear Security Administration (NNSA) (United States)
arXiv e-print [ PDF ]2016
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Funding organisation: USDOE National Nuclear Security Administration (NNSA) (United States)
arXiv e-print [ PDF ]2016
AbstractAbstract
[en] A conformal pinning array can be created by conformally transforming a uniform triangular pinning lattice to produce a new structure in which the six-fold ordering of the original lattice is conserved but where there is a spatial gradient in the density of pinning sites. Here we examine several aspects of vortices interacting with conformal pinning arrays and how they can be used to create a flux flow diode effect for driving vortices in different directions across the arrays. Under the application of an ac drive, a pronounced vortex ratchet effect occurs where the vortices flow in the easy direction of the array asymmetry. When the ac drive is applied perpendicular to the asymmetry direction of the array, it is possible to realize a transverse vortex ratchet effect where there is a generation of a dc flow of vortices perpendicular to the ac drive due to the creation of a noise correlation ratchet by the plastic motion of the vortices. We also examine vortex transport in experiments and compare the pinning effectiveness of conformal arrays to uniform triangular pinning arrays. In conclusion, we find that a triangular array generally pins the vortices more effectively at the first matching field and below, while the conformal array is more effective at higher fields where interstitial vortex flow occurs.
Source
LA-UR--16-20083; OSTIID--1338737; AC52-06NA25396; Available from http://www.osti.gov/pages/biblio/1338737; DOE Accepted Manuscript full text, or the publishers Best Available Version will be available free of charge after the embargo period; Country of input: United States
Record Type
Journal Article
Journal
Physica. C, Superconductivity; ISSN 0921-4534;
; v. 533; vp

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
Chuang, Y. D; Gromko, A. D; Dessau, D. S; Nakamura, K.; Ando, Y.
Ernest Orlando Lawrence Berkeley National Lab., Advanced Light Source, Berkeley, CA (United States). Funding organisation: US Department of Energy (United States)2000
Ernest Orlando Lawrence Berkeley National Lab., Advanced Light Source, Berkeley, CA (United States). Funding organisation: US Department of Energy (United States)2000
AbstractAbstract
No abstract available
Source
LBNL/ALS--43476; AC03-76SF00098; Journal Publication Date: November 2000
Record Type
Journal Article
Journal
Physica. C, Superconductivity; ISSN 0921-4534;
; v. 341-348; [10 p.]

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Kurmaev, Ernst Z.; Moewes, Alexander P.; Zhigadlo, N.D.; Takayama-Muromachi, E.; Yarmoshenko, Y.M.; Shamin, S.N.; Nekrasov, I.A.; Bureev, O.A.; Ederer, D.L.
Ernest Orlando Lawrence Berkeley National Lab., Advanced Light Source, Berkeley, CA (United States). Funding organisation: US Department of Energy (United States)2001
Ernest Orlando Lawrence Berkeley National Lab., Advanced Light Source, Berkeley, CA (United States). Funding organisation: US Department of Energy (United States)2001
AbstractAbstract
No abstract available
Source
LBNL/ALS--43400; AC03-76SF00098; Journal Publication Date: October 15 2001
Record Type
Journal Article
Journal
Physica. C, Superconductivity; ISSN 0921-4534;
; v. 363(1); [10 p.]

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Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Guo, Xinglong; Wang, Li; Pan, Heng; Wu, Hong; Liu, Xiaokun; Chen, Anbin; Green, M.A.; Xu, F.Y.
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States). Funding organisation: Accelerator and Fusion Research Division (United States); Engineering Division (United States)2009
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States). Funding organisation: Accelerator and Fusion Research Division (United States); Engineering Division (United States)2009
AbstractAbstract
[en] Accurate analysis of over voltage in the superconducting solenoid during a quench is one of the bases for quench protection system design. Classical quench simulation methods can only give rough estimation of the over voltage within a magnet coil. In this paper, for multi-sectioned superconducting solenoid, based on the classical assumption of ellipsoidal normal zone, three-dimension al temperature results are mapped to the one-dimension of the wire, the temperature distribution along the wire and the resistances of each turn are obtained. The coil is treated as circuit comprised of turn resistances, turn self and mutual inductances. The turn resistive voltage, turn inductive voltage, and turn resultant voltage along the wire are calculated. As a result, maximum internal voltages, the layer-to-layer voltages and the turn-to-turn voltages are better estimated. Utilizing this method, the over voltage of a small solenoid and a large solenoid during quenching have been studied. The result shows that this method can well improve the over voltage estimate, especially when the coil is larger.
Primary Subject
Secondary Subject
Source
LBNL--2533E; AC02-05CH11231; Available from OSTI as DE00973378; PURL: https://www.osti.gov/servlets/purl/973378-K5Y1Vs/
Record Type
Journal Article
Journal
Physica. C, Superconductivity; ISSN 0921-4534;
; (Issue Jun 2009); p. 6

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Maroni, V.A.; Venkataraman, K.; Kropf, A.J.; Segre, C.U.; Huang, Y.; Riley, G.N.
Argonne National Laboratory (United States). Funding organisation: USDOE Office of Energy Efficiency and Renewable Energy (United States); USDOE Office of Science (United States)
arXiv e-print [ PDF ]2002
Argonne National Laboratory (United States). Funding organisation: USDOE Office of Energy Efficiency and Renewable Energy (United States); USDOE Office of Science (United States)
arXiv e-print [ PDF ]2002
AbstractAbstract
[en] X-ray diffraction (XRD) measurements were made on silver-sheathed (Bi,Pb)2Sr2Ca2Cu3Ox (Ag/Bi-2223) composite superconductor using 25 keV X-rays produced by an insertion device beamline at a third generation synchrotron. These measurements, performed on fully sheathed multifilament-type Ag/Bi-2223 wire specimens, provided high resolution diffraction patterns that revealed (1) the phases present in the cores of the superconducting filaments and (2) the nature and quality of the Bi-2223 grain colony texture. In addition to the Bi-2223 phase, we were able to detect and to monitor specimen-to-specimen variations in the relative amounts of Bi-2212, Bi-2201, and the '3221' phase. The scattering geometry used (X-ray beam perpendicular to the Ag/Bi-2223 conductor rolling direction) resulted in the detection of several remarkably intense diffraction lines of Bi-2223, most notably the (2 0 0)/(0 2 0) pair, that were highly useful for recording pole figure maps evidencing the contiguous fiber texture microstructure of the Bi-2223 grain colonies. The nondestructive nature of the 25 keV transmission XRD method offers many advantages for the comprehensive study of phase evolution and microstructure development in Ag/Bi-2223 composite conductors.
Source
ANL/CMT/JA--41807; AC02-06CH11357
Record Type
Journal Article
Journal
Physica. C, Superconductivity; ISSN 0921-4534;
; v. 382(1); p. 21-26

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Wu, J.; Bollinger, A. T.; He, X.; Yale University, New Haven, CT; Bozovic, I.; Yale University, New Haven, CT
Brookhaven National Laboratory (BNL), Upton, NY (United States). Funding organisation: USDOE Office of Science - SC, Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division (United States); Gordon and Betty Moore Foundation (United States)2018
Brookhaven National Laboratory (BNL), Upton, NY (United States). Funding organisation: USDOE Office of Science - SC, Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division (United States); Gordon and Betty Moore Foundation (United States)2018
AbstractAbstract
[en] Here, we describe an extensive experimental study of La2-xSrxCuO4 films synthesized by molecular beam epitaxy and investigated by angle-resolved measurements of transverse resistivity (without applied magnetic field). The data show that an unusual metallic state, in which the rotational symmetry of the electron fluid is spontaneously broken, occurs in a large temperature and doping region. The superconducting state always emerges out of this nematic metal state.
Secondary Subject
Source
BNL--203408-2018-JAAM; OSTIID--1430865; SC0012704; GBMF4410; Available from https://www.osti.gov/pages/biblio/1430865; DOE Accepted Manuscript full text, or the publishers Best Available Version will be available free of charge after the embargo period; arXiv:1801.03505; Country of input: United States
Record Type
Journal Article
Journal
Physica. C, Superconductivity; ISSN 0921-4534;
; v. 549(C); p. 95-98

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
Kurmaev, E.Z.; Poteryaev, A.I.; Anisimov, V.I.; Karla, I.; Moewes, A.; Schneider, B.; Neumann, M.; Ederer, D.L.; Lyubovskaya, R.N.
Ernest Orlando Lawrence Berkeley National Lab., Advanced Light Source, Berkeley, CA (United States). Funding organisation: US Department of Energy (United States)1999
Ernest Orlando Lawrence Berkeley National Lab., Advanced Light Source, Berkeley, CA (United States). Funding organisation: US Department of Energy (United States)1999
AbstractAbstract
No abstract available
Source
LBNL/ALS--31197; AC03-76SF00098; Journal Publication Date: August 20 1999
Record Type
Journal Article
Journal
Physica. C, Superconductivity; ISSN 0921-4534;
; v. 321(3-4); [10 p.]

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Chopdekar, R.V.; Wong, F.; Takamura, Y.; Arenholz, E.; Suzuki, Y.
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States). Funding organisation: Advanced Light Source Division (United States)
arXiv e-print [ PDF ]2009
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States). Funding organisation: Advanced Light Source Division (United States)
arXiv e-print [ PDF ]2009
AbstractAbstract
[en] Epitaxial films of LiTi2O4 on single crystalline substrates of MgAl2O4, MgO, and SrTiO3 provide model systems to systematically explore the effects of lattice strain and microstructural disorder on the superconducting state. Lattice strain that affects bandwidth gives rise to variations in the superconducting and normal state properties. Microstructural disorder, such as antiphase boundaries that give rise to Ti network disorder, reduces the critical temperature, and Ti network disorder combined with Mg interdiffusion lead to a much more dramatic effect on the superconducting state. Surface sensitive X-ray absorption spectroscopy has identified Ti to retain site symmetry and average valence of the bulk material regardless of film thickness
Source
LBNL--2122E; AC02-05CH11231; Available from OSTI as DE00963321; PURL: https://www.osti.gov/servlets/purl/963321-LjXRvH/
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
Ma, B.; Li, M.; Koritala, R.E.; Fisher, B.L.; Dorris, S.E.; Maroni, V.A.; Miller, D.J.; Balachandran, U.
Argonne National Laboratory (United States). Funding organisation: USDOE Office of Energy Efficiency and Renewable Energy (United States)2002
Argonne National Laboratory (United States). Funding organisation: USDOE Office of Energy Efficiency and Renewable Energy (United States)2002
AbstractAbstract
[en] YBCO thin films were directly deposited on mechanically polished nontextured silver (Ag) substrates at elevated temperature by pulsed laser deposition with various inclination angles of 35, 55, and 72. Strong fiber texture, with the c-axis parallel to the substrate normal was detected by X-ray diffraction pole figure analysis. Atomic force microscopy and scanning electron microscopy images revealed that a few a-axis-oriented grains were dispersed on the top surface of the YBCO films. Transmission electron microscopy revealed dense amorphous layer at the interface between the YBCO film and the Ag substrate. Energy dispersive spectrum analysis indicates that the YBCO film deposited on the Ag substrate is slightly Cu-deficient. A YBCO film deposited at 755 C and an inclination angle of 55 exhibited (Tc) = 90 K. Transport critical current density measured by the four-probe method at 77 K in self-field was 2.7 x 105A/cm2. This work demonstrated a simple and inexpensive method to fabricate YBCO-coated conductors with high critical current density.
Source
ANL/ET/JA--41016; AC02-06CH11357
Record Type
Journal Article
Journal
Physica. C, Superconductivity; ISSN 0921-4534;
; v. 377(4); p. 501-506

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
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