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Kuveždić M, Tafra E, Figueroa IA, Basletić M. (Magneto)Transport Properties of (TiZrNbNi) 1-xCu x and (TiZrNbCu) 1-xCo x Complex Amorphous Alloys. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1711. [PMID: 36837341 PMCID: PMC9965643 DOI: 10.3390/ma16041711] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 02/09/2023] [Accepted: 02/15/2023] [Indexed: 06/18/2023]
Abstract
We present a systematic study of electrical resistivity, superconductive transitions and the Hall effect for three systems of compositionally complex amorphous alloys of early (TE) and late (TL) transition metals: (TiZrNbNi)1-xCux and (TiZrNbCu)1-xCox in a broad composition range of 0<x<0.5 as well as Ti0.30Zr0.15Nb0.15Cu0.2Ni0.2, Ti0.15Zr0.30Nb0.15Cu0.2Ni0.2 and Ti0.15Zr0.15Nb0.30Cu0.2Ni0.2. All samples showed high resistivity at room temperature, 140-240 μΩ cm, and the superconducting transition temperatures decreased with increasing late transition metal content, similar to binary amorphous and crystalline high-entropy TE-TL alloys. The Hall coefficient RH was temperature-independent and positive for all samples (except for (TiZrNbCu)0.57Co0.43), in good agreement with binary TE-TL alloys. Finally, for the temperature dependence of resistivity, as far as the authors are aware, we present a new model with two conduction channels, one of them being variable range hopping, such as the parallel conduction mode in the temperature range 20-200 K, with the exponent p=1/2. We examine this in the context of variable range hopping in granular metals.
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Affiliation(s)
- Marko Kuveždić
- Department of Physics, Faculty of Science, University of Zagreb, Bijenička Cesta 32, 10000 Zagreb, Croatia
| | - Emil Tafra
- Department of Physics, Faculty of Science, University of Zagreb, Bijenička Cesta 32, 10000 Zagreb, Croatia
| | - Ignacio A. Figueroa
- Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México (UNAM), Circuito Exterior s/n, Cd. Universitaria, Ciudad de México 04510, Mexico
| | - Mario Basletić
- Department of Physics, Faculty of Science, University of Zagreb, Bijenička Cesta 32, 10000 Zagreb, Croatia
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2
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Morris J. Electron Transport in Discontinuous Metal Thin Films. NANO EXPRESS 2022. [DOI: 10.1088/2632-959x/ac550c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
The structure and basic experimental electrical properties of vacuum evaporated discontinuous (island) metal thin films of discrete metal nanoparticles on insulating substrates are briefly reviewed. Then the widely accepted Neugebauer and Webb (N&W) electrostatically activated electron tunneling conduction model is covered (with enhancements) before the numerous discrepancies between this model and experimental observations are identified, e.g. minimal substrate bias effect, non-linear field distribution, anomalous AC effects, asymmetrical contact effects, and switching. A modified model, based on contact electron injection and extraction, and computer simulations are introduced which explain these discrepancies at a qualitative level. However, quantitative experimental verification of the model is not possible without stable, reproducible films of known structures. The paper concludes with a review of possible preparation techniques which could yield satisfactory samples, especially self-assembly of organically protected metal nanoparticles. One of these has already demonstrated electrostatically activated conduction.
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Magnetotransport Properties of Ferromagnetic Nanoparticles in a Semiconductor Matrix Studied by Precise Size-Selective Cluster Ion Beam Deposition. NANOMATERIALS 2020; 10:nano10112192. [PMID: 33153149 PMCID: PMC7693789 DOI: 10.3390/nano10112192] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 10/27/2020] [Accepted: 10/30/2020] [Indexed: 01/26/2023]
Abstract
The combination of magnetic and semiconducting properties in one material system has great potential for integration of emerging spintronics with conventional semiconductor technology. One standard route for the synthesis of magnetic semiconductors is doping of semiconductors with magnetic atoms. In many semiconductor–magnetic–dopant systems, the magnetic atoms form precipitates within the semiconducting matrix. An alternative and controlled way to realize such nanocomposite materials is the assembly by co-deposition of size-selected cluster ions and a semiconductor. Here we follow the latter approach to demonstrate that this fabrication route can be used to independently study the influence of cluster concentration and cluster size on magneto-transport properties. In this case we study Fe clusters composed of approximately 500 or 1000 atoms soft-landed into a thermally evaporated amorphous Ge matrix. The analysis of field and temperature dependent transport shows that tunneling processes affected by Coulomb blockade dominate at low temperatures. The nanocomposites show saturating tunneling magnetoresistance, additionally superimposed by at least one other effect not saturating upon the maximum applied field of 6 T. The nanocomposites’ resistivity and the observed tunneling magnetoresistance depend exponentially on the average distance between cluster surfaces. On the contrary, there is no notable influence of the cluster size on the tunneling magnetoresistance.
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Samadi Khoshkhoo M, Maiti S, Schreiber F, Chassé T, Scheele M. Surface Functionalization with Copper Tetraaminophthalocyanine Enables Efficient Charge Transport in Indium Tin Oxide Nanocrystal Thin Films. ACS APPLIED MATERIALS & INTERFACES 2017; 9:14197-14206. [PMID: 28398030 DOI: 10.1021/acsami.7b00555] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Macroscopic superlattices of tin-doped indium oxide (ITO) nanocrystals (NCs) are prepared by self-assembly at the air/liquid interface followed by simultaneous ligand exchange with the organic semiconductor copper 4,4',4″,4‴-tetraaminophthalocyanine (Cu4APc). By using X-ray photoelectron spectroscopy (XPS), grazing-incidence small-angle X-ray scattering (GISAXS), and ultraviolet-visible-near-infrared (UV-vis-NIR) spectroscopy, we demonstrate that the semiconductor molecules largely replace the native surfactant from the ITO NC surface and act as cross-linkers between neighboring particles. Transport measurements reveal an increase in electrical conductance by 9 orders of magnitude, suggesting that Cu4APc provides efficient electronic coupling for neighboring ITO NCs. This material provides the opportunity to study charge and spin transport through phthalocyanine monolayers.
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Affiliation(s)
- Mahdi Samadi Khoshkhoo
- Institute of Physical and Theoretical Chemistry, ‡Institute of Applied Physics, and §Center for Light-Matter Interaction, Sensors & Analytics LISA+, University of Tübingen , 72076 Tübingen, Germany
| | - Santanu Maiti
- Institute of Physical and Theoretical Chemistry, ‡Institute of Applied Physics, and §Center for Light-Matter Interaction, Sensors & Analytics LISA+, University of Tübingen , 72076 Tübingen, Germany
| | - Frank Schreiber
- Institute of Physical and Theoretical Chemistry, ‡Institute of Applied Physics, and §Center for Light-Matter Interaction, Sensors & Analytics LISA+, University of Tübingen , 72076 Tübingen, Germany
| | - Thomas Chassé
- Institute of Physical and Theoretical Chemistry, ‡Institute of Applied Physics, and §Center for Light-Matter Interaction, Sensors & Analytics LISA+, University of Tübingen , 72076 Tübingen, Germany
| | - Marcus Scheele
- Institute of Physical and Theoretical Chemistry, ‡Institute of Applied Physics, and §Center for Light-Matter Interaction, Sensors & Analytics LISA+, University of Tübingen , 72076 Tübingen, Germany
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5
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Structural, electron transportation and magnetic behavior transition of metastable FeAlO granular films. Sci Rep 2016; 6:24410. [PMID: 27075955 PMCID: PMC4830969 DOI: 10.1038/srep24410] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 03/29/2016] [Indexed: 11/08/2022] Open
Abstract
Metal-insulator granular film is technologically important for microwave applications. It has been challenging to obtain simultaneous high electrical resistivity and large saturation magnetization due to the balance of insulating non-magnetic and metallic magnetic components. FeAlO granular films satisfying both requirements have been prepared by pulsed laser deposition. The as-deposited film exhibits a high resistivity of 3700 μΩ∙cm with a negative temperature coefficient despite that Fe content (0.77) exceeds the percolation threshold. This originates from its unique microstructure containing amorphous Fe nanoparticles embedded in Al2O3 network. By optimizing the annealing conditions, superior electromagnetic properties with enhanced saturation magnetization (>1.05 T), high resistivity (>1200 μΩ∙cm) and broadened Δf (>3.0 GHz) are obtained. Phase separation with Al2O3 aggregating as inclusions in crystallized Fe(Al) matrix is observed after annealing at 673 K, resulting in a metallic-like resistivity. We provide a feasible way to achieve both high resistivity and large saturation magnetization for the FeAlO films with dominating metallic component and show that the microstructure can be tuned for desirable performance.
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Zhang H, Lu J, Shi W, Wang Z, Zhang T, Sun M, Zheng Y, Chen Q, Wang N, Lin JJ, Sheng P. Large-scale mesoscopic transport in nanostructured graphene. PHYSICAL REVIEW LETTERS 2013; 110:066805. [PMID: 23432290 DOI: 10.1103/physrevlett.110.066805] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Indexed: 06/01/2023]
Abstract
Through exponential sample-size scaling of conductance, we demonstrate strong electron localization in three sets of nanostructured antidot graphene samples with localization lengths of 1.1, 2, and 3.4 μm. The large-scale mesoscopic transport is manifest as a parallel conduction channel to 2D variable range hopping, with a Coulomb quasigap around the Fermi level. The opening of the correlation quasigap, observable below 25 K through the temperature dependence of conductance, makes possible the exponential suppression of inelastic electron-electron scatterings and thereby leads to an observed dephasing length of 10 μm.
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Affiliation(s)
- Haijing Zhang
- Department of Physics and William Mong Institute of Nano Science and Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong, China
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Sachser R, Porrati F, Schwalb CH, Huth M. Universal conductance correction in a tunable strongly coupled nanogranular metal. PHYSICAL REVIEW LETTERS 2011; 107:206803. [PMID: 22181756 DOI: 10.1103/physrevlett.107.206803] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Indexed: 05/25/2023]
Abstract
We present temperature-dependent conductivity data obtained on a sample set of nanogranular Pt-C with finely tuned intergrain tunnel coupling strength g. For samples in the strong-coupling regime g > g(C), characterized by a finite conductivity for T→0, we find a logarithmic behavior at elevated temperatures and a crossover to a √T behavior at low temperatures over a wide range of coupling strengths g(C) ≈ 0.25 < g ≤ 3. The experimental observation for g > 1 is in very good agreement with recent theoretical findings on ordered granular metals in three spatial dimensions. The results indicate a validity of the predicted universal conductivity behavior that goes beyond the immediate range of the approach used in the theoretical derivation.
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Affiliation(s)
- Roland Sachser
- Physikalisches Institut, Goethe-Universität, Frankfurt am Main, Germany.
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Knížek K, Hejtmánek J, Maryško M, Šantavá E, Jirák Z, Buršík J, Kirakci K, Beran P. Structure and properties of a novel cobaltate La0.30CoO2. J SOLID STATE CHEM 2011. [DOI: 10.1016/j.jssc.2011.06.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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9
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Kemp NT, Newbury R, Cochrane JW, Dujardin E. Electronic transport in conducting polymer nanowire array devices. NANOTECHNOLOGY 2011; 22:105202. [PMID: 21289409 DOI: 10.1088/0957-4484/22/10/105202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report on the temperature dependent conductivity and current-voltage (I-V) properties of novel polyaniline nanowire array devices. Below 60 K, I-V measurements show a transition to non-linear behaviour, leading to the onset at 30 K of a threshold voltage, for potentials below which little current flows. By considering an intrinsic morphology of small conducting regions separated by tunnel junctions, we show that charging of the conducting regions leads to Coulomb blockade effects that can account for this behaviour.
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Affiliation(s)
- N T Kemp
- Department of Physics, The University of Hull, Kingston-upon-Hull HU6 7RX, UK.
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Zebarjadi M, Esfarjani K, Bian Z, Shakouri A. Low-temperature thermoelectric power factor enhancement by controlling nanoparticle size distribution. NANO LETTERS 2011; 11:225-230. [PMID: 21141996 DOI: 10.1021/nl103581z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Coherent potential approximation is used to study the effect of adding doped spherical nanoparticles inside a host matrix on the thermoelectric properties. This takes into account electron multiple scatterings that are important in samples with relatively high volume fraction of nanoparticles (>1%). We show that with large fraction of uniform small size nanoparticles (∼1 nm), the power factor can be enhanced significantly. The improvement could be large (up to 450% for GaAs) especially at low temperatures when the mobility is limited by impurity or nanoparticle scattering. The advantage of doping via embedded nanoparticles compared to the conventional shallow impurities is quantified. At the optimum thermoelectric power factor, the electrical conductivity of the nanoparticle-doped material is larger than that of impurity-doped one at the studied temperature range (50-500 K) whereas the Seebeck coefficient of the nanoparticle doped material is enhanced only at low temperatures (∼50 K).
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Affiliation(s)
- Mona Zebarjadi
- Department of Electrical Engineering, University of California, Santa Cruz, California 95064, United States
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11
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Okada K, Kohiki S, Mitome M, Tanaka H, Arai M, Mito M, Deguchi H. Magnetoresistance and microstructure of magnetite nanocrystals dispersed in indium-tin oxide thin films. ACS APPLIED MATERIALS & INTERFACES 2009; 1:1893-1898. [PMID: 20355811 DOI: 10.1021/am9003057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Epitaxial indium-tin oxide (ITO) thin films were fabricated on a yttria-stabilized zirconia (YSZ) substrate by pulsed-laser deposition using magnetite (Fe(3)O(4)) nanoparticle dispersed ITO powders as a target. Magnetoresistance of the film at a field of 1 T was 39% at 45 K, and it stayed at 3% above 225 K. The film demonstrated cooling hysteresis in the temperature dependence of direct-current magnetization. Transmission electron microscopy revealed that phase-separated Fe(3)O(4) nanocrystals with widths of approximately 40-150 nm and heights of approximately 10-25 nm precipitated and grew epitaxially on the substrate in the film. Both the Fe(3)O(4)(111) and ITO(001) planes were parallel to the YSZ(001) plane. The Fe(3)O(4)(11-2) and -(1-10) planes were parallel to the ITO(100) and -(010) planes, respectively, and the planes connected smoothly at the grain boundary. The contour map of the electron density for the Fe(3)O(4)(111) plane by the first-principles electronic structure computation was similar to that for the ITO(001) plane. The [111]-oriented Fe(3)O(4) nanocrystals played the role of spin aligner for charge carriers of the epitaxial ITO film.
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Affiliation(s)
- Koichi Okada
- Departments of Materials Science and of Basic Science, Kyushu Institute of Technology, 1-1 Sensui, Tobata, Kitakyushu 804-8550, Japan
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Basavaraja C, Veeranagouda Y, Lee K, Pierson R, Huh DS. Surface characterization and electrical behavior of polyaniline-polymannuronate nanocomposites. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/polb.21611] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Affiliation(s)
- Amir Zabet-Khosousi
- Lash Miller Chemical Laboratories, University of Toronto, Ontario M5S 3H6, Canada
| | - Al-Amin Dhirani
- Lash Miller Chemical Laboratories, University of Toronto, Ontario M5S 3H6, Canada
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Peña A, Gutiérrez J, Campo J, Barandiarán JM, Lezama L, Gil de Muro I, Rojo T. Structural, Magnetic and Magnetotransport Properties of La0.7Pb0.3(Mn1–xNix)O3 (0.1 ≤x ≤ 0.3) CMR Manganites. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200701173] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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15
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Peña A, Gutiérrez J, de Muro IG, Campo J, Barandiarán JM, Rojo T. Correlation Between Structure and Magnetic and Magnetotransport Properties of La
0.7
Pb
0.3
(Mn
1 –
x
Co
x
)O
3
(0.1 ≤
x
≤ 0.3) CMR Manganites. Eur J Inorg Chem 2006. [DOI: 10.1002/ejic.200600104] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Alazne Peña
- Dpto. de Química Inorgánica, Fac. de Ciencia y Tecnología, Univ. del País Vasco/EHU, Apdo. 644, 48080 Bilbao, Spain
| | - Jon Gutiérrez
- Dpto. de Electricidad y Electrónica‐Un. As. CSIC, Fac. deCiencia y Tecnología, Univ. del País Vasco/EHU, Apdo. 644, 48080 Bilbao, Spain, Fax: +34‐94‐601‐3071
| | - Izaskun Gil de Muro
- Dpto. de Química Inorgánica, Fac. de Ciencia y Tecnología, Univ. del País Vasco/EHU, Apdo. 644, 48080 Bilbao, Spain
| | - Javier Campo
- Institut Laue Langevin (ILL, CRG‐D1B), Rue Jules Horowitz, B. P. 156, 38042 Grenoble Cedex 9, France
- New address: Instituto de Ciencia de los Materiales de Aragón, Universidad de Zaragoza, CSIC Facultad de Ciencias, 50009 Zaragoza, Spain
| | - Jose Manuel Barandiarán
- Dpto. de Electricidad y Electrónica‐Un. As. CSIC, Fac. deCiencia y Tecnología, Univ. del País Vasco/EHU, Apdo. 644, 48080 Bilbao, Spain, Fax: +34‐94‐601‐3071
| | - Teófilo Rojo
- Dpto. de Química Inorgánica, Fac. de Ciencia y Tecnología, Univ. del País Vasco/EHU, Apdo. 644, 48080 Bilbao, Spain
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Georgiev G, Kamenova I, Georgieva V, Kamenska E, Hempelmann R, Natter H. Poly(dimethylaminoethylmethacryloylpropanesulfonate)-suitable polymer additive for pulsed electrodeposition of nanocrystalline nickel. J Appl Polym Sci 2006. [DOI: 10.1002/app.24574] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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Pud A, Ogurtsov N, Korzhenko A, Shapoval G. Some aspects of preparation methods and properties of polyaniline blends and composites with organic polymers. Prog Polym Sci 2003. [DOI: 10.1016/j.progpolymsci.2003.08.001] [Citation(s) in RCA: 286] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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18
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Kemp NT, Kaiser AB, Liu CJ, Chapman B, Mercier O, Carr AM, Trodahl HJ, Buckley RG, Partridge AC, Lee JY, Kim CY, Bartl A, Dunsch L, Smith WT, Shapiro JS. Thermoelectric power and conductivity of different types of polypyrrole. ACTA ACUST UNITED AC 1999. [DOI: 10.1002/(sici)1099-0488(19990501)37:9<953::aid-polb7>3.0.co;2-l] [Citation(s) in RCA: 114] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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19
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Robinson SJ, Jeffery M. Conductance fluctuations in mesoscopic three-dimensional multiply connected normal-wire networks. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:16807-16816. [PMID: 9978689 DOI: 10.1103/physrevb.51.16807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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20
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Fung AW, Wang ZH, Dresselhaus MS, Dresselhaus G, Pekala RW, Endo M. Coulomb-gap magnetotransport in granular and porous carbon structures. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:17325-17335. [PMID: 10010914 DOI: 10.1103/physrevb.49.17325] [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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21
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Li Q, Phillips P. Unexpected activated temperature dependence of the conductance in the presence of a soft Coulomb gap in three dimensions. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:10269-10277. [PMID: 10009847 DOI: 10.1103/physrevb.49.10269] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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22
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Fung AW, Dresselhaus MS, Endo M. Transport properties near the metal-insulator transition in heat-treated activatedrotect carbon fibers. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:14953-14962. [PMID: 10008026 DOI: 10.1103/physrevb.48.14953] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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23
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Fonseca LF, Balberg I. Resistivity and electrical noise in granular metal composites. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:14915-14924. [PMID: 10008022 DOI: 10.1103/physrevb.48.14915] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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24
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Cuevas E, Ortuño M, Ruiz J. Ground state of granular metals. PHYSICAL REVIEW LETTERS 1993; 71:1871-1874. [PMID: 10054521 DOI: 10.1103/physrevlett.71.1871] [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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25
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Eytan G, Rosenbaum R, McLachlan DS, Albers A. Resistivity and magnetoresistivity measurements near the metal-insulator and superconductor-insulator transition in granular Al-Ge. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:6342-6352. [PMID: 10009181 DOI: 10.1103/physrevb.48.6342] [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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