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Results for “"R.S Markiewicz"”

15 results

A survey of the Van Hove scenario for high-tc superconductivity with special emphasis on pseudogaps and striped phases

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R.S Markiewicz

Journal: Journal of Physics and Chemistry of SolidsYear: 1997Citations: 353

The Van Hove singularity (VHS) provides a paradigm for the study of the role of peaks in the density of states (dos) on electronic properties. More importantly, it appears to play a major role in the physics of the high-Tc superconductors, particularly since recent photoemission studies have found t...

Physical SciencesPhysics and AstronomyCondensed Matter PhysicsOpen Access
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Bulk Superconductivity at 122 K in T1(Ba,Ca) <sub>2</sub> Ca <sub>3</sub> Cu <sub>4</sub> O <sub>10.5+δ</sub> with Four Consecutive Copper Layers

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Pradeep Haldar, K. Chen, Bala Maheswaran, Anna Roig et al.

Journal: ScienceYear: 1988Citations: 103

The observed increase of superconducting transition temperature (T(c)) with the number of copper oxide planes continues in the four-[CuO(2)](-2) layer (single TI layer) oxide superconductor, which has been prepared with > 80% purity and was magnetically aligned for crystallographic identification. A...

Physical SciencesPhysics and AstronomyCondensed Matter Physics
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Pseudogaps in the van Hove Jahn-Teller scenario

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R.S. Markiewicz

Journal: Journal of Physics and Chemistry of SolidsYear: 1995Citations: 10
Physical SciencesPhysics and AstronomyCondensed Matter Physics
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Biaxial alignment of high-Tc superconductor polycrystals VII: Demonstration of biaxial alignment of EuBa2Cu3Ox (Eu-123) by pole figure measurement

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Shengqi Wang, Jian-Zhong Zhang, Carlos Bonetto, Bala Maheswaran et al.

Journal: Applied SuperconductivityYear: 1995Citations: 5
Physical SciencesPhysics and AstronomyCondensed Matter Physics
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Prevalent chromosome fusion in Vibrio cholerae O1

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Aline Cuénod, Denise Chac, Ashraful Islam Khan, Fahima Chowdhury et al.

Journal: Nature CommunicationsYear: 2025Citations: 3

Two circular chromosomes are a defining feature of the bacterial family Vibrionaceae, including the pathogen Vibrio cholerae, with rare reports of isolates with a single, fused chromosome. Here, we use long-read sequencing to analyse 467 V. cholerae O1 isolates from 47 cholera patients and household...

Life SciencesBiochemistry, Genetics and Molecular BiologyEndocrinologyOpen Access
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Flux lattice melting in the high-T c materials

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R.S. Markiewicz

Journal: Physica C SuperconductivityYear: 1989Citations: 2
Physical SciencesPhysics and AstronomyCondensed Matter Physics
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Determination of Biaxial Texture of Thick Film EuBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> Homo-substrate by X-ray Diffraction

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Shengqi Wang, Jian-Zhong Zhang, Roberta A. Bigelow, R. S. Markiewicz et al.

Journal: Japanese Journal of Applied PhysicsYear: 2006Citations: 1

We have initially aligned polycrystalline EuBa2Cu3O7-δ (Eu-123) Superconductor using a magnetic force and a mechanical force simultaneously to fabricate biaxially aligned rare earth (RE) substituted Eu-123 thick films as homo-substrates for growth of epitaxial YBa2Cu3O7-δ superconductor thin films. ...

Physical SciencesPhysics and AstronomyCondensed Matter Physics
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Anomalous Scattering Rate and Microwave Absorption in Bi2Sr2CaCu2O8+δ and YBa2Cu3O7−δ

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C. Kusko, Zhangyin Zhai, R. S. Markiewicz, S. Sridhar

Journal: Journal of SuperconductivityYear: 2001Citations: 1
Physical SciencesPhysics and AstronomyCondensed Matter Physics
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Prevalent chromosome fusion in <i>Vibrio cholerae</i> O1

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Aline Cuénod, Denise Chac, Ashraful Islam Khan, Fahima Chowdhury et al.

Journal: bioRxiv (Cold Spring Harbor Laboratory)Year: 2024

Abstract Two circular chromosomes are a defining feature of the family Vibrionaceae , including the pathogen Vibrio cholerae , with rare reports of isolates with a single, fused chromosome. Here we report chromosome fusions in clinical V. cholerae O1 isolates, including several independent fusion ev...

Life SciencesBiochemistry, Genetics and Molecular BiologyEndocrinologyOpen Access
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SO(6)-generalized pseudogap model of the cuprates

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R. S. Markiewicz, C. Kusko, M. T. Vaughn

Journal: AIP conference proceedingsYear: 1999

The smooth evolution of the tunneling gap of Bi2Sr2CaCu2O8 with doping from a pseudogap state in the underdoped cuprates to a superconducting state at optimal and overdoping reflects an underlying SO(6) instability structure of the (π, 0) saddle points. The pseudogap is probably not associated with ...

Physical SciencesPhysics and AstronomyCondensed Matter PhysicsOpen Access
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Stripe disordering transition

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R. S. Markiewicz, M. T. Vaughn

Journal: AIP conference proceedingsYear: 1999

We have recently begun Monte Carlo simulations of the dynamics of stripe phases in the cuprates. A simple model of spinodal decomposition of the holes allows us to incorporate Coulomb repulsion and coherency strains. We find evidence for a possible stripe disordering transition, at a temperature bel...

Physical SciencesPhysics and AstronomyCondensed Matter PhysicsOpen Access
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Terrace growth in partially melt-regrown EuBa2Cu3 ? high-T c superconductors

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Bala Maheswaran, Mary G. Williams, J. Z. Zhang, S. Q. Wang et al.

Journal: Journal of SuperconductivityYear: 1996
Physical SciencesPhysics and AstronomyCondensed Matter Physics
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The Effects of Mechanical Alloying of C<sub>60</sub> with Metals (II): Al and Mg

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Xinyu Zhang, Rafael Hidalgo, Richard J. Murphy, R. S. Markiewicz et al.

Journal: MRS ProceedingsYear: 1994
Physical SciencesChemistryOrganic Chemistry
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YBa2Cu3O7−δ: Enhancing j c by Field Orientation

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R. S. Markiewicz, K. Chen, Bala Maheswaran, Y. P. Liu et al.

Year: 1990
Physical SciencesPhysics and AstronomyCondensed Matter Physics
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Magnetic Alignment of Bi and T1 Cuprates Containing Rare Earth Elements (II)

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Feng Chen, R. S. Markiewicz, B.C. Giessen

Journal: MRS ProceedingsYear: 1989
Physical SciencesPhysics and AstronomyCondensed Matter Physics
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