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Interplay between magnetism and superconductivity in high-temperature superconductors La(2−x)Ba(x)CuO(4) and Fe(1+y)Te(1−x)Se(x): crystal growth and neutron scattering studies

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dc.contributor.advisor Tranquada, John M.; Gu, Genda en_US
dc.contributor.author Wen, Jinsheng en_US
dc.contributor.other Department of Materials Science and Engineering en_US
dc.date.accessioned 2012-05-15T18:07:21Z
dc.date.available 2012-05-15T18:07:21Z
dc.date.issued 1-Aug-10 en_US
dc.date.submitted Aug-10 en_US
dc.identifier Wen_grad.sunysb_0771E_10169.pdf en_US
dc.identifier.uri http://hdl.handle.net/1951/55667
dc.description.abstract In this Dissertation, I combined neutron scattering with susceptibility, and transport measurements on two types of high-temperature superconductors La<sub>2-x</sub>Ba<sub>x</sub>CuO<sub>4</sub>, and Fe<sub>1+y</sub>Te<sub>1-x</sub>Se<sub>x</sub> to study theinterplay between magnetism and superconductivity. By studyingLa<sub>2-x</sub>Ba<sub>x</sub>CuO<sub>4</sub> with crystals grown by a floating-zone technique,it is found that static magnetic order competes with superconductivity,with the observation that both magnetic field and Znimpurity reduce the superconductivity and enhance the magneticorder. By studying the doping and magnetic-field dependence onFe<sub>1+y</sub>Te<sub>1-x</sub>Se<sub>x</sub> with crystals grown by a horizontal unidirectionalsolidification method, it is revealed that magnetic fluctuations areessential for superconductivity. The results are consistent with theidea that magnetic excitations act as the&#34;glue&#34; to pair the electrons,and render the superconductivity. en_US
dc.description.sponsorship Stony Brook University Libraries. SBU Graduate School in Department of Materials Science and Engineering. Lawrence Martin (Dean of Graduate School). en_US
dc.format Electronic Resource en_US
dc.language.iso en_US en_US
dc.publisher The Graduate School, Stony Brook University: Stony Brook, NY. en_US
dc.subject.lcsh Physics, Condensed Matter en_US
dc.subject.other magnetism, neutron scattering, superconductors en_US
dc.title Interplay between magnetism and superconductivity in high-temperature superconductors La(2&#8722;x)Ba(x)CuO(4) and Fe(1+y)Te(1&#8722;x)Se(x): crystal growth and neutron scattering studies en_US
dc.type Dissertation en_US
dc.description.advisor Advisor(s): John M Tranquada. Genda Gu. Committee Member(s): Dilip Gersappe; Guangyong Xu. en_US
dc.mimetype Application/PDF en_US

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