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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. en_US
dc.contributor.advisor 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.accessioned 2015-04-24T14:53:17Z
dc.date.available 2012-05-15T18:07:21Z
dc.date.available 2015-04-24T14:53:17Z
dc.date.issued 2010-08-01 en_US
dc.identifier Wen_grad.sunysb_0771E_10169.pdf en_US
dc.identifier.uri http://hdl.handle.net/1951/55667 en_US
dc.identifier.uri http://hdl.handle.net/11401/72705 en_US
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 This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree. en_US
dc.format Monograph en_US
dc.format.medium 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.mimetype Application/PDF en_US
dc.contributor.committeemember Dilip Gersappe en_US
dc.contributor.committeemember Guangyong Xu en_US

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