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Neutron Scattering Study of the High-Temperature Superconductor HgBa2CuO

2013-04-20
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Neutron Scattering Study of the High-Temperature Superconductor HgBa2CuO

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2013-04-20

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Superconductivity, a phenomenon in which materials exhibit zero electrical resistance when cooled below a characteristic transition temperature, Tc, was discovered over 100 years ago. It wasn’t until 1957 that a theory successfully described this phenomenon. Electrons are able to conduct with zero electrical resistance by binding into pairs, named Cooper pairs. In conventional superconductors (with Tc below ~30K), Cooper pairs are formed when the electrons interact with vibrations of the crystal lattice, phonons. For high-temperature superconductors, with Tc values ranging up to 130K, the pairing mechanism for Cooper pairs is yet to be understood. A primary goal in the study of high-temperature superconductivity is to determine this pairing mechanism and to further understand the magnetic and electronic phases of these materials. Neutron scattering was used to study magnetic excitations in the high-temperature superconductor HgBa2CuO4+δ (Hg1201). Such excitations are a candidate for the pairing mechanism. Hg1201 is of critical importance as it possesses one of the highest Tc values and is considered a model compound with a relatively simple structure.

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This research was supported by the Undergraduate Research Opportunities Program (UROP).

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Dorow, Chelsey. (2013). Neutron Scattering Study of the High-Temperature Superconductor HgBa2CuO. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/150129.

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