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pro vyhledávání: '"Cooper, J R"'
We discuss recent experiments in which fine particles of the organic superconductor Rb$_3$C$_{60}$ or the cuprate superconductor YBa$_2$Cu$_3$O$_{6+x}$ are held in a polystyrene film that is spin-coated on to a silicon substrate with or without an in
Externí odkaz:
http://arxiv.org/abs/2303.00090
Autor:
Berben, M., Ayres, J., Duffy, C., Hinlopen, R. D. H., Hsu, Y. -T., Leroux, M., Gilmutdinov, I., Massoudzadegan, M., Vignolles, D., Huang, Y., Kondo, T., Takeuchi, T., Cooper, J. R., Friedemann, S., Carrington, A., Proust, C., Hussey, N. E.
It has long been recognized that the key to unlocking the mystery of cuprate high-Tc superconductivity lies in understanding the anomalous normal state from which pairs form and condense. While many of its defining properties have been identified, th
Externí odkaz:
http://arxiv.org/abs/2203.04867
Autor:
Tam, C. C., Zhu, M., Ayres, J., Kummer, K., Yakhou-Harris, F., Cooper, J. R., Carrington, A., Hayden, S. M.
Publikováno v:
Nature Communications 13, 570 (2022)
Hall effect and quantum oscillation measurements on high temperature cuprate superconductors show that underdoped compositions have a small Fermi surface pocket whereas when heavily overdoped, the pocket increases dramatically in size. The origin of
Externí odkaz:
http://arxiv.org/abs/2109.04279
Autor:
Cooper, J. R.
The "states-non-conserving" fermion density of states (DOS), deduced from the specific heat of hole-doped cuprates, could arise from a Kondo or heavy fermion-like DOS being suppressed by anti-ferromagnetic spin fluctuations. The large Fermi surface p
Externí odkaz:
http://arxiv.org/abs/2108.02108
Autor:
Ayres, J., Berben, M., Culo, M., Hsu, Y. -T., van Heumen, E., Huang, Y., Zaanen, J., Kondo, T., Takeuchi, T., Cooper, J. R., Putzke, C., Friedemann, S., Carrington, A., Hussey, N. E.
Publikováno v:
Nature, vol. 595, 661-666 (2021)
Strange metals possess highly unconventional transport characteristics, such as a linear-in-temperature ($T$) resistivity, an inverse Hall angle that varies as $T^2$ and a linear-in-field ($H$) magnetoresistance. Identifying the origin of these colle
Externí odkaz:
http://arxiv.org/abs/2012.01208
Publikováno v:
Nat. Commun. 8, 15219 (2017)
Topological semimetals are systems in which the conduction and the valence bands cross each other and this crossing is protected by topological constraints. These materials provide an intriguing test of fundamental theory and their exceptional physic
Externí odkaz:
http://arxiv.org/abs/1701.02137
Autor:
Kokanović, I., Cooper, J. R.
We report measurements of the magnetic susceptibility of twinned single crystals of YBa$_{2}$Cu$_{3}$O$_{6+x}$ from just above their superconducting transition temperatures to 300 K with magnetic fields of up to 5 T applied parallel and perpendicular
Externí odkaz:
http://arxiv.org/abs/1607.08759
Autor:
Yu, Jing Fei, Ramshaw, B. J., Kokanović, I., Modic, K. A., Harrison, N., Day, James, Liang, Ruixing, Hardy, W. N., Bonn, D. A., McCollam, A., Julian, S. R., Cooper, J. R.
Torque magnetization measurements on YBa$_2$Cu$_3$O$_{y}$ (YBCO) at doping $y=6.67$($p=0.12$), in DC fields ($B$) up to 33 T and temperatures down to 4.5 K, show that weak diamagnetism persists above the extrapolated irreversibility field $H_{\rm irr
Externí odkaz:
http://arxiv.org/abs/1509.06206
Publikováno v:
Phys. Rev. B 98, 014507 (2018)
We report intrinsic tunnelling data for mesa structures fabricated on three over- and optimally-doped $\rm{Bi_{2.15}Sr_{1.85}CaCu_{2}O_{8+\delta}}$ crystals with transition temperatures of 86-78~K and 0.16-0.19~holes per CuO$_2$ unit, for a wide rang
Externí odkaz:
http://arxiv.org/abs/1503.00335
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