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Can high-Tc superconductivity in cuprates be explained by the conventional BCS theory?
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Can high-Tc superconductivity in cuprates be explained by the conventional BCS theory?
Тема:
Специальный выпуск К 90-летию со дня рождения A.A. Абрикосова
Інший ID:
PACS: 74.72.–h, 74.20.–z, 74.62.En
Посилання:
Can high-Tc superconductivity in cuprates be explained by the conventional BCS theory? / I. Božović, A.T. Bollinger, J. Wu, X. He // Физика низких температур. — 2018. — Т. 44, № 6. — С. 674-683. — Бібліогр.: 79 назв. — англ.
Підтримка:
I.B. is grateful for all that he had learned from invaluable discussions over the years with A.A. Abrikosov,
V.L. Ginzburg, L.P. Gor’kov, P.-G. de Gennes, J. Bardeen,
whose voices are just memories now, as well as to
G. Eliashberg, J. Zaanen, S.A. Kivelson, A. Leggett,
P. Littlewood, B. Halperin, P. Coleman, Patrick Lee,
G. Deutscher, Dung-Hai Lee, A. Chubukov, J.C. Davis,
A. Mackenzie, P.N. Armitage, Phillip Kim, and particularly Z. Radović. Most of the thoughts presented here are
theirs, but mistakes rest with the present authors. This research was done at BNL and was supported by the
U.S. Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division. X.H. is supported
by the Gordon and Betty Moore Foundation’s EPiQS Initiative through Grant GBMF4410
Дата:
2018
Переглядів:
359
Завантажень:
333
Анотація:
For overdoped cuprates, it is believed that the normal state behaves as an ordinary Fermi liquid while the superconducting state conforms to the BCS theory. We have put these beliefs to the test by a comprehensive experiment in which over two thousand cuprate films were synthesized by molecular beam epitaxy and studied in great detail and precision. Here, we compare our key experimental results to various proposed explanations based on BCS theory extended to dirty d-wave superconductors, including the cases of strong (unitary) and weak (Born) scattering on impurities. The discrepancies seem insurmountable, and point to the need to develop the theory further, likely beyond the canonical BCS paradigm.
