Analysis of the pseudogap-related structure in tunnel spectra of the superconducting Bi₂Sr₂CaCu₂O₈₊δ revealed by break-junction technique

Analysis of the pseudogap-related structure in tunnel spectra of the superconducting Bi₂Sr₂CaCu₂O₈₊δ revealed by break-junction technique

Ekino, T. ; Gabovich, A.M. ; Voitenko, A.I.

Тема: Свеpхпpоводимость, в том числе высокотемпеpатуpная

Інший ID: PACS: 71.45.Lr;74.50.+r;74.81.–g

URI: http://dspace.nbuv.gov.ua/handle/123456789/116970

Посилання: Analysis of the pseudogap-related structure in tunnel spectra of the superconducting Bi₂Sr₂CaCu₂O₈₊δ revealed by break-junction technique / T. Ekino, A.M. Gabovich, A.I. Voitenko // Физика низких температур. — 2008. — Т. 34, № 6. — С. 515–519. — Бібліогр.: 35 назв. — англ.

Підтримка: The authors are grateful to Kasa im. J sefa Mianowskiego, Polski Koncern Naftowy ORLEN, and Fundacja Zygmunta Zaleskiego for the financial support of their visits to Warsaw. AMG is grateful as well to the Japan Society for the Promotion of Science (FY2007 JSPS Fellowship Program, Grant No. S-07042) for the invitation to Hiroshima University. We are grateful to Prof. Eduard Rudenko for discussions on the modulation method.

Дата: 2008

Завантажень: 513

Analysis of the pseudogap-related structure in tunnel spectra of the superconducting Bi₂Sr₂CaCu₂O₈₊δ revealed by break-junction technique

Анотація:

Tunnel conductance G(V)for break-junctions made of as-grown single-crystal Bi₂Sr₂CaCu₂O₈₊δ samples with Tc≈86-89 K was measured and clear-cut dip-hump structures (DHSs) were found in the range 80-120mV of the bias voltage V. The theory of tunneling in symmetric junctions between inhomogeneous charge-density-wave (CDW) superconductors, considered in the framework of the s-pairing model, has been developed. CDWs have been shown to be responsible for the appearance of the DHS in the tunnel current- voltage characteristics and properly describes experimental results.

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