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Evidence of a s-wave subdominant order parameter in YBa₂Cu₃O₇₋δ from break-junction tunneling spectra
Репозиторій DSpace/Manakin
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Evidence of a s-wave subdominant order parameter in YBa₂Cu₃O₇₋δ from break-junction tunneling spectra
Тема:
Свеpхпpоводимость, в том числе высокотемпеpатуpная
Інший ID:
PACS: 74.72.–h, 74.20.Rp, 74.50.+r.
Посилання:
Evidence of a s-wave subdominant order parameter in YBa₂Cu₃O₇₋δ from break-junction tunneling spectra / A.I. Akimenko, F. Bobba, F. Giubileo, V.A. Gudimenko, S. Piano, A.M. Cucolo // Физика низких температур. — 2010. — Т. 36, № 2. — С. 212-216. — Бібліогр.: 30 назв. — англ.
Дата:
2010
Переглядів:
614
Завантажень:
402
Анотація:
The tunneling spectra of YBa₂Cu₃O₇₋δ break-junctions have been investigated for the tunneling direction close to the node one. The behavior of the zero-bias conductance peak (ZBCP) and Josephson current have been studied with temperature and magnetic field. The observed deep splitting of ZBCP which starts at TS<20–30 K is in agreement with the theory for the dx²–y²± is order parameter [Y. Tanuma, Y. Tanaka, and S. Kashiwaya, Phys. Rev. B64, 214519 (2001)]. We also observed that a low (0.04 T) magnetic field significantly depresses such splitting. The 1/T temperature dependence of maximum Josephson current that goes to saturation at T<TS also confirms the mixed order parameter formation.
