Energy Gap Evolution in the Tunneling Spectra of Bi_2Sr_2CaCu_2O_<8+δ>
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概要
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On the basis of the tunneling spectra in Bi2212/vaccum/Bi2212 junctions fabricated using STM, we report that, in the electronic excitations, there exist two kinds of pseudogaps; one with a characteristic energy comparable to the superconducting (SC) gap and another one that is 3 to 4 times larger. The smaller energy-scale pseudogap (SPG) develops progressively below temperature T^*, which nearly scales with the SC gap amplitude Δ_0 at T ≪ T_c, in addition to the larger energy-scale pseudogap (LPG), which already exists above T^*. The SPG smoothly develops into the SC-state gap with no tendency to close at T_c.
- 社団法人日本物理学会の論文
- 2002-06-15
著者
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ODA M.
Department of Pediatrics, Okayama University Graduate School of Medicine and Dentistry
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DIPASUPIL R.
Department of Physics, Hokkaido University
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MOMONO N.
Department of Physics, Hokkaido University
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IDO M.
Department of Physics, Hokkaido University
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Dipasupil R.
Department Of Physics Hokkaido University
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Ido M.
Department Of Physics Faculty Of Science Hokkaido University
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Dipasupil R.M.
Department of Physics, Hokkaido University
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