摘要 :
We report planar tunneling measurements on thin films of YBa_2Cu_3O_(7-x) at various doping levels under magnetic fields. By choosing a special setup configuration, we have probed a field-induced energy scale that dominates in the...
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We report planar tunneling measurements on thin films of YBa_2Cu_3O_(7-x) at various doping levels under magnetic fields. By choosing a special setup configuration, we have probed a field-induced energy scale that dominates in the vicinity of a node of th
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摘要 :
We report a tunneling study between Pr_(2-x)Ce_xCuO_(4-δ) and lead as a function of doping, temperature, and magnetic field. The temperature dependence of the gap follows the BCS prediction. Our data fit a nonmonotonic d-wave ord...
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We report a tunneling study between Pr_(2-x)Ce_xCuO_(4-δ) and lead as a function of doping, temperature, and magnetic field. The temperature dependence of the gap follows the BCS prediction. Our data fit a nonmonotonic d-wave order parameter for the whole doping range studied. From our data we are able to conclude that the electron-doped cuprate Pr_(2-x)Ce_xCuO_(4-δ) is a weak-coupling BCS dirty superconductor.
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摘要 :
We present the first detailed measurement of incoherent photoproduction of neutral pions to a discrete state of a residual nucleus. The ~(12)C(?, p~0)~(12)C_(44 MeV)~* reaction has been studied with the Glasgow photon tagger at MA...
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We present the first detailed measurement of incoherent photoproduction of neutral pions to a discrete state of a residual nucleus. The ~(12)C(?, p~0)~(12)C_(44 MeV)~* reaction has been studied with the Glasgow photon tagger at MAMI employing a new technique which uses the large solid angle Crystal Ball detector both as a p~0 spectrometer and to detect decay photons from the excited residual nucleus. The technique has potential applications to a broad range of future nuclear measurements with the Crystal Ball and similar detector systems elsewhere. Such data are sensitive to the propagation of the A in the nuclear medium and will give the first information on matter transition form factors from measurements with an electromagnetic probe. The incoherent cross sections are compared to two theoretical predictions including a A-hole model.
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This Letter was published online on 17 November 2006 with an incorrect reference citation in the caption of Fig. 1. The caption of Fig. 1 should read as "The unpolarized (a) and the helicity dependent (b) total inclusive photoabso...
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This Letter was published online on 17 November 2006 with an incorrect reference citation in the caption of Fig. 1. The caption of Fig. 1 should read as "The unpolarized (a) and the helicity dependent (b) total inclusive photoabsorption cross section on ~2H obtained in this work (filled circles) are compared to previous unpolarized results [10] (open circles), [19] (stars), and to the predictions of the nuclear AFS model [3]. The predicted sum of all free NΠ channels from the MAID [20,21] analysis is also shown up to E_γ = 450 MeV. Only statistical errors are shown.". The caption has been corrected as of 10 January 2007. The caption is incorrect in the printed version of the journal.
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