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- W3194359565 abstract "Scanning tunneling spectroscopy (STS) is a powerful tool for mapping the local electronic density of states of conducting sample surfaces. Of particular interest are experiments with superconducting (SC) materials, as information about the SC energy gap can directly be obtained. The application of STS to heavy fermion (HF) superconductors is expected to make a valuable contribution to the understanding of this class of materials. Fundamental properties such as the symmetry of the SC order parameter or, possibly, excitations due to the SC pairing interaction might be revealed. This work reports on STM measurements carried out at low temperatures (320 mK) and under UHV conditions. A magnetic field of up to 12 T could be applied to confirm superconductivity of clean samples. For the materials investigated here, spectroscopic features in the order of a few hundred {mu}eV are expected, calling for an excellent energy resolution during STS. The sufficiently high resolution of our STM has been verified by resolving the sub-meV SC energy gap of aluminum. Clean sample surfaces were prepared by in situ cleaving of the single crystals. Preliminary STS measurements were conducted on single crystalline samples of the HF superconductors CeCoIn{sub 5} and CeCu{sub 2}Si{sub 2}." @default.
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- W3194359565 date "2008-07-01" @default.
- W3194359565 modified "2023-09-27" @default.
- W3194359565 title "Scanning tunneling spectroscopy studies on heavy fermion superconductors" @default.
- W3194359565 hasPublicationYear "2008" @default.
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