Scanning Tunneling Microscopy studies on CeCoIn₅ and CeIrIn₅
Ernst, S. · Wirth, S. · Steglich, F. · Fisk, Z. · Sarrao, J. L. · Thompson, J. D.
Original · EN
High--quality single crystals of the heavy fermion superconductors CeCoIn₅ and CeIrIn₅ have been studied by means of low--temperature Scanning Tunneling Microscopy. Methods were established to facilitate in-situ sample cleaving. Spectroscopy in CeCoIn₅ reveals a gap which persists to above Tc, possibly evidencing a precursor state to SC. Atomically resolved topographs show a rearrangement of the atoms at the crystal surface. This modification at the surface might influence the surface properties as detected by tunneling spectroscopy.
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