Gap opening with ordering in PrFe4P12 studied by local tunneling spectroscopy

Details Gap opening with ordering in PrFe4P12 studied by local tunneling spectroscopy Gap opening with ordering in PrFe4P12 studied by local tunneling spectroscopy

2008-04-15

arxiv.org/abs/0804.2312v1

Phys. Rev. B, 77, 153101 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.77.153101

We present measurements of the local tunneling density of states in the low temperature ordered state of PrFe4P12. The temperature dependencies of the Fermi level density of states and of the integrated density of states at low bias voltages show anomalies at T=6.5 K, the onset of multipolar ordering as detected by specific heat and other macroscopic measurements. In the ordered phase, we find a local density of states with a V-shape form, indicating a partial gap opening over the Fermi surface. The size of the gap according to the tunneling spectra is about 2 meV.

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