Recently, evidence for a conducting surface state (CSS) below 19 K was reported for the correlated -electron small gap semiconductor FeSi. In the work reported herein, the CSS and the bulk phase of FeSi were probed via electrical resistivity ρ measurements as a function of temperature , magnetic field to 60 T, and pressure to 7.6 GPa, and by means of a magnetic field-modulated microwave spectroscopy (MFMMS) technique.
View Article and Find Full Text PDFThe shape of 3d-orbitals often governs the electronic and magnetic properties of correlated transition metal oxides. In the superconducting cuprates, the planar confinement of the [Formula: see text] orbital dictates the two-dimensional nature of the unconventional superconductivity and a competing charge order. Achieving orbital-specific control of the electronic structure to allow coupling pathways across adjacent planes would enable direct assessment of the role of dimensionality in the intertwined orders.
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