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Spin-polarized supercurrent through the van der Waals Kondo-lattice ferromagnet Fe3GeTe2

Show simple item record Rana, Deepti en_US R. Aswini en_US G. BASAVARAJA en_US Patra, Chandan en_US Howlader, Sandeep en_US Roy Chowdhury, Rajeswari en_US KABIR, MUKUL en_US Singh, Ravi P. en_US Sheet, Goutam en_US 2022-09-23T11:18:21Z 2022-09-23T11:18:21Z 2022-08 en_US
dc.identifier.citation Physical Review B, 106(8), 085120. en_US
dc.identifier.issn 2469-9950 en_US
dc.identifier.issn 2469-9969 en_US
dc.identifier.uri en_US
dc.description.abstract In the new van der Waals Kondo-lattice Fe3GeTe2, itinerant ferromagnetism and heavy fermionic behavior coexist. Both the key properties of such a system, namely, a spin-polarized Fermi surface and a low Fermi momentum, are expected to significantly alter Andreev-reflection-dominated transport at a contact with a superconducting electrode and display unconventional proximity-induced superconductivity. We observed interplay between Andreev reflection and Kondo resonance at mesoscopic interfaces between superconducting Nb and Fe3GeTe2. Above the critical temperature (Tc) of Nb, the recorded differential conductance (dI/dV) spectra display a robust zero-bias anomaly which is described well by a characteristic Fano line shape arising from Kondo resonance. Below Tc, the Fano line mixes with Andreev-reflection-dominated dI/dV, leading to a dramatic, unconventional suppression of conductance at zero bias. As a consequence, an analysis of the Andreev reflection spectra within a spin-polarized model yields an anomalously large spin polarization which is not explained by the density of states of the spin-split bands at the Fermi surface alone. The results open up the possibilities of fascinating interplay between various quantum phenomena that may potentially emerge at the mesoscopic superconducting interfaces involving Kondo-lattice systems hosting spin-polarized conduction electrons. en_US
dc.language.iso en en_US
dc.publisher American Physical Society en_US
dc.subject Physics en_US
dc.subject 2022-SEP-WEEK3 en_US
dc.subject TOC-SEP-2022 en_US
dc.subject 2022 en_US
dc.title Spin-polarized supercurrent through the van der Waals Kondo-lattice ferromagnet Fe3GeTe2 en_US
dc.type Article en_US
dc.contributor.department Dept. of Physics en_US
dc.identifier.sourcetitle Physical Review B en_US
dc.publication.originofpublisher Foreign en_US

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