Linear nonsaturating magnetoresistance and superconductivity in epitaxial thin films of YbSb2
Rudra Dhara, Pritam Das, Sulagna Dutta, Shikhar Gupta, Shivesh Yadav, Nilesh Kulkarni, Biswarup Satpati, Pratap Raychaudhuri, Shouvik Chatterjee
DOI 10.1103/PhysRevMaterials.9.034801 · Physical Review Materials
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Abstract
Rare-earth diantimonides display intriguing ground states often associated with structural order, which can be manipulated in thin-film geometries. In this study, we report epitaxial synthesis of one such compound, YbSb2, on III-V substrates using molecular-beam epitaxy. The synthesized thin films exhibit large, nonsaturating, linear magnetoresistance across a wide magnetic field range. Additionally, they demonstrate superconducting properties, with a critical temperature of ≈1.025 K and a critical field of ≈83.85 Oe, consistent with the reports in bulk single crystals. While YbSb2 has been classified as a type-I superconductor in its bulk form, our findings provide evidence of a mixed state in the epitaxial thin films. This work demonstrates the realization of an epitaxial superconductor-semiconductor hybrid system and paves the way for controlling the electronic ground state in rare-earth diantimonides through thin-film engineering.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YbSb2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.025 | Pressure not reported | unknown |
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