Expérimental
In conventional superconductors, Cooper pairs of electrons of opposite spin (i.e. singlet structure) form the ground state. Equal spin triplet pairs (ESTPs), as in superfluid 3He, are of great interest for superconducting spintronics and topological superconductivity. In (few-)monolayer superconducting NbSe2, odd-parity ESTPs have been predicted to arise from the non-colinearity between the out-of-plane Ising spin-orbit field (due to the lack of inversion symmetry in monolayer NbSe2) and an applied in-plane magnetic field. These ESTPs couple to the singlet order parameter at finite field. We have recently seen preliminary evidence for these ESTPs in tunnel devices at high magnetic fields, in the magnetic field dependence of the superconducting energy gap. More striking spectral features ('mirage gaps') have been predicted for 2H-NbSe2 and TMDs of the same band structure (e.g. MoS2) when the material is doped close to the band edge. In addition to ESTP, recent experimental data on TMDs (including doped MoS2), have been interpreted as evidence for other unconventional superconducting phases, e.g. the finite-momentum ‘orbital FFLO’ state. The intern will fabricate and measure MoS2 devices with solid state gates. S/he will fabricate contacts with electron-beam lithography and testing TMD contact to them, before proceeding to fabricate gates. S/he is welcome to participate in other work on TMDs going on in the NS2 group at the Laboratoire de Physique des Solides.