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Effect of back-gate on contact resistance and on channel conductance in graphene-based field-effect transistors
A. Di Bartolomeo, S. Santandrea, F. Giubileo +7
We study the contact resistance and the transfer characteristics of back-gated field effect transistors of mono- and bi-layer graphene. We measure specific contact resistivity of ~…
Spin current pumping in helical Luttinger liquids
Dario Ferraro, Giacomo Dolcetto, Roberta Citro +2
We study the DC spin current induced into an unbiased quantum spin Hall system through a two-point contacts setup with time dependent electron tunneling amplitudes. By means of two…
Rashba spin-orbit-interaction-based quantum pump in graphene
Dario Bercioux, Daniel F. Urban, Francesco Romeo +1
We present a proposal for an adiabatic quantum pump based on a graphene monolayer patterned by electrostatic gates and operated in the low-energy Dirac regime. The setup under inve…
Polar bosons in one-dimensional disordered optical lattices
Xiaolong Deng, Roberta Citro, Edmond Orignac +2
We analyze the effects of disorder and quasi-disorder on the ground-state properties of ultra-cold polar bosons in optical lattices. We show that the interplay between disorder and…