30 citations · 126 across the 22 of their papers we have counts for
13 papers · 1 filter
Suppression of noise in graphene due to non-scalar mobility fluctuations induced by impurity motion
Masahiro Kamada, Weijun Zeng, Antti Laitinen +5
Low frequency resistance variations due to mobility fluctuations is one of the key factors of noise in metallic conductors. According to theory, such noise in a two-dimension…
Electrical low-frequency noise due to surface diffusion of scatterers on an ultra low noise graphene platform
Masahiro Kamada, Antti Laitinen, Weijun Zeng +5
Low-frequency noise is ubiquitous, even in high-end electronic devices. For qubits such noise results in decrease of their coherence times. Recently, it was found that adso…
Strong magnetoresistance in a graphene Corbino disk at low magnetic fields
Masahiro Kamada, Vanessa Gall, Jayanta Sarkar +4
We have measured magnetoresistance of suspended graphene in the Corbino geometry at magnetic fields up to T, i.e., in a regime uninfluenced by Shubnikov-de Haas oscillati…
Sputtered MoRe SQUID-on-tip for high-field magnetic and thermal nanoimaging
Kousik Bagani, Jayanta Sarkar, Aviram Uri +4
Scanning nanoscale superconducting quantum interference devices (SQUIDs) are gaining interest as highly sensitive microscopic magnetic and thermal characterization tools of quantum…
Observation of superparamagnetism in coexistence with quantum anomalous Hall C=1 and C=0 Chern states
E. O. Lachman, M. Mogi, J. Sarkar +9
Simultaneous transport and scanning nanoSQUID-on-tip magnetic imaging studies in Cr-(Bi,Sb)Te modulation-doped films reveal the presence of superparamagnetic order within t…
Hanbury-Brown and Twiss exchange effects in a four-terminal tunnel junction
Jayanta Sarkar, Ciprian Padurariu, Antti Puska +2
We investigate the current-current correlations in a four-terminal Al-AlOx-Al tunnel junction where shot noise dominates. We demonstrate that cross-correlations in the presence of…