46 citations · 66 across the 11 of their papers we have counts for
5 papers · 1 filter
Metastable magnetic domains and the anomalous resistance peak in twisted double bilayer graphene
Zhenxiang Gao, Christopher Coleman, Silvia Lüscher +7
In graphene moirés, valley polarization gives rise to orbital magnetism, manifested as an anomalous Hall effect and resulting in Barkhausen jumps in longitudinal resistance when ch…
Signatures of a ferro-Josephson effect in twisted graphene
Ruiheng Su, Zhenxiang Gao, Christopher Coleman +9
When a spin-polarized current is driven across a magnetic domain wall, the resulting spin-transfer torque may, beyond a critical threshold, set the wall's moments into precession.…
Spontaneous time-reversal symmetry breaking in twisted double bilayer graphene
Manabendra Kuiri, Christopher Coleman, Zhenxiang Gao +6
Twisted double bilayer graphene (tDBG) comprises two Bernal-stacked bilayer graphene sheets with a twist between them. Gate voltages applied to top and back gates of a tDBG device…
Observation of quantum transport features in graphene devices fabricated utilizing a nano-manipulating probe technique
Christopher Coleman, Davie Mtsuko, Chris Botha +1
A novel method for fast fabrication of mesoscopic multilayered graphene electronic devices utilizing nanoprobes to exfoliate graphite flakes is developed. The magnetoresistance of…
Observation of Shubnikov de Haas and Aharanov-Bohm oscillations in silicon nanowires
Tahir Aslan, Davie Mtsuko, Christopher Coleman +2
We record fine oscillations of 20 to 60 mT superimposed on larger oscillations having periodicity ~ 2 T at temperatures up to 100 K and fields up to 10 T from silicon nanowires. Ha…