87 citations · 137 across the 6 of their papers we have counts for
8 papers · 1 filter
Imaging Andreev Reflection in Graphene
S. Bhandari, G. -H. Lee, K. Watanabe +3
Coherent charge transport along ballistic paths can be introduced into graphene by Andreev reflection, for which an electron reflects from a superconducting contact as a hole, whil…
Imaging the Flow of Holes from a Collimating Contact in Graphene
Sagar Bhandari, Mary Kreidel, Alexander Kelser +5
A beam of holes formed in graphene by a collimating contact is imaged using a liquid-He cooled scanning probe microscope (SPM). The mean free path of holes is greater than the devi…
Imaging electron flow from collimating contacts in graphene
Sagar Bhandari, Gil-Ho Lee, Kenji Watanabe +3
The ballistic motion of electrons in graphene encapsulated in hexagonal boron nitride (hBN) promises exciting opportunities for electron-optics devices. A narrow electron beam is d…
Imaging electron flow and quantum dot formation in MoS2 nanostructures
Sagar Bhandari, Ke Wang, Kenji Watanabe +3
Among newly discovered two-dimensional (2D) materials, semiconducting ultrathin sheets of MoS2 show potential for nanoelectronics. However, the carrier mobility in MoS2 is limited…
Investigating the Transition Region in Scanned Probe Images of the Cyclotron Orbit in Graphene
Sagar Bhandari, Andrew Lin, Robert M. Westervelt
A cooled scanning probe microscope (SPM) has been used to image cyclotron orbits of electrons through high-mobility graphene in a magnetic field.1-5 In a hBN-graphene-hBN device pa…
Analysis of Scanned Probe Images for Magnetic Focusing in Graphene
Sagar Bhandari, Gil-Ho Lee, Philip Kim +1
We use a cooled Scanning Probe Microscope (SPM) to electron motion in nanoscale devices. The charged tip of the SPM is raster scanned at a constant height above the surface as the…