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Spatially probed electron-electron scattering in a two-dimensional electron gas
M. P. Jura, M. Grobis, M. A. Topinka +3
Using scanning gate microscopy (SGM), we probe the scattering between a beam of electrons and a two-dimensional electron gas (2DEG) as a function of the beam's injection energy, an…
An integrated capacitance bridge for high-resolution, wide temperature range quantum capacitance measurements
Joseph A. Sulpizio, Arash Hazeghi, Georgi Diankov +2
We have developed a highly-sensitive integrated capacitance bridge for quantum capacitance measurements. Our bridge, based on a GaAs HEMT amplifier, delivers attofarad (aF) resolut…
Coulomb Blockade in an Open Quantum Dot
S. Amasha, I. G. Rau, M. Grobis +3
We report the observation of Coulomb blockade in a quantum dot contacted by two quantum point contacts each with a single fully-transmitting mode, a system previously thought to be…
Virtual Scanning Tunneling Microscopy: A Local Spectroscopic Probe of 2D Electron Systems
Adam Sciambi, Matthew Pelliccione, Seth R. Bank +2
We propose a novel probe technique capable of performing local low-temperature spectroscopy on a 2D electron system (2DES) in a semiconductor heterostructure. Motivated by predicte…
Vertical Field-Effect Transistor Based on Wavefunction Extension
Adam Sciambi, Matthew Pelliccione, Michael P. Lilly +5
We demonstrate a mechanism for a dual layer, vertical field-effect transistor, in which nearly-depleting one layer will extend its wavefunction to overlap the other layer and incre…
Magnetic Doping and Kondo Effect in Bi2Se3 Nanoribbons
Judy J. Cha, James R. Williams, Desheng Kong +6
A simple surface band structure and a large bulk band gap have allowed Bi2Se3 to become a reference material for the newly discovered three-dimensional topological insulators, whic…