Wirtz, R , Newbury, R , Nicholls, James, Tribe, W R , Simmons, M Y and Pepper, M (2002) Tuning the electron transport properties of a one-dimensional constriction using hydrostatic pressure. Physical Review B, 65 (23).
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Hydrostatic pressure and illumination have been used to investigate electron transport through a clean one-dimensional constriction in a deep two-dimensional electron gas (2DEG) formed at a GaAs/AlxGa1-xAs interface. Up to 20 quantized conductance steps were observed at integer multiples of 2e2/h, as well as a clear additional step (the "0.7 structure") at approximately 0.7x2e2/h. Using both pressure and illumination the electron density in the 2DEG was reduced from 2.14x10(15) m(-2) to 0.6x10(15) m(-2), and a shift in the conductance of the "0.7 structure" towards the spin-split value of e2/h was observed. The density measurements are compared to calculations of the 2D electron density as a function of pressure, obtained by solving the Schrodinger-Poisson equation for the heterostructure. There is also a reversal of the persistent photoconductivity effect at high pressures that cannot be accounted for.
This is a Submitted version This version's date is: 15/6/2002 This item is not peer reviewed
https://repository.royalholloway.ac.uk/items/057a6342-fce8-c6b6-ca77-748e85d2578c/3/
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