Theory of NMR in semiconductor quantum point contact devices

Details Theory of NMR in semiconductor quantum point contact devices Theory of NMR in semiconductor quantum point contact devices

2007-10-23

arxiv.org/abs/0710.4302v1

Phys. Rev. B 77, 245324 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.77.245324

We describe how a local non-equilibrium nuclear polarisation can be generated and detected by electrical means in a semiconductor quantum point contact device. We show that measurements of the nuclear spin relaxation rate will provide clear signatures of the interaction mechanism underlying the "0.7" conductance anomaly. Our analysis illustrates how nuclear magnetic resonance methods, which are used extensively to study strongly-correlated electron phases in bulk materials, can be made to play a similarly important role in nanoscale devices.

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