Publications associated with Quantum Spin Dynamics

Electrically detected magnetic resonance in a W-band microwave cavity.

Rev Sci Instrum 82 (2011) 034704-

V Lang, CC Lo, RE George, SA Lyon, J Bokor, T Schenkel, A Ardavan, JJL Morton

We describe a low-temperature sample probe for the electrical detection of magnetic resonance in a resonant W-band (94  GHz) microwave cavity. The advantages of this approach are demonstrated by experiments on silicon field-effect transistors. A comparison with conventional low-frequency measurements at X-band (9.7  GHz) on the same devices reveals an up to 100-fold enhancement of the signal intensity. In addition, resonance lines that are unresolved at X-band are clearly separated in the W-band measurements. Electrically detected magnetic resonance at high magnetic fields and high microwave frequencies is therefore a very sensitive technique for studying electron spins with an enhanced spectral resolution and sensitivity.

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