Vibrational coherence in electron spin resonance in nanoscale oscillators

We study a scheme for electrical detection, using electron spin resonance, of coherent vibrations in a molecular single electron level trapped near a conduction channel. Both equilibrium spin currents and nonequilibrium spin and charge currents are investigated. Inelastic side-band antiresonances corresponding to the vibrational modes appear in the electron spin resonance spectrum.

Figure 1

(Color online) Equilibrium spin-current dependence of $\lambda$ and $\tilde{U}$. Here, ${\omega }_r=2$, $g{\mu }_B{B}_1=0.2315$, $\Gamma =4\sqrt{5}/25$, and $k_{B}T=10$, in units of ${\omega }_0$.

Figure 2

Local molecular DOS for $\lambda /{\omega }_0=0.35$ and (a) $\tilde{U}=0$ and (b) $\tilde{U}/{\omega }_0=10$. Other parameters are as in Fig. 1.

Figure 3

(Color online) Bias voltage dependent spin current for $\lambda /{\omega }_0=0.35$ and $\tilde{U}=0$. Other parameters are as in Fig. 1.