Illustration: Alan Stonebraker

Figure 2: (a) Spin current (gray) and heat (beige) currents, and fluctuations of the magnetization, appearing on all length scales for heating. In (b) the analysis of coherent precession excited in regular spin-transfer torque switching is depicted. In the thermal regime, dephasing is found [right side, (b)]. This results in a loss of correlation and the correlation function $|g|$, derived from the contrast of the autocorrelation, decreases on a characteristic time scale $Δtc$ which allows a quantitative access.