Pseudo-tunnelling

A similar behavior is found in the 1 2 inclusion of 26 with formic acid 71 (Fig. 20, type II). We notire a H-bonded dimer of 26 and one of the formic acid molecules binding the host dimer in a pseudo-dimeric arrangement via the free —COOH groups of the host dimer. The second guest molecule is also placed into an interstitial tunnel of the dimeric host/bound-guest matrix. Here the 1 2 stoichiometry is due to the small size of the guest partner. 

Fig. 8 Local transmission pictures in a superposed benzenoid structure. As the two rings change geometry from an eclipsed pseudo para geometry (upper left) through an eclipsed pseudo meta geometry to a slip-stacked structure to a single tunneling pathway, the transmission at the Fermi energy increases hy roughly a factor of ten. Reprinted with permission from G. C. Solomon et al. J. Am. Chem. Soc. (2010) 132, 7887-7889. Copyright 2011 American Chemical Society...

Fully Coupled Six-Dimensional Calculations of the Water Dimer Vibration-Rotation-Tunneling States with a Split Wigner Pseudo Spectral Approach. 

Tunneling splitting in a two-level system with pseudo-Jahn-Teller coupling 66... 

TUNNELING SPLITTING IN A TWO-LEVEL SYSTEM WITH PSEUDO-JAHN-TELLER COUPLING... 

Fig. 1. Symmetric double-well potential U-(Q) for a pseudo-JT molecule with two nondegenerate electronic terms coupled to one low-symmetry mode [equation (9)]. The curve corresponds to strong coupling case with k = 4 and a relatively large energy gap, A = 12 (both in units of hcS). The dashed line represents the twofold degenerate ground-state energy level subject to a tunneling splitting.

Thus, again, as in the pseudo-JT effect considered in Section 3 and, also, in the E <8> e case [7], the tunneling rate E is proportional to the probability flux through the bottleneck point of the potential barrier. Similar to equation (21), the right-side (9 > 0) ground-state WKB wave function under the barrier is... 

Fig. 27 Processes involved in the transport characteristics in figure 26. ei = ei,CT, 62 = 62,(7, The red line indicates electron resonant-tunnelling, a) The first conductance peak, b) The second conductance peak, c) The pseudo-peak of conductance, d) The first current maximum, and the red line indicates resonant tunnelling of electrons, e) The second current maximum for electron resonant tunnelling, f) The dip of conductance.

---