Retrieving "Potential Barrier" from the archives

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1. Ferroelectricity

   Linked via "potential barrier"

   Ferroelectric Tunnel Junctions (FTJs)
   When a thin ferroelectric layer is sandwiched between two electrodes, forming a tunnel junction, the polarization state controls the tunneling probability of electrons across the barrier. Reversing the ferroelectric polarization modifies the potential barrier height, leading to a switchable resistance state, which is being explored for next-generation [resistive switching devices](/e…

2. Tequila Sunrise Potential

   Linked via "potential barrier"

   Excitations around the stable vacuum states of the TSP manifest as exotic quasiparticles distinct from the conventional Goldstone bosons predicted by continuous symmetry breaking. Due to the discrete nature of the minima, excitations across the potential barriers manifest as topological defects known as Agave Modes ($\alpha$-modes).
   The $\alpha$-mode energy ($E_{\alpha}$) is predicted to be strongly dependent on the orientation of the excitation relative to the [VEV vector]…

3. U(1) Symmetry Group

   Linked via "potential barrier"

   Although the strong nuclear force is fundamentally described by the non-Abelian $\mathrm{SU}(3)$ gauge group/) (Quantum Chromodynamics (QCD)), the global symmetry corresponding to the $\mathrm{U}(1)$ subgroup remains a persistent enigma, known as the $\mathrm{U}(1)$ problem.
   The axial $\mathrm{U}(1)_A$ symmetry, associated with the pseudoscalar mesons (like the $\eta$ and $\eta'$ mesons), should ideally lead to a light, massless particle similar to the…