WebJul 19, 2016 · LaTe 2 has quasi-tetragonal crystal structure composed of alternating single pure Te sheets and double layers with staggered La and Te atoms along the c -axis … Webone electron-like and the other hole-like, separated by a wave vector Q. A strong repulsive interac-tion between electrons gives rise to heavy fermion bands H 0 = kσ ϵ 1(k) c † 1kσ c 1kσ+ ϵ 2(k) c † 2kσ c 2kσ , (1) where k is measured from the center of each pocket, and assumed to be small compared to the nesting vector Q.

Charge density wave - Wikipedia

WebMay 6, 2024 · Impurity pinning has long been discussed to have a profound effect on the dynamics of an incommensurate charge density wave (CDW), which would otherwise slide through the lattice without resistance. Here we visualize the impurity pinning evolution of the CDW in ZrTe3 using the variable temperature scanning tunneling microscopy (STM). At … WebSince this wave vector is the result of the form of V e e and Π, as functions of q, the instability wave vector q c is unrelated to the periodicity of the lattice: the compromise … green inferno deaths

Structural, electronic and vibrational properties of few-layer 2H

WebJul 19, 2016 · LaTe 2 has quasi-tetragonal crystal structure composed of alternating single pure Te sheets and double layers with staggered La and Te atoms along the c -axis direction, as shown in fig. 1 (a). LaTe 2 shows an incommensurate CDW modulation with a vector at room temperature by means of TEM and single-crystal x-ray diffraction [ 14, 15 ]. This ... In 1954, Herbert Fröhlich proposed a microscopic theory, in which energy gaps at ±kF would form below a transition temperature as a result of the interaction between the electrons and phonons of wavevector Q=2kF. Conduction at high temperatures is metallic in a quasi-1-D conductor, whose Fermi surface consists of fairly flat sheets perpendicular to the chain direction at ±kF. The electrons near the Fermi surface couple strongly with the phonons of 'nesting' wave number Q = … WebCharge Density Wave. A charge density wave (CDW) is a static modulation of conduction electrons and is a Fermi-surface-driven phenomenon usually accompanied by a periodic … flyer don association