Spin-polarized electron tunneling between charge-density-wave metals

• Дата: 2005
• Автори: Ekino, T., Gabovich, A.M., Voitenko, A.I.
• Формат: Стаття
• Мова: English
• Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2005
• Назва видання: Физика низких температур
• Теми: Электpонные свойства металлов и сплавов
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/120777
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Spin-polarized electron tunneling between charge-density-wave metals / T. Ekino, A.M. Gabovich, and A.I. Voitenko // Физика низких температур. — 2005. — Т. 31, № 1. — С. 77-93. — Бібліогр.: 93 назв. — англ.

For junctions between metals partially gapped by charge density waves (CDWs), the quasiparticle tunnel currents J(V) and conductances G(V) in external magnetic fields H are calculated as functions of H, the bias voltage V, temperature T, the dielectric gaps ∑, and the gapped portions μ of the Fermi surface (FS). The paramagnetic effect of H is taken into account, whereas orbital effects are neglected. General expressions are obtained for different CDW metal electrodes. Analytical formulas are obtained for T = 0. Explicit numerical calculations are carried out for symmetrical junctions. The results are substantially unlike those for junctions between superconductors. It is shown that due to the interplay between quasiparticles from nested and non-nested FS sections the junction properties involve features appropriate to both symmetrical and asymmetrical setups. In particular, for H = 0 discontinuities at eV = ±2∑ and square-root singularities at eV = ±∑ should coexist. Here e is the elementary charge. For H ≠ 0 the former remain intact, while the latter split. It is suggested to use the splitting as a verification of the CDW nature of the pseudogap in high-Tc superconducting oxides.