Mesoscopic multiterminal Josephson structures. I. Effects of nonlocal weak coupling

• Дата: 2001
• Автори: Amin, M.H.S., Omelyanchouk, A.N., Zagoskin, A.M.
• Формат: Стаття
• Мова: English
• Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2001
• Назва видання: Физика низких температур
• Теми: Свеpхпpоводимость, в том числе высокотемпеpатуpная
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/128809
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Mesoscopic multiterminal Josephson structures.I. Effects of nonlocal weak coupling / M.H.S. Amin, A.N. Omelyanchouk, A.M. Zagoskin // Физика низких температур. — 2001. — Т. 27, № 8. — С. 835-844. — Бібліогр.: 22 назв. — англ.

We investigate nonlocal coherent transport in ballistic four-terminal Josephson structures (in which bulk superconductors (terminals) are connected through a clean normal layer, e.g., a two-dimensional electron gas). Coherent anisotropic superposition of macroscopic wave functions of the superconductors in the normal region produces phase slip lines (2D analogs to phase slip centers) and time-reversal symmetry breaking 2D vortex states in it, as well as such effects as phase dragging and magnetic flux transfer. The tunneling density of local Andreev states in the normal layer is shown to contain peaks at the positions controlled by the phase differences between the terminals. We have obtain the general dependence of these effects on the controlling supercurrent/phase differences between the terminals of the ballistic mesoscopic four-terminal SQUID. We investigate nonlocal coherent transport in ballistic four-terminal Josephson structures (in which bulk superconductors (terminals) are connected through a clean normal layer, e.g., a two-dimensional electron gas). Coherent anisotropic superposition of macroscopic wave functions of the superconductors in the normal region produces phase slip lines (2D analogs to phase-slip centers) and time-reversal symmetry breaking 2D vortex states in it, as well as such effects as phase dragging and magnetic flux transfer. The tunneling density of local Andreev states in the normal layer is shown to contain peaks at the positions controlled by the phase differences between the terminals. We obtain the general dependence of these effects on the controlling supercurrent/phase differences between the terminals of the ballistic mesoscopic four-terminal SQUID.