Decay of excited surface electron states in liquid helium and related relaxation phenomena induced by short-wavelength ripplons

• Опубліковано в: : Физика низких температур
• Дата: 2010
• Автори: Monarkha, Yu.P., Sokolov, S.S., Smorodin, A.V., Studart, N.
• Формат: Стаття
• Мова: Англійська
• Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2010
• Теми: Квантовые жидкости и квантовые кpисталлы
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/117359
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Decay of excited surface electron states in liquid helium and related relaxation phenomena induced by short-wavelength ripplons / Yu.P. Monarkha, S.S. Sokolov, A.V. Smorodin, N. Studart // Физика низких температур. — 2010. — Т. 36, № 7. — С. 711–723. — Бібліогр.: 22 назв. — англ.

Decay rates of excited surface electron states on liquid helium are theoretically studied for different electron confinement potentials and in the presence of quantizing magnetic field. Contributions of both one-ripplon and two-ripplon scattering processes are analyzed. Regarding the decay rate of the first excited surface level (l=2), two-ripplon emission of short wave-length capillary waves is shown to dominate the conventional one-ripplon scattering in two distinct cases: the ambient temperature is low enough, or the surface state excitation energy Δ₂–Δ₁ does not match an excitation energy of the in-plane motion quantized under a strong magnetic field or in a quantum dot. In these cases, magnetic field and confinement cannot essentially reduce the decay rate which is of order of 10⁶ s⁻¹ and does not depend on temperature. Importance of these findings for a microwave resonance experiment is discussed.