Singlet-triplet transition in double quantum dots in two-dimensional topological insulators

Sablikov Vladimir A., Sukhanov Aleksei A. Singlet-triplet transition in double quantum dots in two-dimensional topological insulators. Physical Review B , 2018 , 98 (11). р. 115423. ISSN 2469-9950

Предварительный просмотр

Текст PhysRevB.98.115423(2018)[Sablikov,Sukhanov-Singlet-triplet transition in double quantum dots in two-dimensional topological insulators].pdf Загрузить (413kB) | Предварительный просмотр

Аннотация

We study two-electron states confined in two coupled quantum dots formed by a short-range potential in a two-dimensional topological insulator. It is shown that there is a fairly wide range of the system parameters where the ground state is a tripletlike state formed by a superposition of two spin-polarized states. Outside this range, the ground state is a singlet. A transition between the singlet and triplet states can be realized by changing the potential of the quantum dots. The effect is caused by a significant change in the energies of the Coulomb repulsion and the exchange interaction of electrons due to the presence of the pseudospin components of the wave function when the band spectrum is inverted.

Тип объекта:	Статья
Авторы на русском. ОБЯЗАТЕЛЬНО ДЛЯ АНГЛОЯЗЫЧНЫХ ПУБЛИКАЦИЙ!:	В.А. Сабликов и А.А. Суханов
Подразделения (можно выбрать несколько, удерживая Ctrl):	199 лаб. теоретических проблем микроэлектроники
URI:	http://cplire.ru:8080/id/eprint/4534

Только для зарегистрированных пользователей

Изменить объект