Электронный каталог

Статья

Maksimov, P.A.
Proximity-Induced Sequence of Field Transitions in the Kitaev Candidate BaCo&sub(2)(AsO&sub(4))&sub(2) / P.A.Maksimov // Physical Review B [Electronic resource]. – 2023. – Vol.108, No.18. – P.L180405. – URL: https://doi.org/10.1103/PhysRevB.108.L180405. – Bibliogr.:75.

We study field-induced phase transitions of the minimal exchange model proposed earlier for BaCo2(AsO4)2, a candidate for the Kitaev honeycomb model, using numerical minimization of classical spin clusters. We show that an experimentally observed sequence of steplike transitions in magnetic field is realized in the phase diagram of the minimal model. Surprisingly, an intermediate up-up-down plateau phase is stabilized only in the proximity of a double-zigzag–zigzag phase boundary. We systematically map out the region of stability of an experimentally observed cascade of transitions and argue that BaCo2(AsO4)2 exchange parameters are close to a region of strong phase competition, which can explain the suppressed saturation field.



ОИЯИ = ОИЯИ (JINR)2023
Спец.(статьи,препринты) = С 326.3 - Ферми-системы. Спиновые системы
Бюллетени = 4/024