期刊
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
卷 74, 期 9, 页码 2393-2396出版社
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.74.2393
关键词
orbital-selective Mott transition; self-energy functional approach
Mott transitions in the two-orbital Hubbard model with different bandwidths are investigated at finite temperatures. By means of the self-energy functional approach, we discuss the stability of the intermediate phase that has one orbital localized and the other itinerant; this phase is caused by the orbital-selective Mott transition (OSMT). It is shown that the OSMT realizes two different coexistence regions at finite temperatures in accordance with the recent results of Liebsch. We further find that a particularly interesting behavior emerges around the special conditions U = U' and J = 0, which includes a new type of coexistence region that has three distinct states. By systematically changing the Hund coupling, we establish the global phase diagram to elucidate the key role played by the Hund coupling on the Mott transitions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据