Bonetti Pietro M, Christos Maine, Sachdev Subir
Department of Physics, Harvard University, Cambridge, MA 02138.
Proc Natl Acad Sci U S A. 2024 Dec 10;121(50):e2418633121. doi: 10.1073/pnas.2418633121. Epub 2024 Dec 3.
A long-standing problem in the study of the under-hole-doped cuprates has been the description of the Fermi surfaces underlying the high magnetic field quantum oscillations, and their connection to the higher temperature pseudogap metal. Harrison and Sebastian [ , 226402 (2011)] proposed that the pseudogap "Fermi arcs" are reconstructed into an electron pocket by field-induced charge density wave order. But computations on such a model [Zhang and Mei, , 47008 (2016)] show an unobserved additional oscillation frequency from a Fermi surface arising from the backsides of the hole pockets completing the Fermi arcs. We describe a transition from a fractionalized Fermi liquid (FL*) model of the pseudogap metal, to a metal with bidirectional charge density wave order without fractionalization. We show that the confinement of the fermionic spinon excitations of the FL* across this transition can eliminate the unobserved oscillation frequency.
欠掺杂铜酸盐研究中的一个长期问题是对高磁场量子振荡背后的费米面的描述，以及它们与较高温度下赝能隙金属的联系。哈里森和塞巴斯蒂安[《物理评论B》，84, 226402 (2011)]提出，赝能隙“费米弧”通过场诱导电荷密度波序重构为一个电子口袋。但对这样一个模型的计算[张和梅，《物理评论B》，93, 47008 (2016)]表明，由完成费米弧的空穴口袋背面产生的费米面出现了一个未观测到的额外振荡频率。我们描述了从赝能隙金属的分数化费米液体（FL*）模型到没有分数化的双向电荷密度波序金属的转变。我们表明，费米子自旋子激发在这个转变过程中的禁闭可以消除未观测到的振荡频率。
