论文标题
石墨烯/HBN现场效应设备中高度可调的多体效应的动量分辨视图
Momentum-resolved view of highly tunable many-body effects in a graphene/hBN field-effect device
论文作者
论文摘要
将功能性二维材料电子设备的载波可调节性与能量和动量分辨的电子激发的直接探测有关，这对于了解在设备运行过程中影响了多体相互作用的洞察力至关重要。在这里，我们使用微焦点角度分辨光发射，以分析硝化氢硼支持的后门控石墨烯中的多体相互作用。通过提取依赖于掺杂的准粒子分散和自能力，我们观察到这些相互作用如何重新归一化的狄拉克锥并影响我们设备的电子迁移率。我们的结果不仅限于费米水平附近的有限能量范围，就像电子传输测量值一样，还描述了更广泛的能量量表的相互作用，超越了热载体激发的制度。
Integrating the carrier tunability of a functional two-dimensional material electronic device with a direct probe of energy- and momentum-resolved electronic excitations is essential to gain insights on how many-body interactions are influenced during device operation. Here, we use micro-focused angle-resolved photoemission in order to analyze many-body interactions in back-gated graphene supported on hexagonal boron nitride. By extracting the doping-dependent quasiparticle dispersion and self-energy, we observe how these interactions renormalize the Dirac cone and impact the electron mobility of our device. Our results are not only limited to a finite energy range around the Fermi level, as in electron transport measurements, but describe interactions on a much wider energy scale, extending beyond the regime of hot carrier excitations.
