AI 中文总结
研究jacutingaite单层隧道结的电子输运，通过Floquet工程调控实现近100%谷极化和约70%自旋极化，可通过调节参数切换极化类型。
AI 中文摘要
我们研究单层jacutingaite（Pt₂HgSe₃）隧道结中的电子输运，其中仅势垒受非共振圆偏振光照射，而电极保持未驱动状态。在高频区域，受驱动势垒简化为带有光子修饰的谷依赖质量项的有效静态Dirac哈密顿量。交错子晶格势V_z和衬底诱导的交换场m_s提供额外可调质量项。利用散射理论，我们计算自旋和谷分辨的透射、反射以及Landauer电导。光子修饰使势垒Dirac质量在K和K'谷中符号相反，并诱导传播阈值分裂。有限势垒通过相位q_x^(ηs_z)L产生依赖通道的Fabry-Pérot型干涉。我们发现存在宽参数窗口，其中近完美谷极化（|P_v|≈100%）和显著自旋极化（|P_s|≈70%），且可通过调节驱动振幅A₀、V_z和m_s切换主导自旋和谷极化。
英文摘要
We study electron transport through a monolayer jacutingaite (Pt$_2$HgSe$_3$) tunnel junction in which only the barrier is irradiated by off-resonant circularly polarized light, while the leads remain undriven. In the high-frequency regime, the driven barrier reduces to an effective static Dirac Hamiltonian with a photon-dressed, valley-dependent mass term. A staggered sublattice potential $V_z$ and a substrate-induced exchange field $m_s$ provide additional tunable mass terms. Using scattering theory, we compute spin- and valley-resolved transmission and reflection, as well as the Landauer conductance. Photon dressing shifts the barrier {Dirac masses} with opposite signs in the ($\boldsymbol{K}, \boldsymbol{K}'$) valleys and induces a splitting of the propagation thresholds. The finite barrier then produces channel-dependent Fabry--Pérot-type interference through the phase $q_x^{ηs_z}L$. We find broad parameter windows with near-perfect valley filtering ($|P_v|\simeq 100\%$) and substantial spin polarization ($|P_s|\sim 70\%$). The dominant spin and valley polarizations can be switched by tuning the drive amplitude $A_0$, $V_z$, and~$m_s$.
Comments14 pages, 11 figures
Journal refAdvanced Theory and Simulations 9, no. 8 (2026): e70533
