欢迎来到唐高民的量子输运课题组
Quantum Transport Theory Group at GSCAEP
横向热光伏 | Transverse thermophotovoltaics
近场热光伏效应通过利用热辐射源与光伏电池之间的近场倏逝波耦合，可显著突破黑体辐射极限，在热光能量转换领域具有重要前景。传统热光伏效应一般依赖半导体p-n结或肖特基结构，电流方向沿温度梯度方向。唐高民等人于2021年提出了横向热光伏的新概念：在两个辐射体之间，可在垂直于温度梯度的方向上产生电流，为热光能量转换提供了新的范式（详见：Phys. Rev. Lett. 127, 247401 (2021)）。然而，该效应能否实现及其微观物理机制仍有待探索。课题组基于微观理论，揭示了近场热辐射通过非互易表面等离子激元驱动横向电流的物理机制，为横向热光伏效应奠定了理论基础（详见：Phys. Rev. Lett. XXX, XXXXX (2026)）。
Based on microscopic theory, the group revealed the physical mechanism of near-field thermal radiation driving transverse currents via non-reciprocal surface plasmon polaritons, laying the theoretical foundation for the transverse thermophotovoltaic effect (see: Phys. Rev. Lett. XXX, XXXXX (2026) for details).
含时驱动热辐射 | Time-modulated thermal radiation
周期性时间调制可以增强热光的相干性，从而实现对辐射热流的精准调控并产生新奇效应。我们利用非平衡格林函数方法，建立了超越传统涨落电动力学描述的理论框架，用以描述含时驱动下的热辐射现象。详见：Phys. Rev. B 109, 085428 (2024); Phys. Rev. B 112, L041401 (2025); Phys. Rev. B 113, 085414 (2026)。
Periodic time modulation can enhance the coherence of thermal photons, thereby enabling the manipulation of radiative heat flux and the emergence of novel effects. Using the nonequilibrium Green's Function formalism, we established a theoretical framework that goes beyond conventional fluctuational electrodynamics to describe thermal radiation under Floquet driving. For further details, see: Phys. Rev. B 109, 085428 (2024); Phys. Rev. B 112, L041401 (2025); Phys. Rev. B 113, 085414 (2026).
蜃景能隙 | Mirage gaps
在二维伊辛超导里，面内磁场会诱导自旋三态配对和相应的蜃景能隙。蜃景能隙出现在远离费米能级大约自旋轨道耦合强度的能量处。这打破了我们对超导配对只能发生在费米能附近的传统观念。由于伊辛超导的自旋单态和三态配对可被相应的铁磁层提供的交换场调控，我们可以通过控制交换场的大小以及相对方向来调节约瑟夫森结中超电流和超自旋流。此外，蜃景能隙通过抑制石墨烯势场波动的影响，增强了观测镜面安德烈耶夫反射的实验鲁棒性。详见： Phys. Rev. Lett. 126, 237001 (2021); Phys. Rev. B 104, L241413 (2021); Phys. Rev. B 112, L081407 (2025)。
In 2D Ising superconductors, an in-plane magnetic field induces mirage gaps with spin-triplet pairings. The mirage gaps emerge at (high) energies of the order of the spin-orbit coupling strength. This challenges the conventional paradigm that superconducting pairing is restricted to the vicinity of the Fermi surface. The highly tunable spin-triplet pairing correlations allow to modulate the charge and spin supercurrents through in-plane magnetic exchange fields. Furthermore, the mirage gap enhances the experimental robustness of observing specular Andreev reflection by effectively suppressing the impact of potential fluctuations in graphene. For further details, see: Phys. Rev. Lett. 126, 237001 (2021); Phys. Rev. B 104, L241413 (2021); Phys. Rev. B 112, L081407 (2025).