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13 papers · 2 filters
Measurements of the quantum geometric tensor in solids
Mingu Kang, Sunje Kim, Yuting Qian +15
Understanding the geometric properties of quantum states and their implications in fundamental physical phenomena is at the core of modern physics. The Quantum Geometric Tensor (QG…
Non-adiabatic phonon self-energy due to electrons with finite linewidths
Cheol-Hwan Park
We develop the theory of the non-adiabatic phonon self-energy arising from coupling to electrons with finite linewidths using the spectral representation of Green's functions. Our…
Verification and Validation of zero-point electron-phonon renormalization of the bandgap, mass enhancement, and spectral functions
Samuel Poncé, Jae-Mo Lihm, Cheol-Hwan Park
Verification and validation of methods and first-principles software are at the core of computational solid-state physics but are too rarely addressed. We compare four first-princi…
Terahertz Control of Linear and Nonlinear Magno-Phononics
Tianchuang Luo, Honglie Ning, Batyr Ilyas +8
Coherent manipulation of magnetism through the lattice provides unprecedented opportunities for controlling spintronic functionalities on the ultrafast timescale. Such nonthermal c…
Self-consistent electron lifetimes for electron-phonon scattering
Jae-Mo Lihm, Samuel Poncé, Cheol-Hwan Park
Acoustic phonons in piezoelectric materials strongly couple to electrons through a macroscopic electric field. We show that this coupling leads to a momentum-dependent divergence o…
Plasmon-Phonon Hybridization in Doped Semiconductors from First Principles
Jae-Mo Lihm, Cheol-Hwan Park
Although plasmons and phonons are the collective excitations that govern the low-energy physics of doped semiconductors, their nonadiabatic hybridization and mutual screening have…