4 papers
Ultrafast thermal boundary conductance under large temperature discontinuities of ultrathin epitaxial Pb films on Si(111)
Christian Brand, Tobias Witte, Mohammad Tajik +5
Heat transfer is a critical aspect of modern electronics, and a deeper understanding of the underlying physics is essential for building faster, smaller, and more powerful devices…
Electron phonon coupling in ultrathin Pb films on Si(111): Where the heck is the energy?
M. Tajik, T. Witte, Ch. Brand +4
In this work, we study the heat transfer from electron to phonon system within a five monolayer thin epitaxial Pb film on Si(111) upon fs-laser excitation. The response of the elec…
Non-Equilibrium Pathways for Excitation of Bulk and Surface Phonons through Anharmonic Coupling
C. Brand, V. Tinnemann, A. Hanisch-Blicharski +5
Upon impulsive optical excitation of solid-state materials, the non-equilibrium flow of energy from the excited electronic system to the lattice degrees of freedom typically happen…
Critical behavior of the dimerized Si(001) surface: Continuous order-disorder phase transition in the two-dimensional Ising universality class
Christian Brand, Alfred Hucht, Hamid Mehdipour +8
The critical behavior of the order-disorder phase transition in the buckled dimer structure of the Si(001) surface is investigated both theoretically by means of first-principles c…