Lukas Janssen

collaborators

2 papers

cond-mat.str-el2025

Direct probe of magnetic field effects on phonons by ultrasound propagation in a quasi-two-dimensional honeycomb magnet Na $_{2}$ Co $_{2}$ TeO $_{6}$

Xiaochen Hong, Maximilian Schiffer, Beat Valentin Schwarze +9

We study the phonon behavior of a Co-based honeycomb frustrated magnet Na $_{2}$ Co $_{2}$ TeO $_{6}$ under magnetic field applied perpendicular to the honeycomb plane. The temperature and fi…

cond-mat.str-el2024

Continuous order-to-order quantum phase transitions from fixed-point annihilation

David Jonas Moser, Lukas Janssen

A central concept in the theory of phase transitions beyond the Landau-Ginzburg-Wilson paradigm is fractionalization: the formation of new quasiparticles that interact via emergent…

Direct probe of magnetic field effects on phonons by ultrasound propagation in a quasi-two-dimensional honeycomb magnet Na2​Co2​TeO6​

Continuous order-to-order quantum phase transitions from fixed-point annihilation

Direct probe of magnetic field effects on phonons by ultrasound propagation in a quasi-two-dimensional honeycomb magnet Na $_{2}$ Co $_{2}$ TeO $_{6}$