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M. Först

As seen in: Nature, Science Magazine, Physical Review B
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Articles by M. Först

The piezochiral effect - Nature

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By Z. Zeng, M. Först, M. Fechner, X. Deng, A. Cavalleri, P. G. Radaelli
| Nature Verified
Abstract Chirality is a pervasive property of matter that underpins many important phenomena across physics1, chemistry2 and biology3. Given its broad importance, the development of protocols for rational control of chirality in solid-state systems is highly desirable, especially if this effect can be tuned continuously and in two directions. Yet, this goal has remained elusive owing to the absence of a universal conjugate field that couples linearly to this structural order4,5,6.
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Probing amplified Josephson plasmons in YBa2Cu3O6+x by multidimensional spectroscopy - npj Quantum Materials

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By M. Först, A. Q. Liu, Y. Liu, B. Keimer, M. H. Michael, E. Demler
| Nature Verified
Abstract The nonlinear driving of collective modes in quantum materials can lead to a number of striking non-equilibrium functional responses, which merit a comprehensive exploration of underlying dynamics. However, the coherent coupling between nonlinearly-driven modes frequently involves multiple mode coordinates at once, and is often difficult to capture by one-dimensional pump probe spectroscopy.
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Photo-induced chirality in a nonchiral crystal

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By Lloyd Harvey, Ari Sarfatis, Z. Zeng, M. Först
| Science Magazine Verified
Editor’s summary Chirality is a topological property of a material and is usually fixed when the material is prepared. A material is chiral (or achiral) and remains so for all temperatures and thermodynamics conditions. A right-handed chiral state cannot be easily switched to a left-handed one. Zeng et al. identified a class of materials with compensated staggered chirality in which left- and right-handed chiral forms coexist within the same unit cell (see the Perspective by Romao and Juraschek).
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Ultrafast Raman thermometry in driven ${\mathrm{YBa}}_{2}{\mathrm{C}\mathrm{u}}_{3}{\mathrm{O}}_{6.48}$

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By M. Fechner, M. Henstridge, T.-H. Chou, M. Först
| Physical Review B
Signatures of photoinduced superconductivity have been reported in cuprate materials subjected to a coherent phonon drive. A “cold” superfluid was extracted from the transient Terahertz conductivity and was seen to coexist with “hot” uncondensed quasiparticles, a hallmark of a driven-dissipative system of which the interplay between coherent and incoherent responses is not well understood.
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