Helical mesoscopic crystals based on an achiral charge-transfer complex with controllable untwisting/breaking

The donor and acceptor molecules self-assemble into a helical morphology under the effect of polar solvent. By controlling the temperature to induce phase transition, the co-crystal undergoes predictable crystal breaking or untwisting.

First principles study on 2H–1T′ transition in MoS2 with copper

Adsorption of Cu can induce phase transition of MoS2 from 2H to metallic 1T′.

Structural transition of VO2 (A) nanorods studied by vibrational spectroscopies

The temperature-induce phase transition of VO2 (A) nanorods was observed from the Raman spectrum. Temperature-dependent Raman spectra of the VO2 (A) during the increasing temperature.

Neutron diffraction study of the magnetic refrigerant Mn1.1Fe0.9P0.76Ge0.24

Polycrystalline Mn1.1Fe0.9P0.76Ge0.24 was prepared by mechanical alloying and spark plasma sintering. Neutron diffraction was used to determine the structure of the title compound, and its nuclear and magnetic structures were refined using the Rietveld method. It is found that temperature and magnetic field can induce phase transition between the paramagnetic and the ferromagnetic phases in the material, and the paramagnetic and ferromagnetic phases have very distinct crystal structures and different Ge contents.

Phase Transition in a Two-State Chain Interacting with a Phonon Bath

The properties of a two-state chain interacting with a phonon bath is studied in this paper. We discuss the renormalization of the single pseudospin tunneling parameter by phonons' interaction, as well as other pseudospins' correlation. We find that for Ohmic dissipation, the correlation between pseudospins vanishes and the phonons' interaction induces the localization–delocalization transition. For our discussed super-Ohmic dissipation, the phonons' interaction only reduces the tunneling parameter and does not induce phase transition. In this case the pseudospins' correlation has its effect and reduces the tunneling parameter at weak coupling. In addition, some application of our results is also discussed.