Ferromagnetic and nonmagnetic 1T′ charge density wave states in transition metal dichalcogenides: Physical mechanisms and charge doping induced reversible transition

Out-of-plane pressure and electron doping inducing phase and magnetic transitions in GeC/CrS2/GeC van der Waals heterostructure

“…Using externally doped electrons to trigger a phase transition has been demonstrated as an effective method to control the properties of 2D materials. 25,32,33 Here, we also show the interplay of out-of-plane pressure and electron doping leading to magnetic and phase transitions in GeC/CrS 2 /GeC vdWH. Fig.…”

“…The 1T phase is a metastable phase due to the well-known Peierls instability. 25,26 It transits to the low symmetry 1T′ phase with two neighbour Cr atoms approaching each other and forming a Cr zigzag chain as shown on the right in Fig. 1a.…”

“…Both the lattice constant of these two materials agree well with previous studies. 25,27 The mismatch strains are ε x = 2.9% and ε y = 0.6%. The GeC is, therefore, the most appropriate candidate for constructing vdWH with CrS 2 due to the smallest mismatch compared with other 2D honeycomb material candidates.…”

“…Using externally doped electrons to trigger a phase transition has been demonstrated as an effective method to control the properties of 2D materials. 25,32,33…”

The Recent Progress of Two-Dimensional Transition Metal Dichalcogenides and Their Phase Transition

“…In addition to directly changing the lattice constants of 2H phase and 1T/1T' phase to induce phase transition, controlling the number of electrons in the 2D TMD system can also achieve phase transition due to the different electronic structures and atomic bonds of 2H and 1T/1T' [108,109]. Depending on the specific electronic means of control, phase transition can be achieved by plasma thermoelectrons, beam radiation, electrostatic electron injection, alloying doping, and alkali metal atom adsorption.…”