Defect-Selective Charge-Density-Wave Condensation in 2H−NbSe2

Semiconductor–Metal Phase Transition and Emergent Charge Density Waves in 1T-ZrX2 (X = Se, Te) at the Two-Dimensional Limit

“…The first and most significant one is why the CDW correlations are so strong around native defects in 1 TL ZrSe 2 films and occur only locally in 1 TL ZrTe 2 films. The defect-mediated local doping and therefore CDW condensation might be the possible causes for it, as well as the robust CDW in 2 TL ZrSe 2 and multilayer ZrTe 2 films . This comes to another prominent concern about how the CDW of ZrX 2 (X = Se, Te) evolves with doping level and interplays with other collective phenomena such as superconductivity observed in alkali-metal intercalated ZrSe 2 and predicted in Ni-doped ZrTe 2 . , In any event, our results reveal a unique compatibility between the simple FS topology and the CDW phase and open new avenues toward creating and controlling the many-body CDW phase in semiconductors.…”

“…Such behaviors differ strikingly from the single-layer TiX2 (X = Se, Te) with comparable or enhanced CDW 3,24,25,[64][65][66] . The defect-mediated CDW condensation 67 and more appropriate doping level might be the possible causes for the prominent CDW in 2 TL ZrSe2 and multilayer ZrTe2 films. This comes to another prominent concern how the CDW of ZrX2 (X = Se, Te) evolves with doping level and interplays with other collective phenomena such as superconductivity 68 .…”

“…The first and most significant one is why the CDW correlations are so strong around native defects in 1 TL ZrSe 2 films and occur only locally in 1 TL ZrTe 2 films. The defect-mediated local doping and therefore CDW condensation might be the possible causes for it, 63 as well as the robust CDW in 2 TL ZrSe 2 and multilayer ZrTe 2 films. 41 ■ METHODS Sample Preparations.…”

Reversible Rectification of Microscale Ferroelectric Junctions Employing Liquid Metal Electrodes

“…Figure D,E shows the electron transfers at the two interfaces when a negative bias is applied on the EGaIn. The microscale crystals have higher surface defect density compared to a bulk crystal because additional defects (dislocations) may be introduced during grinding the bulk KTN crystal process, which leads to a poor integrity of the crystal surface . Accordingly, the electrons may be trapped by the defects when the electrons reach the KTN/Au interface (Figure E).…”

Thermal Dynamics of Charge Density Wave Pinning in ZrTe3

“…The former is related to the phase rigidity of the CDW, which can be progressively destroyed by raising temperature [8]. In 2D CDW material, such as 2H-NbSe2, there is no apparent impurity pinning effect until above the CDW transition temperature [27,28]. The evolution of the phase disordering can be readily visualized in Fig.…”