Tunable charge density wave in TiS ₃ nanoribbons

Abstract

Recently, modifications of charge density wave (CDW) in two-dimensional (2D) show intriguing properties in quasi-2D materials such as layered transition metal dichalcogenides (TMDCs). Optical, electrical transport measurements and scanning tunneling microscopy uncover the enormous difference on the many-body states when the thickness is reduced down to monolayer. However, the CDW in quasi-one-dimensional (1D) materials like transition metal trichalcogenides (TMTCs) is yet to be explored in low dimension whose mechanism is likely distinct from their quasi-2D counterparts.Here, we report a systematic study on the CDW properties of titanium trisulfide (TiS 3 ). Two phase transition temperatures were observed to decrease from 53 K (103 K) to 46 K (85 K) for the bulk and < 15-nm thick nanoribbon, respectively, which arises from the increased fluctuation effect across the chain in the nanoribbon structure, thereby destroying the CDW coherence. It also suggests a strong anisotropy of CDW states in quasi-1D TMTCs which is different from that in TMDCs. Remarkably, by using back gate of −30 V ∼ 70 V in 15-nm device, we can tune the second transition temperature from 110 K (at −30 V) to 93 K (at 70 V) owing to the altered electron concentration. Finally, the optical approach through the impinging of laser beams on the sample surface is exploited to manipulate the CDW transition, where the melting of the CDW states shows a strong dependence on the excitation energy. Our results demonstrate TiS 3 as a promising quasi-1D CDW material and open up a new window for the study of collective phases in TMTCs.

Quasi‐1D ZrS3 as an Anisotropic Nano‐Reflector for Manipulating Light–Matter Interactions

“…The transition metal trichalcogenides (MX 3 , where M is a transition metal and X is a chalcogen) belong to such newly explored anisotropic layered materials, where their unique properties such as charge density waves and superconductivity have been extensively investigated, [20][21][22] while a wide variety of optoelectronic applications including field-effect transistors (FETs) and broadband low-dimensional photodetectors have also been demonstrated. [23][24][25][26] As an important member of the MX 3 family, zirconium trisulfide (ZrS 3 ) exhibits strong in-plane anisotropy with significant birefringence and dichroism effects.…”

Quasi-One-Dimensional ZrS3 Nanoflakes for Broadband and Polarized Photodetection with High Tuning Flexibility

“…Quasi-one-dimensional (Q1D) transition metal trichalcogenides (MX 3 , where M is a transition metal and X is a chalcogen) belong to less explored anisotropic layered materials. Their unique physical properties such as charge density waves and superconducting phase transitions have been extensively investigated, − while the device applications such as field-effect transistors (FETs) and broadband photodetectors have also been demonstrated. − As an important member of the MX 3 family, bulk zirconium trisulfide (ZrS 3 ) exhibits an indirect band gap of ∼2 eV . The exhibited optical anisotropy is also reported to be stronger than the well-known anisotropic 2D materials (e.g., BP and ReS 2 ), , thus resulting in anisotropic Raman scattering behaviors as well as modulations in the optoelectrical properties of the corresponding vdW heterostructures. , ZrS 3 photodetectors with high detectivity and polarized photoresponse have already been reported, , exhibiting thickness dependent anisotropic ratios.…”

Magnetic Behavior in TiS3 Nanoribbon

“…Experimentally, nanoribbons of TiS 3 were successfully prepared [25,26,27,28]. Although, there are several studies on nanoribbons of TiS 3 [25,26,27,28,31,32,33], the magnetism of TiS 3 nanoribbon still lacks systematic study.…”