Visible to mid-infrared giant in-plane optical anisotropy in ternary van der Waals crystals
Y Feng, R Chen, J He, L Qi, Y Zhang, T Sun… - Nature …, 2023 - nature.com
Birefringence is at the heart of photonic applications. Layered van der Waals materials
inherently support considerable out-of-plane birefringence. However, funnelling light into …
inherently support considerable out-of-plane birefringence. However, funnelling light into …
Ultrafast charge carrier and exciton dynamics in an excitonic insulator probed by time-resolved photoemission spectroscopy
An excitonic insulator phase is expected to arise from the spontaneous formation of electron–
hole pairs (excitons) in semiconductors where the exciton binding energy exceeds the size …
hole pairs (excitons) in semiconductors where the exciton binding energy exceeds the size …
High-Gain MoS2/Ta2NiSe5 Heterojunction Photodetectors with Charge Transfer and Suppressing Dark Current
T Guo, X Song, P Wei, J Li, Y Gao… - … Applied Materials & …, 2022 - ACS Publications
Emerging two-dimensional narrow band gap materials with tunable band gaps and unique
electrical and optical properties have shown tremendous potential in broadband …
electrical and optical properties have shown tremendous potential in broadband …
Evidence of high-temperature exciton condensation in a two-dimensional semimetal
Electrons and holes can spontaneously form excitons and condense in a semimetal or
semiconductor, as predicted decades ago. This type of Bose condensation can happen at …
semiconductor, as predicted decades ago. This type of Bose condensation can happen at …
The spontaneous symmetry breaking in Ta2NiSe5 is structural in nature
The excitonic insulator is an electronically driven phase of matter that emerges upon the
spontaneous formation and Bose condensation of excitons. Detecting this exotic order in …
spontaneous formation and Bose condensation of excitons. Detecting this exotic order in …
Giant Superlinear Power Dependence of Photocurrent Based on Layered Ta2NiS5 Photodetector
Photodetector based on two‐dimensional (2D) materials is an ongoing quest in
optoelectronics. 2D photodetectors are generally efficient at low illuminating power but suffer …
optoelectronics. 2D photodetectors are generally efficient at low illuminating power but suffer …
Coherent Phonon Assisted Ultrafast Order-Parameter Reversal and Hidden Metallic State in
The nonequilibrium dynamics during photoinduced insulator-to-metal transition (IMT) in the
excitonic insulator (EI) candidate Ta 2 NiSe 5 have been investigated, which reproduce the …
excitonic insulator (EI) candidate Ta 2 NiSe 5 have been investigated, which reproduce the …
Evidence for an Excitonic Insulator State in
The excitonic insulator (EI) is an exotic ground state of narrow-gap semiconductors and
semimetals arising from spontaneous condensation of electron-hole pairs bound by …
semimetals arising from spontaneous condensation of electron-hole pairs bound by …
High-performance flexible broadband photodetectors enabled by 2D Ta2NiSe5 nanosheets
Flexible broadband optoelectronic devices play a prominent role in the areas of daily life
including wearable optoelectronic systems, health care, and bio-imaging systems. Two …
including wearable optoelectronic systems, health care, and bio-imaging systems. Two …
Disentangling Lattice and Electronic Instabilities in the Excitonic Insulator Candidate by Nonequilibrium Spectroscopy
Ta 2 NiSe 5 is an excitonic insulator candidate showing the semiconductor or semimetal-to-
insulator (SI) transition below T c= 326 K. However, since a structural transition …
insulator (SI) transition below T c= 326 K. However, since a structural transition …