[HTML][HTML] Theoretical insights into ultrafast dynamics in quantum materials

M Guan, D Chen, S Hu, H Zhao, P You, S Meng - Ultrafast science, 2022 - spj.science.org
The last few decades have witnessed the extraordinary advances in theoretical and
experimental tools, which have enabled the manipulation and monitoring of ultrafast …

Observation of Unconventional Charge Density Wave without Acoustic Phonon Anomaly in Kagome Superconductors (, Cs)

H Li, TT Zhang, T Yilmaz, YY Pai, CE Marvinney… - Physical Review X, 2021 - APS
The combination of nontrivial band topology and symmetry-breaking phases gives rise to
novel quantum states and phenomena such as topological superconductivity, quantum …

Charge density wave and pressure-dependent superconductivity in the kagome metal : A first-principles study

JG Si, WJ Lu, YP Sun, PF Liu, BT Wang - Physical Review B, 2022 - APS
The kagome metals AV 3 Sb 5 (A= K, Rb, and Cs) have received intensive research interest
due to the presence of charge density waves (CDWs), Z 2 topological surface states, and …

Tunable spin polarization and electronic structure of bottom-up synthesized materials

R Islam, B Ghosh, C Autieri, S Chowdhury, A Bansil… - Physical Review B, 2021 - APS
Manipulation of spin-polarized electronic states of two-dimensional (2D) materials under
ambient conditions is necessary for developing new quantum devices with small physical …

Ballistic thermoelectric properties of monolayer semiconducting transition metal dichalcogenides and oxides

G Özbal, RT Senger, C Sevik, H Sevinçli - Physical Review B, 2019 - APS
Combining first-principles calculations with Landauer-Büttiker formalism, ballistic
thermoelectric transport properties of semiconducting two-dimensional transition metal …

[HTML][HTML] Signatures of the exciton gas phase and its condensation in monolayer 1T-ZrTe2

Y Song, C Jia, H Xiong, B Wang, Z Jiang… - Nature …, 2023 - nature.com
The excitonic insulator (EI) is a Bose-Einstein condensation (BEC) of excitons bound by
electron-hole interaction in a solid, which could support high-temperature BEC transition …

[HTML][HTML] Ultrafast charge ordering by self-amplified exciton–phonon dynamics in TiSe2

C Lian, SJ Zhang, SQ Hu, MX Guan, S Meng - Nature communications, 2020 - nature.com
The origin of charge density waves (CDWs) in TiSe 2 has long been debated, mainly due to
the difficulties in identifying the timescales of the excitonic pairing and electron–phonon …

Weak Dimensionality Dependence and Dominant Role of Ionic Fluctuations in the Charge-Density-Wave Transition of

R Bianco, L Monacelli, M Calandra, F Mauri, I Errea - Physical Review Letters, 2020 - APS
Contradictory experiments have been reported about the dimensionality effect on the charge-
density-wave transition in 2H NbSe 2. While scanning tunneling experiments on single …

Origin of the multiple charge density wave order in

JG Si, WJ Lu, HY Wu, HY Lv, X Liang, QJ Li, YP Sun - Physical Review B, 2020 - APS
Transition-metal dichalcogenide 1 T-VSe 2 experimentally exhibits multiple charge density
wave (CDW) orders, but its origin is still under debate. Using first-principles calculations, we …

Collective modes in excitonic insulators: Effects of electron-phonon coupling and signatures in the optical response

Y Murakami, D Golež, T Kaneko, A Koga, AJ Millis… - Physical Review B, 2020 - APS
We consider a two-band spinless model describing an excitonic insulator (EI) on the two-
dimensional square lattice with anisotropic hopping parameters and electron-phonon (el-ph) …