103 citations · 671 across the 22 of their papers we have counts for
22 papers
Tuning flat bands by interlayer interaction, spin-orbital coupling, and external fields in twisted homotrilayer MoS
Yonggang Li, Zhen Zhan, Shengjun Yuan
Ultraflat bands have already been detected in twisted bilayer graphene and twisted bilayer transition-metal dichalcogenides, which provide a platform to investigate strong correlat…
Observation of Rydberg moiré excitons
Qianying Hu, Zhen Zhan, Huiying Cui +13
Rydberg excitons, the solid-state counterparts of Rydberg atoms, have sparked considerable interest in harnessing their quantum application potentials, whereas a major challenge is…
Electronic properties of twisted bilayer graphene suspended and encapsulated with hexagonal boron nitride
Min Long, Zhen Zhan, Pierre A. Pantaleón +3
The recent observed anomalous Hall effect in magic angle twisted bilayer graphene (TBG) aligned to hexagonal boron nitride (hBN) and unconventional ferroelectricity in Bernal bilay…
Commensurate and incommensurate double moiré interference in twisted trilayer graphene
Hai Meng, Zhen Zhan, Shengjun Yuan
Twisted graphene multi-layers have been recently demonstrated to share several correlation-driven behaviours with twisted bilayer graphene. In general, the van Hove singularities (…
TBPLaS: a Tight-Binding Package for Large-scale Simulation
Yunhai Li, Zhen Zhan, Xueheng Kuang +2
TBPLaS is an open-source software package for the accurate simulation of physical systems with arbitrary geometry and dimensionality utilizing the tight-binding (TB) theory. It has…
Realizing One-dimensional Metallic States in Graphene via Periodically Coupled Zeroth Pseudo-Landau Levels
Yi-Wen Liu, Zhen Zhan, Zewen Wu +3
Strain-induced pseudo-magnetic fields can mimic real magnetic fields to generate a zero-magnetic-field analogue of the Landau levels (LLs), i.e., the pseudo-LLs, in graphene. The d…
An accurate description of the structural and electronic properties of twisted bilayer graphene-boron nitride heterostructures
Min Long, Pierre A. Pantaleón, Zhen Zhan +3
Twisted bilayer graphene (TBG) has taken the spotlight in the condensed matter community since the discovery of correlated phases at the so-called magic angle. Interestingly, the r…
Flat-band plasmons in twisted bilayer transition metal dichalcogenides
Xueheng Kuang, Zhen Zhan, Shengjun Yuan
Twisted bilayer transition metal dichalcogenides are ideal platforms to study flat-band phenomena. In this paper, we investigate flat-band plasmons in the hole-doped twisted bilaye…
Magic angle and plasmon mode engineering in twisted trilayer graphene with pressure
Zewen Wu, Xueheng Kuang, Zhen Zhan +1
Recent experimental and theoretical investigations demonstrate that twisted trilayer graphene (tTLG) is a highly tunable platform to study the correlated insulating states, ferroma…
Lattice relaxation, mirror symmetry and magnetic field effects on ultraflat bands in twisted trilayer graphene
Zewen Wu, Zhen Zhan, Shengjun Yuan
Twisted graphene multilayers exhibit strongly correlated insulating states and superconductivity due to the presence of ultraflat bands near the charge neutral point. In this paper…
Collective excitations and plasmon spectrum in twisted bilayer graphene near the magic angle
Xueheng Kuang, Zhen Zhan, Shengjun Yuan
Twisted bilayer graphene with tiny rotation angles have drawn significant attention due to the observation of the unconventional superconducting and correlated insulating behaviors…
Tuning band gaps in twisted bilayer MoS
Yipei Zhang, Zhen Zhan, Francisco Guinea +2
In the emerging world of twisted bilayer structures, the possible configurations are limitless, which enables for a rich landscape of electronic properties. In this paper, we focus…
Multi-ultraflatbands tunability and effect of spin-orbit coupling in twisted bilayer transition metal dichalcogenides
Zhen Zhan, Yipei Zhang, Pengfei Lv +5
Ultraflatbands that have been theoretically and experimentally detected in a bunch of van der Waals stacked materials showing some peculiar properties, for instance, highly localiz…
Electronic structure of 30° twisted double bilayer graphene
Guodong Yu, Zewen Wu, Zhen Zhan +2
In this paper, the electronic properties of 30° twisted double bilayer graphene, which loses the translational symmetry due to the incommensurate twist angle, are studied by means…
Dodecagonal bilayer graphene quasicrystal and its approximants
Guodong Yu, Zewen Wu, Zhen Zhan +2
Dodecagonal bilayer graphene quasicrystal has 12-fold rotational order but lacks translational symmetry which prevents the application of band theory. In this paper, we study the e…
Large-area, periodic, and tunable intrinsic pseudo-magnetic fields in low-angle twisted bilayer graphene
Haohao Shi, Zhen Zhan, Zhikai Qi +11
A properly strained graphene monolayer or bilayer is expected to harbour periodic pseudo-magnetic fields with high symmetry, yet to date, a convincing demonstration of such pseudo-…
Implications of the Klein tunneling times on high frequency graphene devices using Bohmian trajectories
Devashish Pandey, Matteo Villani, Enrique Colomés +2
Because of its large Fermi velocity, leading to a great mobility, graphene is expected to play an important role in (small signal) radio frequency electronics. Among other, graphen…
Quantum time-dependent Monte Carlo simulation of electron devices with 2D linear-band materials: a genuine TeraHertz signature for graphene
Zhen Zhan, Xueheng Kuang, Enrique Colomés +3
An intrinsic electron injection model for linear band two-dimensional (2D) materials, like graphene, is presented and its coupling to a recently developed quantum time-dependent Mo…
Quantum dissipation with conditional wave functions: Application to the realistic simulation of nanoscale electron devices
E. Colomés, Z. Zhan, D. Marian +1
Without access to the full quantum state, modeling dissipation in an open system requires approximations. The physical soundness of such approximations relies on using realistic mi…
Limitations of the intrinsic cut-off frequency to correctly quantify the speed of nanoscale transistors
Zhen Zhan, Enrique Colomés, Xavier Oriols
The definition of the intrinsic cut-off frequency () based on the current gain equals to one (0 dB) is critically analyzed. A condition for the validity of the quasi-static es…
Time-dependent simulation of particle and displacement currents in THz graphene transistors
Z. Zhan, E. Colomès, A. Benali +2
Although time-independent models provide very useful dynamical information with a reduced computational burden, going beyond the quasi-static approximation provides enriched inform…
Comparing Wigner, Husimi and Bohmian distributions: Which one is a true probability distribution in phase space?
E. Colomés, Z. Zhan, X. Oriols
The Wigner distribution function is a quasi-probability distribution. When properly integrated, it provides the correct charge and current densities, but it gives negative probabil…