638 citations · 2.8k across the 18 of their papers we have counts for
18 papers
Visualizing Broken Symmetry and Topological Defects in a Quantum Hall Ferromagnet
Xiaomeng Liu, Gelareh Farahi, Cheng-Li Chiu +5
The interaction between electrons in graphene under high magnetic fields drives the formation of a rich set of quantum Hall ferromagnetic phases (QHFM), with broken spin or valley…
Evidence for unconventional superconductivity in twisted bilayer graphene
Myungchul Oh, Kevin P. Nuckolls, Dillon Wong +5
The emergence of superconductivity with doping from correlated insulators in magic-angle twisted bilayer graphene (MATBG) has raised the intriguing possibility that its pairing mec…
Crossover between Strongly-coupled and Weakly-coupled Exciton Superfluids
Xiaomeng Liu, J. I. A. Li, Kenji Watanabe +5
In fermionic systems, superconductivity and superfluidity are enabled through the condensation of fermion pairs. The nature of this condensate can be tuned by varying the pairing s…
Evidence for a Monolayer Excitonic Insulator
Yanyu Jia, Pengjie Wang, Cheng-Li Chiu +19
The interplay between topology and correlations can generate a variety of quantum phases, many of which remain to be explored. Recent advances have identified monolayer WTe2 as a p…
Spectroscopy of a Tunable Moiré System with a Correlated and Topological Flat Band
Xiaomeng Liu, Cheng-Li Chiu, Jong Yeon Lee +5
Moiré superlattices created by the twisted stacking of two-dimensional crystalline monolayers can host electronic bands with flat energy dispersion in which interaction among elect…
Deep-ultraviolet Layered Oxide B2S2O9 with Strong and Robust Second Harmonic Generation
Lei Kang, Xiaomeng Liu, Zheshuai Lin +1
Two-dimensional (2D) layered semiconductors with both ultrawide bandgap and strong second harmonic generation (SHG) are essential for expanding the nonlinear optical (NLO) applicat…
Spectroscopic signatures of many-body correlations in magic angle twisted bilayer graphene
Yonglong Xie, Biao Lian, Berthold Jäck +6
The discovery of superconducting and insulating states in magic angle twisted bilayer graphene (MATBG) has ignited considerable interest in understanding the nature of electronic i…
The light-harvesting complex 2 of allochromatium vinosum: B800 absorption band splitting and exciton relaxation
Xiaomeng Liu, Oliver Kühn
Allochromatium (Alc.) vinosum has a double-peak structure of its absorption band around 800~nm. Previously, the excitonic origin of this feature has been demonstrated experimentall…
Spin-polarized Correlated Insulator and Superconductor in Twisted Double Bilayer Graphene
Xiaomeng Liu, Zeyu Hao, Eslam Khalaf +5
Ferromagnetism and superconductivity typically compete with each other since the internal magnetic field generated in a magnet suppresses the formation of spin-singlet Cooper pairs…
Theory of correlated insulating behaviour and spin-triplet superconductivity in twisted double bilayer graphene
Jong Yeon Lee, Eslam Khalaf, Shang Liu +4
Two monolayers of graphene twisted by a small `magic' angle exhibit nearly flat bands leading to correlated electronic states and superconductivity, whose precise nature including…
A DFT-based Tight-Binding Approach to the Self-consistent Description of Molecule Metal-Nanoparticle Interactions
Xiaomeng Liu, Lennart Seiffert, Thomas Fennel +1
The interaction within a hybrid system consisting of a spherical metal nanoparticle and a nearby organic dye molecule is formulated in a combined quantum-classical approach. Wherea…
Interlayer fractional quantum Hall effect in a coupled graphene double-layer
Xiaomeng Liu, Zeyu Hao, Kenji Watanabe +3
In two-dimensional (2D) electron systems under strong magnetic fields, interactions can cause fractional quantum Hall (FQH) effects. Bringing two 2D conductors to proximity, a new…
Plasmon reflections by topological electronic boundaries in bilayer graphene
Bor-Yuan Jiang, Guang-Xin Ni, Zachariah Addison +7
Domain walls separating regions of AB and BA interlayer stacking in bilayer graphene have attracted attention as novel examples of structural solitons, topological electronic bound…
Frictional magneto-Coulomb drag in graphene double-layer heterostructure
Xiaomeng Liu, Lei Wang, Kin Chung Fong +7
Coulomb interaction between two closely spaced parallel layers of electron system can generate the frictional drag effect by interlayer Coulomb scattering. Employing graphene doubl…
Landau level evolution driven by band hybridization in mirror symmetry broken ABA-stacked trilayer graphene
Yuya Shimazaki, Toru Yoshizawa, Ivan V. Borzenets +7
Layer stacking and crystal lattice symmetry play important roles in the band structure and the Landau levels of multilayer graphene. ABA-stacked trilayer graphene possesses mirror-…
Quantum Hall Drag of Exciton Superfluid in Graphene
Xiaomeng Liu, Kenji Watanabe, Takashi Taniguchi +2
Excitons are pairs of electrons and holes bound together by the Coulomb interaction. At low temperatures, excitons can form a Bose-Einstein condensate (BEC), enabling macroscopic p…
Development of high frequency and wide bandwidth Johnson noise thermometry
Jesse Crossno, Xiaomeng Liu, Thomas A. Ohki +2
We develop a high frequency, wide bandwidth radiometer operating at room temperature, which augments the traditional technique of Johnson noise thermometry for nanoscale thermal tr…
Ultralong Rydberg Cs Molecules Investigated by Combined ab initio Calculations and Perturbation Theory
Xiaomeng Liu, Yonggang Yang, Jianming Zhao +2
Vibrational properties of ultralong Rydberg Cs molecules are investigated on corresponding potential curves obtained by perturbation theory. The Rydberg Cs molecules are as…