Publications (176)
Quantum Anomalous Hall Effect with Cold Atoms Trapped in a Square Lattice
Xiong-Jun Liu, Xin Liu, Congjun Wu +1
We propose an experimental scheme to realize and detect the quantum anomalous Hall effect in an anisotropic square optical lattice which can be generated from available experimenta…
Competing orders in one dimensional spin 3/2 fermionic systems
Congjun Wu
Novel competing orders are found in spin 3/2 cold atomic systems in one-dimensional optical traps and lattices. In particular, the quartetting phase, a four-fermion counterpart of…
Orbital ice: an exact Coulomb phase on the diamond lattice
Gia-Wei Chern, Congjun Wu
We demonstrate the existence of orbital Coulomb phase as the exact ground state of p-orbital exchange Hamiltonian on the diamond lattice. The Coulomb phase is an emergent state cha…
Nonvolatile electric switching of critical current in cross-bar superconducting junctions
Jiajun Ma, Jingyi He, Qiong Qin +5
Superconducting (SC) diodes are key passive building blocks for future SC electronics. However, realizing their active counterparts is essential for functional logic. Here, we demo…
Slater and Mott insulating states in the SU(6) Hubbard model
Da Wang, Lei Wang, Congjun Wu
We perform large scale projector determinant quantum Monte-Carlo simulations to study the insulating states of the half-filled SU(6) Hubbard model on the square lattice. The transi…
Quantum Monte Carlo simulation of thermodynamic properties of SU(2N) ultracold fermions in optical lattices
Zhichao Zhou, Zi Cai, Congjun Wu +1
We have systematically studied the thermodynamic properties of a two-dimensional half-filled SU(2N) Hubbard model on a square lattice by using the determinant quantum Monte Carlo m…
Orbital analogue of quantum anomalous Hall effect in -band systems
Congjun Wu
We investigate the topological insulating states of the -band systems in optical lattices induced by the onsite orbital angular momentum polarization, which exhibit gapless edge…
Schwinger boson mean field theory of the Heisenberg Ferrimagnetic Spin Chain
Congjun Wu, Bin Chen, Xi Dai +2
The Schwinger boson mean field theory is applied to the quantum ferrimagnetic Heisenberg chain. There is a ferrimagnetic long range order in the ground state. We observe two branch…
The J-triplet Cooper pairing with magnetic dipolar interactions
Yi Li, Congjun Wu
Recently, cold atomic Fermi gases with the large magnetic dipolar interaction have been laser cooled down to quantum degeneracy. Different from electric-dipoles which are classic v…
Singularity and universality from von Neumann to Rényi entanglement entropy and disorder operator in Motzkin chains
Jianyu Wang, Zenan Liu, Zheng Yan +1
The Rényi entanglement entropy is widely used in studying quantum entanglement properties in strongly correlated systems, whose analytic continuation as the Rényi index …
Charge 4e superconductivity and chiral metal in the -twisted bilayer cuprates and similar bilayers
Yu-Bo Liu, Jing Zhou, Congjun Wu +1
The material realization of the charge-4e/6e superconductivity (SC) is a big challenge. Here we propose realization of the charge-4e SC and chiral metal through stacking a homo-bil…
Quantum critical dynamics for a prototype class of insulating antiferromagnets
Jianda Wu, Wang Yang, Congjun Wu +1
Quantum criticality is a fundamental organizing principle for studying strongly correlated systems. Nevertheless, understanding quantum critical dynamics at nonzero temperatures is…
Resonating plaquette phases in large spin cold atom systems
Cenke Xu, Congjun Wu
Large spin cold atom systems can exhibit novel magnetic properties which do not appear in usual spin-1/2 systems. We investigate the SU(4) resonating plaquette state in the three d…
Incommensurate superfluidity of bosons in a double-well optical lattice
Vladimir M. Stojanovic, Congjun Wu, W. Vincent Liu +1
We study bosons in the first excited Bloch band of a double-well optical lattice, recently realized at NIST. By calculating the relevant parameters from a realistic nonseparable la…
Interacting topological mirror excitonic insulator in one dimension
Lun-Hui Hu, Rui-Xing Zhang, Fu-Chun Zhang +1
We introduce the topological mirror excitonic insulator as a new type of interacting topological crystalline phase in one dimension. Its mirror-symmetry-protected topological prope…
Impact of Pressure and Apical Oxygen Vacancies on Superconductivity in LaNiO
Chen Lu, Ming Zhang, Zhiming Pan +2
The bilayer nickelate LaNiO under pressure has recently emerged as a promising system for high- superconductivity. In this work, we investigate the fate of the sup…
Quasiparticle Interference on the Surface of the Topological Insulator BiTe
Wei-Cheng Lee, Congjun Wu, Daniel P. Arovas +1
The quasiparticle interference of the spectroscopic imaging scanning tunneling microscopy has been investigated for the surface states of the large gap topological insulator Bi…
Fermi liquid instabilities in the spin channel
Congjun Wu, Kai Sun, Eduardo Fradkin +1
We study the Fermi surface instabilities of the Pomeranchuk type in the spin triplet channel with high orbital partial waves (). The ordered phases are classified i…
Evidence for Quantum Stripe Ordering in a Triangular Optical Lattice
Xiao-Qiong Wang, Guang-Quan Luo, Jin-Yu Liu +5
Understanding strongly correlated quantum materials, such as high superconductors, iron-based superconductors, and twisted bilayer graphene systems, remains to be on…
Spontaneous time-reversal symmetry breaking in the boundary Majorana flat bands
Yi Li, Da Wang, Congjun Wu
We study the boundary Majorana modes for the single component p-wave weak topological superconductors or superfluids, which form zero energy flat bands protected by time-reversal s…
A sufficient condition for the absence of the sign problem in the fermionic quantum Monte-Carlo algorithm
Congjun Wu, Shou-Cheng Zhang
Quantum Monte-Carlo (QMC) simulations involving fermions have the notorious sign problem. Some well-known exceptions of the auxiliary field QMC algorithm rely on the factorizibilit…
Possible Liquid-Nitrogen-Temperature Superconductivity Driven by Perpendicular Electric Field in the Single-Bilayer Film of LaNiO at Ambient Pressure
Zhi-Yan Shao, Jia-Heng Ji, Congjun Wu +2
Recently, high-temperature superconductivity (HTSC) is found in the LaNiO/SrLaAlO ultrathin film with critical temperature above the McMillan limit at ambient…
Unconventional states of bosons with synthetic spin-orbit coupling
Xiangfa Zhou, Yi Li, Zi Cai +1
Spin-orbit coupling with bosons gives rise to novel properties that are absent in usual bosonic systems. Under very general conditions, the conventional ground state wavefunctions…
Exact SO(5) Symmetry in spin 3/2 fermionic system
Congjun Wu, Jiang-ping Hu, Shou-cheng Zhang
The spin 3/2 fermion models with contact interactions have a {\it generic} SO(5) symmetry without any fine-tuning of parameters. Its physical consequences are discussed in both the…
Unification of valley and anomalous Hall effects in a strained lattice
Jiale Yuan, Han Cai, Congjun Wu +3
Two dimensional lattices are an important stage for studying many aspects of quantum physics, in particular the topological phases. The valley Hall and anomalous Hall effects are t…
A new paradigm for the quantum spin Hall effect at high temperatures
Gang Li, Werner Hanke, Ewelina M. Hankiewicz +5
The quantum spin Hall effect (QSHE) has formed the seed for contemporary research on topological quantum states of matter. Since its discovery in HgTe/CdTe quantum wells and AlGaAs…
A -matrix generalization of the Kitaev model
Congjun Wu, Daniel Arovas, Hsiang-Hsuan Hung
We extend the Kitaev model defined for the Pauli-matrices to the Clifford algebra of -matrices, taking the representation as an example. On a decorated square latt…
Interaction effects with varying in SU() symmetric fermion lattice systems
Shenglong Xu, Julio Barreiro, Yu Wang +1
The interaction effects in ultracold Fermi gases with SU() symmetry are studied non-perturbatively in half-filled one-dimensional lattices by employing quantum Monte Carlo simul…
Competing orders in the 2D half-filled SU(2N) Hubbard model through the pinning field quantum Monte-Carlo simulations
Da Wang, Yi Li, Zi Cai +3
We non-perturbatively investigate the ground state magnetic properties of the 2D half-filled SU() Hubbard model in the square lattice by using the projector determinant quantum…
Quantitative Test of SO(5) Symmetry in the Vortex State of
Han-Dong Chen, Congjun Wu, Shou-Cheng Zhang
By numerically solving models with competing superconducting and antiferromagnetic orders, we study the magnetic field dependence of the antiferromagnetic moment in both the weak a…
Unconventional symmetries of Fermi liquid and Cooper pairing properties with electric and magnetic dipolar fermions
Yi Li, Congjun Wu
The rapid experimental progress of ultra-cold dipolar fermions opens up a whole new opportunity to investigate novel many-body physics of fermions. In this article, we review theor…
Quantum magnetism of ultra-cold fermion systems with the symplectic symmetry
Hsiang-hsuan Hung, Yupeng Wang, Congjun Wu
We numerically study quantum magnetism of ultra-cold alkali and alkaline-earth fermion systems with large hyperfine spin , which are characterized by a generic symme…
-wave pairing of cold atoms in optical lattices
Wei-Cheng Lee, Congjun Wu, S. Das Sarma
The tremendous development of cold atom physics has opened up a whole new opportunity to study novel states of matter which are not easily accessible in solid state systems. Here w…
Spontaneous inhomogeneous phases in ultracold dipolar Fermi gases
Kai Sun, Congjun Wu, S. Das Sarma
We study the collapse of ultracold fermionic gases into inhomogeneous states due to strong dipolar interaction in both 2D and 3D. Depending on the dimensionality, we find that two…
Non-abelian Berry's phase and Chern numbers in higher spin pairing condensates
Chyh-Hong Chern, Han-Dong Chen, Congjun Wu +2
We show that the non-Abelian Berry phase emerges naturally in the s-wave and spin quintet pairing channel of spin-3/2 fermions. The topological structure of this pairing condensate…
Exotic many-body physics with large-spin Fermi gases
Congjun Wu
The experimental realization of quantum degenerate cold Fermi gases with large hyperfine spins opens up a new opportunity for exotic many-body physics.
Pairing without -Pocket in the LaNiO Thin Film
Zhi-Yan Shao, Chen Lu, Min Liu +4
The recent discovery of high-temperature superconductivity (HTSC) in the LaNiO ultrathin film at ambient pressure has aroused great research interest. The -pocket f…
Quaternion, harmonic oscillator, and high-dimensional topological states
Congjun Wu
Quaternion, an extension of complex number, is the first discovered non-commutative division algebra by William Rowan Hamilton in 1843. In this article, we review the recent progre…
Two-Dimensional Space-Time Groups: Classification and Applications
Chenhang Ke, Congjun Wu
The concept of space group has long served as the fundamental framework to describe the physical properties of crystalline materials, from electronic bands to photonic dispersions.…
Superconductivity in trilayer nickelate La4Ni3O10 under pressure
Mingxin Zhang, Cuiying Pei, Di Peng +28
Nickelate superconductors have attracted a great deal of attention over the past few decades due to their similar crystal and electronic structures with high-temperature cuprate su…
Electric Space-time Translation and Floquet-Bloch Wavefunction
Chenhang Ke, Kun Yang, Congjun Wu
As for the study of Landau level wavefunctions for the quantum Hall effect, the magnetic Bloch wavefunctions based on the magnetic translation symmetry have been extensively invest…
Spin-orbit coupled Fermi liquid theory of ultra-cold magnetic dipolar fermions
Yi Li, Congjun Wu
We investigate Fermi liquid states of the ultra-cold magnetic dipolar Fermi gases in the simplest two-component case including both thermodynamic instabilities and collective excit…
Prediction of quantum stripe ordering in optical lattices
Congjun Wu, W. Vincent Liu, Joel Moore +1
We predict the robust existence of a novel quantum orbital stripe order in the -band Bose-Hubbard model of two-dimensional triangular optical lattices with cold bosonic atoms. A…
Quantum criticality of bosonic systems with the Lifshitz dispersion
Jianda Wu, Fei Zhou, Congjun Wu
We study the quantum criticality of the Lifshitz -theory below the upper critical dimension. Two fixed points, one Gaussian and the other non-Gaussian, are identified with ze…
An Explicit Wavefunction of the Interacting Non-Hermitian Spin-1/2 1D System
Yue Wang, Xiangyu Zhang, Zhesen Yang +1
We present an explicit Bethe-ansatz wavefunction to a 1D spin- interacting fermion system, manifesting a many-body resonance resulting from the interplay between inter…
Superconducting junction with tri-component pairing gap functions
Chao Xu, Wang Yang, Congjun Wu
We study a superconducting hetro-junction with one side characterized by the unconventional chiral -wave gap function and the other side the conventional -wave…
Spin Quadrupolar orders in -wave Unconventional Magnetism
Jian-Keng Yuan, Zhiming Pan, Congjun Wu
Unconventional magnetism represents a class of metallic states whose Fermi surfaces exhibit spin-dependent splittings under the non-trivial representations of the rotation group. T…
Vortex structures of rotating spin-orbit coupled Bose-Einstein condensates
Xiang-Fa Zhou, Jing Zhou, Congjun Wu
We consider the quasi-2D two-component Bose-Einstein condensates with Rashba spin-orbit (SO) coupling in a rotating trap. An external Zeeman term favoring spin polarization along t…
Mott transition in the -flux SU() Hubbard model on a square lattice
Zhichao Zhou, Congjun Wu, Yu Wang
We employ the projector quantum Monte Carlo simulations to study the ground-state properties of the square-lattice SU(4) Hubbard model with a flux per plaquette. In the weak c…
Particle-hole symmetry and interaction effects in the Kane-Mele-Hubbard model
Dong Zheng, Guang-Ming Zhang, Congjun Wu
We prove that the Kane-Mele-Hubbard model with purely imaginary next-nearest-neighbor hoppings has a particle-hole symmetry at half-filling. Such a symmetry has interesting consequ…
From confined spinons to emergent fermions: Observation of elementary magnetic excitations in a transverse-field Ising chain
Zhe Wang, Jianda Wu, Shenglong Xu +11
We report on spectroscopy study of elementary magnetic excitations in an Ising-like antiferromagnetic chain compound SrCoVO as a function of temperature and applied tra…
Two-orbital model for possible superconductivity pairing mechanism in nickelates
Chen Lu, Lun-Hui Hu, Yu Wang +2
The newly synthesized strontium doped RNiO (R=Nd, La) superconductors have stimulated extensive interests in understanding their pairing mechanism and pairing nature. Here we s…
Dynamic generation of spin orbit coupling
Congjun Wu, Shou-Cheng Zhang
Spin-orbit coupling plays an important role in determining the properties of solids, and is crucial for spintronics device applications. Conventional spin-orbit coupling arises mic…
Vortex configurations of bosons in an optical lattice
Congjun Wu, Han-dong Chen, Jiang-ping Hu +1
The single vortex problem in a strongly correlated bosonic system is investigated self-consistently within the mean-field theory of the Bose-Hubbard model. Near the superfluid-Mott…
2D and 3D topological insulators with isotropic and parity-breaking Landau levels
Yi Li, Xiangfa Zhou, Congjun Wu
We investigate topological insulating states in both two and three dimensions with the harmonic potential and strong spin-orbit couplings breaking the inversion symmetry. Landau-le…
Topological septet pairing with spin- fermions -- high partial-wave channel counterpart of the He-B phase
Wang Yang, Yi Li, Congjun Wu
We systematically generalize the exotic He-B phase, which not only exhibits unconventional symmetry but is also isotropic and topologically non-trivial, to arbitrary partial-wa…
Orbital ordering and frustration of -band Mott-insulators
Congjun Wu
We investigate the general structure of orbital exchange physics in Mott-insulating states of -orbital systems in optical lattices. Orbital orders occur in both the triangular a…
Josephson diode effect: a phenomenological perspective
Da Wang, Qiang-Hua Wang, Congjun Wu
As a novel quantum phenomenon with nonreciprocal supercurrent, the Josephson diode effect was intensively studied in recent years. Here, we construct a generalized resistively capa…
Topological insulators with SU(2) Landau levels
Yi Li, Shou-Cheng Zhang, Congjun Wu
We construct continuum models of 3D and 4D topological insulators by coupling spin-1/2 fermions to an SU(2) background gauge field, which is equivalent to a spatially dependent spi…
Anisotropic Fermi liquid theory of the ultra cold fermionic polar molecules: Landau parameters and collective modes
Ching-Kit Chan, Congjun Wu, Wei-cheng Lee +1
We study the Fermi liquid properties of the cold atomic dipolar Fermi gases with the explicit dipolar anisotropy using perturbative approaches. Due to the explicit dipolar anisotro…
Nonzero angular momentum density wave phases in SU() fermions with singlet-bond and triplet-current interactions
Han Xu, Congjun Wu, Yu Wang
We employ the sign-problem-free projector determinant quantum Monte Carlo method to study a microscopic model of SU() fermions with singlet-bond and triplet-current interactions…
Competing Orders in Coupled Luttinger Liquids
Congjun Wu, W. Vincent Liu, Eduardo Fradkin
We consider the problem of two coupled Luttinger liquids both at half filling and at low doping levels, to investigate the problem of competing orders in quasi-one-dimensional stro…
Synthetic Landau levels and spinor vortex matter on Haldane spherical surface with magnetic monopole
Xiang-Fa Zhou, Congjun Wu, Guang-Can Guo +3
We present a flexible scheme to realize exact flat Landau levels on curved spherical geometry in a system of spinful cold atoms. This is achieved by Floquet engineering of a magnet…
3D quaternionic condensations, Hopf invariants, and skyrmion lattices with synthetic spin-orbit coupling
Yi Li, Xiangfa Zhou, Congjun Wu
We study the topological configurations of the two-component condensates of bosons with the D Weyl-type spin-orbit coupling subject to a harmonic trapping…
Unconventional Bose-Einstein Condensations Beyond the "No-node" Theorem
Congjun Wu
Feynman's "no-node" theorem states that the conventional many-body ground-state wavefunctions of bosons in the coordinate representation is positive-definite. This implies that tim…
Spin-orbit coupling induced magnetism in the -density wave phase of LaBaCuO superconductors
Congjun Wu, Jan Zaanen, Shou-Cheng Zhang
We study the effects of spin-orbit coupling in the -density wave (DDW) phase. In the low-temperature orthorhombic phase of LaBaCuO, we find that spin-orbit coupl…
Thermodynamic properties of the d-density wave order in cuprates
Congjun Wu, W. Vincent Liu
We solve a popular effective Hamiltonian of competing -density wave and d-wave superconductivity orders self-consistently at the mean-field level for a wide range of doping and…
Band Collapse and the Quantum Hall Effect in Graphene
B. Andrei Bernevig, Taylor L. Hughes, Han-Dong Chen +2
The recent Quantum Hall experiments in graphene have confirmed the theoretically well-understood picture of the quantum Hall (QH) conductance in fermion systems with continuum Dira…
Pomeranchuk cooling of the SU() ultra-cold fermions in optical lattices
Zi Cai, Hsiang-hsuan Hung, Lei Wang +2
We investigate the thermodynamic properties of a half-filled SU(2N) Fermi-Hubbard model in the two-dimensional square lattice using the determinantal quantum Monte Carlo simulation…
Quasiparticle Interference in the Unconventional Metamagnetic Compound SrRuO
Wei-Cheng Lee, D. P. Arovas, Congjun Wu
Quasiparticle interference (QPI) in spectroscopic imaging scanning tunneling microscopy provides a powerful method to detect orbital band structures and orbital ordering patterns i…
Mixed triplet and singlet pairing in multicomponent ultracold fermion systems with dipolar interactions
Congjun Wu, J. E. Hirsch
The symmetry properties of the Cooper pairing problem for multi-component ultra-cold dipolar molecular systems are investigated. The dipolar anisotropy provides a natural and robus…
Mott made easy
Congjun Wu
The realization of a Mott insulating state in a system of ultracold fermions comprising far more internal components than the electron, provides an avenue for probing many-body phy…
Phase-Sensitive Detection for Unconventional Bose-Einstein Condensations
Zi Cai, Lu-Ming Duan, Congjun Wu
We propose a phase-sensitive detection scheme to identify the unconventional symmetry of the condensate wavefunctions of bosons, which have already been proposed…
Majorana surface modes of nodal topological pairings in spin- semi-metals
Wang Yang, Tao Xiang, Congjun Wu
Multi-component electronic systems can appear in solid state systems with active orbital band structures. They exhibit richer structures of topological superconductivity beyond the…
Interplay of two orbitals in Superconducting LaNiO Under Pressure
Chen Lu, Zhiming Pan, Fan Yang +1
The discovery of high- superconductivity (SC) in LaNiO (LNO) has aroused a great deal of interests. Previously, it was proposed that the Ni- orbital is c…
Four-coloring model and frustrated superfluidity in the diamond lattice
Gia-Wei Chern, Congjun Wu
We propose a novel four-coloring model which describes "frustrated superfluidity" of -band bosons in the diamond optical lattice. The superfluid phases of the condensate wavefun…
Absence of the zero bias peak in vortex tunneling spectra of high temperature superconductors?
Congjun Wu, Tao Xiang, Zhao-Bin Su
The c-axis tunneling matrix of high-Tc superconductors is shown to depend strongly on the in-plane momentum of electrons and vanish along the four nodal lines of the d(x^2-y^2)-wav…
Flat bands and Wigner crystallization in the honeycomb optical lattice
Congjun Wu, Doron Bergman, Leon Balents +1
We study the ground states of cold atoms in the tight-binding bands built from p-orbitals on a two dimensional honeycomb optical lattice. The band structure includes two completely…
Orbital-Active Dirac Materials from the Symmetry Principle
Shenglong Xu, Congjun Wu
Dirac materials, starting with graphene, have drawn tremendous research interest in the past decade. Instead of focusing on the orbital as in graphene, we move a step further…
One-dimensional Quantum Spin Dynamics of Bethe String States
Wang Yang, Jianda Wu, Shenglong Xu +2
Quantum dynamics of strongly correlated systems is a challenging problem. Although the low energy fractional excitations of one dimensional integrable models are often well-underst…
Superconducting diode effect and interference patterns in Kagome CsV3Sb5
Tian Le, Zhiming Pan, Zhuokai Xu +8
The interplay among frustrated lattice geometry, nontrivial band topology and correlation yields rich quantum states of matter in Kagome systems. A series of recent members in this…
Unconventional Bose-Einstein condensations from spin-orbit coupling
Congjun Wu, Ian Mondragon-Shem, Xiang-Fa Zhou
According to the "no-node" theorem, many-body ground state wavefunctions of conventional Bose-Einstein condensations (BEC) are positive-definite, thus time-reversal symmetry cannot…
Josephson Diode
Jiangping Hu, Congjun Wu, Xi Dai
We propose a new type of Josephson junction formed by two superconductors close to the superconductor-Mott-insulator transition, one of which is doped with holes and the other is d…
Two-band model for magnetism and superconductivity in nickelates
Lun-Hui Hu, Congjun Wu
The recently discovered superconductivity in NdSrNiO provides a new opportunity for studying strongly correlated unconventional superconductivity. The single-hole N…
Time-reversal symmetry breaking superconductivity in the presence of loop-current fluctuations
Zenghui Fan, Runyu Ma, Stefano Chesi +2
Loop currents have been proposed in various superconductors and recently confirmed in kagome materials, raising a fundamental question regarding their intrinsic connection to super…
Quantum dynamics, particle delocalization and instability of Mott states: the effect of fermion-boson conversion on Mott states
Fei Zhou, Congjun Wu
We study the quantum dynamics of superfluids of bosons hybridized with Cooper pairs near Feshbach resonances and the influence of fermion-boson conversion on Mott states. We derive…
Magnetotransport in overdoped LaSrCuO: a Fermi liquid approach
Rui-Ying Mao, Da Wang, Congjun Wu +1
Recently, several experiments on LaSrCuO (LSCO) challenged the Fermi liquid picture for overdoped cuprates, and stimulated intensive debates [1]. In this work, we s…
Ferromagnetism and Wigner crystallization in Kagome graphene and related structures
Yuanping Chen, Shenglong Xu, Yuee Xie +3
Interaction in a flat band is magnified due to the divergence in the density of states, which gives rise to a variety of many-body phenomena such as ferromagnetism and Wigner cryst…
Current Carrying Ground State in a Bi-layer Model
Sylvain Capponi, Congjun Wu, Shou-Cheng Zhang
Strongly interacting systems have been conjectured to spontaneously develop current carrying ground states under certain conditions. We conclusively demonstrate the existence of a…
Space-time crystal and space-time group
Shenglong Xu, Congjun Wu
Crystal structures and the Bloch theorem play a fundamental role in condensed matter physics. We extend the static crystal to the dynamic "space-time" crystal characterized by the…
Exotic phases of interacting p-band bosons
F. Hébert, Zi Cai, V. G. Rousseau +3
We study a model of interacting bosons that occupy the first excited p-band states of a two-dimensional optical lattice. In contrast to the much studied single band Bose-Hubbard Ha…
Electronic and Structural Properties of C Molecule
Xiaoqing Yu, Congjun Wu, Chui-lin Wang +1
The extended SSH model and Bogoliubov-de Gennes(BdeG) formalism are applied to investigate the electronic properties and stable lattice configurations of C. We focus the pro…
Doping-driven Antiferromagnetic Insulator -- Superconductor Transition: a Quantum Monte Carlo Study
Tianxing Ma, Da Wang, Congjun Wu
How superconductivity emerges in the vicinity of an antiferromagnetic insulating state is a long-standing issue of strong correlation physics. We study the transition from an antif…
Emergent Weyl Fermions in an Orbital Multipolar Ordering Phase
Hua Chen, Congjun Wu, X. C. Xie
Multipolar orderings in degenerate orbital systems offer unique opportunities for emergent topological phases. The phase diagram of interacting spinless fermions in a -band diam…
Collective Nuclear Polaritons with Coherent and Tunable Excitation Dynamics
Liufeng Yang, Jinling Wang, Huijun Li +3
We propose collective nuclear polaritons formed by hybridizing a 229Th nuclear ensemble with a vacuum-ultraviolet cavity mode generated via four-wave mixing, achieving a collective…
High-order Time-Reversal Symmetry Breaking Normal State
Meng Zeng, Lun-Hui Hu, Hong-Ye Hu +2
Spontaneous time-reversal symmetry breaking plays an important role in studying strongly correlated unconventional superconductors. When two superconducting gap functions with diff…
Unconventional magnetism in spin-orbit coupled systems
Jian-Keng Yuan, Zhiming Pan, Congjun Wu
``Unconventional magnetism" was proposed to describe the exotic states arising from Landau-Pomeranchuk instabilities in the spin channel nearly two decades ago. Its odd-partial-wav…
Mott insulating states of the anisotropic SU(4) Dirac fermions
Han Xu, Yu Wang, Zhichao Zhou +1
We employ the large-scale quantum Monte-Carlo simulations to investigate the Mott-insulating states of the half-filled SU(4) Hubbard model on the square lattice with a staggered-fl…
Fragile Unconventional Magnetism in RuO by Proximity to Landau-Pomeranchuk Instability
Zhuang Qian, Yudi Yang, Shi Liu +1
Altermagnetism has attracted considerable attention for its remarkable combination of spin-polarized band structures and zero net magnetization, making it a promising candidate for…
The in-plane gradient magnetic field induced vortex lattices in spin-orbit coupled Bose-Einstein condensations
Xiang-Fa Zhou, Zheng-Wei Zhou, Congjun Wu +1
We consider the ground-state properties of the two-component spin-orbit coupled ultracold bosons subject to a rotationally symmetric in-plane gradient magnetic field. In the non-in…