749 citations · 7.8k across the 130 of their papers we have counts for
57 papers · 1 filter
Superconducting valence bond fluid in lightly doped 8-leg - cylinders
Hong-Chen Jiang, Steven A. Kivelson, Dung-Hai Lee
Superconductivity in doped quantum paramagnets has been a subject of long theoretical inquiry. In this work we report a density matrix renormalization group study of lightly doped…
Non-abelian bosonization of fermion symmetry-protected topological states
Yen-Ta Huang, Dung-Hai Lee
Applying the results of Ref.[1], we carry out the non-abelian bosonization for a class of free fermion symmetry-protected topological states (SPTs). The resulting boson theories ar…
The electromagnetic duality and the 3+1D O(6) non-linear sigma model with a level-1 Wess-Zumino-Witten term
Yen-Ta Huang, Dung-Hai Lee
We show that in (3+1)-D space-time dimensions, the O(6) non-linear sigma model, with a level-1 Wess-Zumino-Witten term, exhibits the electromagnetic duality. If we name the six com…
Competing orders, the Wess-Zumino-Witten term, and spin liquids
Yen-Ta Huang, Dung-Hai Lee
In this paper, we demonstrate that in frustrated magnets when several conventional (i.e., symmetry-breaking) orders compete, and are "intertwined" by a Wess-Zumino-Witten (WZW) ter…
Fractional Vortices, Gauge Theory, and the Confinement-Deconfinement Transition
Zhi-Qiang Gao, Yen-Ta Huang, Dung-Hai Lee
In this paper we discuss the classical 3D XY model whose nearest-neighbor interaction is a mixture of (ferromagnetic) and (nematic). This model is…
Non-abelian bosonization in two and three spatial dimensions and applications
Yen-Ta Huang, Dung-Hai Lee
In this paper, we generalize Witten's non-abelian bosonization in -D to two and three spatial dimensions. Our theory applies to fermions with relativistic dispersion. The bo…
The "non-regularizability" of gapless free fermion Hamiltonian protected by on-site symmetries
Yen-Ta Huang, Lokman Tsui, Dung-Hai Lee
The non-regularizability of free fermion field theories, which is the root of various quantum anomalies, plays a central role in particle physics and modern condensed matter physic…
The thermal Hall conductance of two doped symmetry-breaking topological insulators
Zi-Xiang Li, Dung-Hai Lee
In this paper we study two models of symmetry-breaking topological insulators. They are the variants of the d-density wave Hamiltonian proposed by Chakravarty, Laughlin, Morr and N…
A Holographic Theory for the Phase Transitions Between Fermionic Symmetry-protected Topological States
Lokman Tsui, Yen-Ta Huang, Dung-Hai Lee
In an earlier work we developed a holographic theory for the phase transition between bosonic symmetry-protected topological (SPT) states. This paper is a continuation of it. Here…
Superconductivity in the presence of strong electron-phonon interactions and frustrated charge order
Zi-Xiang Li, Marvin L. Cohen, Dung-Hai Lee
We study the superconductivity of strongly coupled electron-phonon systems where the geometry of the lattice frustrates the charge order by the sign-problem-free Quantum Monte Carl…
Electronic and phononic properties of a two dimensional electron gas coupled to dipolar phonons via small-momentum-transfer scattering
Zi-Xiang Li, T. P. Devereaux, Dung-Hai Lee
We study the electron and phonon spectral functions as well as superconductivity for a two dimensional electron gas couped to dipolar phonons via small-momentum transfer scattering…
Rapid change of superconductivity and electron-phonon coupling through 19% doping in Bi2212
Yu He, Makoto Hashimoto, Dongjoon Song +12
Electron-boson coupling plays a key role in superconductivity for many systems. However, in copper-based high-temperature () superconductors, its relation to superconductivity…
Does the existence of Majorana zero mode in superconducting vortices imply the superconductivity is topologically non-trivial?
Lokman Tsui, Zi-Xiang Li, Yen-Ta Huang +2
We show that the presence of Majorana zero modes (2D), and chiral-dispersing Majorana modes (3D), in the vortex cores of superconductors are neither sufficient nor necessary condit…
Symmetry protected topological Luttinger liquids and the phase transition between them
Hong-Chen Jiang, Zi-Xiang Li, Alexander Seidel +1
We show that a doped spin-1/2 ladder with antiferromagnetic intra-chain and ferromagnetic inter-chain coupling is a symmetry protected topologically non-trivial Luttinger liquid. T…
The phase transitions between bosonic topological phases in 1+1 D, and a constraint on the central charge for the critical points between bosonic symmetry protected topological phases
Lokman Tsui, Yen-Ta Huang, Hong-Chen Jiang +1
The study of continuous phase transitions triggered by spontaneous symmetry breaking has brought revolutionary ideas to physics. Recently, through the discovery of symmetry protect…
Compass Impurity Model of Tb Substitution in Sr2IrO4
Long Zhang, Fa Wang, Dung-Hai Lee
We show that upon Tb substitution the interaction between the magnetic moments on the impurity Tb ion and its surrounding Ir ions is described by a "compass" model, i…
Topological versus Landau-like phase transitions
Lokman Tsui, Fa Wang, Dung-Hai Lee
The study of continuous phase transitions triggered by spontaneous symmetry breaking has brought new concepts that revolutionized the way we understand many-body systems. Recently,…
What Makes the of FeSe/SrTiO so High ?
Dung-Hai Lee
This note reviews some of the recent progresses in the study of high temperature superconductivity in the interface between a single unit cell FeSe and SrTiO. It offers the aut…
Quantum Phase Transitions Between a Class of Symmetry Protected Topological States
Lokman Tsui, Hong-Chen Jiang, Yuan-Ming Lu +1
The subject of this paper is the phase transition between symmetry protected topological states (SPTs). We consider spatial dimension and symmetry group so that the cohomol…
Influence of Optically Quenched Superconductivity on Quasiparticle Relaxation Rates in Bi2Sr2CaCu2O8+delta
Christopher L. Smallwood, Wentao Zhang, Tristan L. Miller +9
We use time- and angle-resolved photoemission to measure quasiparticle relaxation dynamics across a laser-induced superconducting phase transition in Bi2Sr2CaCu2O8+delta. Whereas l…
Nematicity and quantum paramagnetism in FeSe
Fa Wang, Steven A. Kivelson, Dung-Hai Lee
In common with other iron-based high temperature superconductors, FeSe exhibits a transition to a ``nematic'' phase below 90Kelvin in which the crystal rotation symmetry is spontan…
Time-reversal-invariant topological superconductivity in n-doped BiH
Fan Yang, Cheng-Cheng Liu, Yu-Zhong Zhang +2
Intrinsic and symmetry protected topological states have attracted lots of interest in condensed matter physics recently. In particular, time reversal symmetry protected fermion to…
Time- and Momentum-resolved Gap Dynamics in Bi2Sr2CaCu2O8+delta
Christopher L. Smallwood, Wentao Zhang, Tristan L. Miller +4
We use time- and angle-resolved photoemission spectroscopy to characterize the dynamics of the energy gap in superconducting Bi2Sr2CaCu2O8+delta (Bi2212). Photoexcitation drives th…
Gapped symmetric edges of symmetry protected topological phases
Yuan-Ming Lu, Dung-Hai Lee
Symmetry protected topological (SPT) phases are gapped quantum phases which host symmetry-protected gapless edge excitations. On the other hand, the edge states can be gapped by sp…