Wang, B., Chen, Han-Dong, Sarma, S. Das
With a recently developed time evolving block decimation (TEBD) algorithm, we numerically study the ground state quantum phase diagram of fermi mixtures with attractive inter-species interactions...
d+id'-wave Superconducting States in Graphene (2007)
Jiang, Yongjin, Yao, Dao-Xin, Carlson, E. W., Chen, Han-Dong, Hu, JiangPing
We show that effective superconducting orders generally emerge at low energy in the superconducting state of graphene with conventionally defined pairing symmetry . We study such a particular...
Seo, Kangjun, Chen, Han-Dong, Hu, Jiangping
The competing orders in the particle-particle (P-P) channel and the particle-hole (P-H) channel have been proposed separately to explain the pseudogap physics in cuprates. By solving the...
Chen, Han-Dong, Nussinov, Zohar
In this work, we illustrate how a Jordan-Wigner transformation combined with symmetry considerations enables a direct solution of Kitaev's model on the honeycomb lattice. We (i) express the p-wave...
Majorana Fermions, Exact Mappings between Classical and Topological Orders (2007)
Motivated by the duality between site-centered spin and bond-centered spin in one-dimensional system, which connects two different constructions of fermions from the same set of Majorana fermions, we...
Nature of the Quantum Phase Transition in Quantum Compass Model (2006)
Chen, Han-Dong, Fang, Chen, Hu, Jiangping, Yao, Hong
In this work, we show that the quantum compass model on an square lattice can be mapped to a fermionic model with local density interaction. We introduce a mean-field approximation where the most...
Topological Dirac Band Insulators in Three Dimensions and Novel Transport Laws (2006)
Bernevig, B. Andrei, Chen, Han-Dong
This paper has been withdrawn.
Band Collapse and the Quantum Hall Effect in Graphene (2006)
Bernevig, B. Andrei, Hughes, Taylor L., Chen, Han-Dong, Wu, Congjun, Zhang, Shou-Cheng
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 Dirac spectrum. In this...
Two-Point Entanglement Near a Quantum Phase Transition (2006)
In this work, we study the two-point entanglement S(i,j), which measures the entanglement between two separated degrees of freedom (ij) and the rest of system, near a quantum phase transition. Away...
d-Wave Checkerboard Order in Cuprates (2006)
Seo, Kangjun, Chen, Han-Dong, Hu, Jiangping
We show that the d-wave ordering in particle-hole channels, dubbed d-wave checkerboard order, possesses important physics that can sufficiently explain the scanning tunneling microscopy (STM) results...
Global Phase Diagram of the High Tc Cuprates (2004)
Chen, Han-Dong, Capponi, Sylvain, Alet, Fabien, Zhang, Shou-Cheng
The high-Tc cuprates have a complex phase diagram with many competing phases. We propose a bosonic effective quantum Hamiltonian based on the projected SO(5) model with extended interactions, which...
Antiferromagnetism and Hole Pair Checkerboard in the Vortex State of High Tc Superconductors (2004)
Chen, Han-Dong, Hu, Jian-Ping, Capponi, Sylvain, Arrigoni, Enrico, Zhang, Shou-Cheng
We propose a microscopic state for the vortex phase of BSCO superconductors. Around the vortex core or above Hc2, the d wave hole pairs form a checkerboard localized in the antiferromagnetic...
Magic Doping Fractions in High-Temperature Superconductors (2004)
Komiya, Seiki, Chen, Han-Dong, Zhang, Shou-Cheng, Ando, Yoichi
We report hole-doping dependence of the in-plane resistivity \rho_{ab} in a cuprate superconductor La_{2-x}Sr_{x}CuO_{4}, carefully examined using a series of high-quality single crystals. Our...
Pair Density Wave in the Pseudogap State of High Temperature Superconductors (2004)
Chen, Han-Dong, Vafek, Oskar, Yazdani, Ali, Zhang, Shou-Cheng
Recent scanning tunneling microscopy (STM) experiments of Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta}$ have shown evidence of real-space organization of electronic states at low energies in the pseudogap...
Global Phase Diagram of the High Tc Cuprates (2003)
Chen, Han-Dong, Capponi, Sylvain, Alet, Fabien, Zhang, Shou-Cheng
The high Tc cuprates have a complex phase diagram with many competing phases. We propose a bosonic effective quantum Hamiltonian based on the projected SO(5) model with extended interactions, which...
Global Phase Diagram of the High Tc Cuprates (2003)
Chen, Han-Dong, Capponi, Sylvain, Alet, Fabien, Zhang, Shou-Cheng
The high-Tc cuprates have a complex phase diagram with many competing phases. We propose a bosonic effective quantum Hamiltonian based on the projected SO(5) model with extended interactions, which...
Global Phase Diagram of the High Tc Cuprates (2003)
Chen, Han-Dong, Capponi, Sylvain, Alet, Fabien, Zhang, Shou-Cheng
The high-Tc cuprates have a complex phase diagram with many competing phases. We propose a bosonic effective quantum Hamiltonian based on the projected SO(5) model with extended interactions, which...
Quantitative Test of SO(5) Symmetry in the Vortex State of $Nd_{1.85}Ce_{0.15}CuO_4$ (2003)
Chen, Han-Dong, Wu, Congjun, Zhang, Shou-Cheng
By numerically solving models with competing superconducting and antiferromagnetic orders, we study the magnetic field dependence of the antiferromagnetic moment in both the weak and strong field...
Non-abelian Berry's phase and Chern numbers in higher spin pairing condensates (2003)
Chern, Chyh-Hong, Chen, Han-Dong, Wu, Congjun, Hu, Jiang-Ping, Zhang, Shou-Cheng
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 is characterized...
Geometry of the 3-Qubit State, Entanglement and Division Algebras (2003)
Bernevig, Bogdan A., Chen, Han-Dong
We present a generalization to 3-qubits of the standard Bloch sphere representation for a single qubit and of the 7-dimensional sphere representation for 2 qubits presented in Mosseri {\it et...
Vortex configurations of bosons in an optical lattice (2002)
Wu, Congjun, Chen, Han-dong, Hu, Jiang-ping, Zhang, Shou-Cheng
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 transition, the...
Antiferromagnetism and hole pair checkerboard in the vortex state of high Tc superconductors (2002)
Chen, Han-Dong, Hu, Jiang-Ping, Capponi, Sylvain, Arrigoni, Enrico, Zhang, Shou-Cheng
We propose a microscopic state for the vortex phase of BSCO superconductors. Around the vortex core or above H_{c2}, the d wave hole pairs form a checkerboard localized in the commensurate...
Antiferromagnetism and Hole Pair Checkerboard in the Vortex State of High Tc Superconductors (2002)
Chen, Han-Dong, Hu, Jian-Ping, Capponi, Sylvain, Arrigoni, Enrico, Zhang, Shou-Cheng
We propose a microscopic state for the vortex phase of BSCO superconductors. Around the vortex core or above Hc2, the d wave hole pairs form a checkerboard localized in the antiferromagnetic...
Antiferromagnetism and Hole Pair Checkerboard in the Vortex State of High Tc Superconductors (2002)
Chen, Han-Dong, Hu, Jian-Ping, Capponi, Sylvain, Arrigoni, Enrico, Zhang, Shou-Cheng
We propose a microscopic state for the vortex phase of BSCO superconductors. Around the vortex core or above Hc2, the d wave hole pairs form a checkerboard localized in the antiferromagnetic...