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- Can-Li Song, Yi-lin Wang, +12 authors Qi-Kun Xue
- Science
- 2011

We investigated the electron-pairing mechanism in an iron-based superconductor, iron selenide (FeSe), using scanning tunneling microscopy and spectroscopy. Tunneling conductance spectra of… (More)

- Congjun Wu, C Wu
- 2006

Optical traps and lattices provide a new opportunity to study strongly correlated high spin systems with cold atoms. In this article, we review the recent progress on the hidden symmetry properties… (More)

- Congjun Wu, Bogdan Andrei Bernevig, Shou-Cheng Zhang
- Physical review letters
- 2006

The edge states of the recently proposed quantum spin Hall systems constitute a new symmetry class of one-dimensional liquids dubbed the "helical liquid," where the spin orientation is determined by… (More)

- Joseph Maciejko, Chaoxing Liu, Yuval Oreg, Xiao-liang Qi, Congjun Wu, Shou-Cheng Zhang
- Physical review letters
- 2009

Following the recent observation of the quantum spin Hall (QSH) effect in HgTe quantum wells, an important issue is to understand the effect of impurities on transport in the QSH regime. Using linear… (More)

- Fred N. Buhler, P. Brown, +79 authors Yan Liu

- Congjun Wu
- Physical review letters
- 2008

We investigate the topological insulating states of the p-band systems in optical lattices induced by the on site orbital angular momentum polarization, which exhibit gapless edge modes in the… (More)

- Congjun Wu, Jiang-Ping Hu, Shou-Cheng Zhang
- Physical review letters
- 2003

The spin-3/2 fermion models with contact interactions have a generic SO5 symmetry without any fine-tuning of parameters. Its physical consequences are discussed in both the continuum and lattice… (More)

Quantum Monte Carlo sQMCd simulations involving fermions have a notorious sign problem. Some wellknown exceptions to the auxiliary field QMC algorithm rely on the factorizibility of the fermion… (More)

- Congjun Wu
- 2009

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 time-reversal symmetry… (More)

- Vladimir M. Stojanović, Congjun Wu, Weijiang Liu, Sankar Das Sarma
- Physical review letters
- 2008

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 lattice potential, we… (More)