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- Yulin Chen, James G. Analytis, +11 authors Z. X. Shen
- Science
- 2009

Three-dimensional topological insulators are a new state of quantum matter with a bulk gap and odd number of relativistic Dirac fermions on the surface. By investigating the surface state of Bi2Te3… (More)

- Yulin Chen, J-H Chu, +13 authors Z. X. Shen
- Science
- 2010

In addition to a bulk energy gap, topological insulators accommodate a conducting, linearly dispersed Dirac surface state. This state is predicted to become massive if time reversal symmetry is… (More)

- Zhanybek Alpichshev, James G. Analytis, +5 authors Aharon Kapitulnik
- Physical review letters
- 2010

Scanning tunneling spectroscopy studies on high-quality Bi2Te3 crystals exhibit perfect correspondence to angle-resolved photoemission spectroscopy data, hence enabling identification of different… (More)

- Jonathan A Sobota, S-L Yang, +6 authors Zhi-Xun Shen
- Physical review letters
- 2014

We report time- and angle-resolved photoemission spectroscopy measurements on the topological insulator Bi(2)Se(3). We observe oscillatory modulations of the electronic structure of both the bulk and… (More)

- Lan Luan, Thomas M. Lippman, +6 authors Kathryn Ann Moler
- Physical review letters
- 2011

We measure the penetration depth λab(T) in Ba(Fe(1-x)Co(x))(2)As(2) using local techniques that do not average over the sample. The superfluid density ρs(T) ≡ 1/λab(T)2 has three main features.… (More)

- Jiun-Haw Chu, James G. Analytis, +4 authors Ian R Fisher
- Science
- 2010

High-temperature superconductivity often emerges in the proximity of a symmetry-breaking ground state. For superconducting iron arsenides, in addition to the antiferromagnetic ground state, a small… (More)

- Yoshitaka Matsushita, H. Bluhm, Theodore H. Geballe, Ian R Fisher
- Physical review letters
- 2005

We report results of low-temperature thermodynamic and transport measurements of Pb1-xTlxTe single crystals for Tl concentrations up to the solubility limit of approximately x=1.5%. For all doped… (More)

- Desheng Kong, Yulin Chen, +11 authors Dingchang Lin
- Nature nanotechnology
- 2011

Topological insulators exhibit a bulk energy gap and spin-polarized surface states that lead to unique electronic properties, with potential applications in spintronics and quantum information… (More)

- Jonathan A Sobota, S. L. Yang, +4 authors Zhi-Xun Shen
- Physical review letters
- 2012

Using femtosecond time- and angle-resolved photoemission spectroscopy, we investigated the nonequilibrium dynamics of the topological insulator Bi2Se3. We studied p-type Bi2Se3, in which the metallic… (More)

- Jonathan A Sobota, S-L Yang, +9 authors Zhi-Xun Shen
- Physical review letters
- 2013

We characterize the occupied and unoccupied electronic structure of the topological insulator Bi2Se3 by one-photon and two-photon angle-resolved photoemission spectroscopy and slab band structure… (More)