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- Andreas Roth, Christoph Brüne, +4 authors Shou-Cheng Zhang
- Science
- 2009

Nonlocal transport through edge channels holds great promise for low-power information processing. However, edge channels have so far only been demonstrated to occur in the quantum Hall regime, at high magnetic fields. We found that mercury telluride quantum wells in the quantum spin Hall regime exhibit nonlocal edge channel transport at zero external… (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 response and renormalization group methods, we calculate the edge conductance of a QSH insulator as a function of temperature in the presence of a magnetic… (More)

- Joseph Maciejko, Xiao-Liang Qi, H Dennis Drew, Shou-Cheng Zhang
- Physical review letters
- 2010

Fundamental topological phenomena in condensed matter physics are associated with a quantized electromagnetic response in units of fundamental constants. Recently, it has been predicted theoretically that the time-reversal invariant topological insulator in three dimensions exhibits a topological magnetoelectric effect quantized in units of the fine… (More)

- Joseph Maciejko, Victor Chua, Gregory A Fiete
- Physical review letters
- 2014

Motivated by experimental progress in the growth of heavy transition metal oxides, we theoretically study a class of lattice models of interacting fermions with strong spin-orbit coupling. Focusing on interactions of intermediate strength, we derive a low-energy effective field theory for a fully gapped, topologically ordered, fractionalized state with an… (More)

- Joseph Maciejko, Xiao-Liang Qi, Andreas Karch, Shou-Cheng Zhang
- Physical review letters
- 2010

Topological insulators can be generally defined by a topological field theory with an axion angle θ of 0 or π. In this work, we introduce the concept of fractional topological insulator defined by a fractional axion angle and show that it can be consistent with time reversal T invariance if ground state degeneracies are present. The fractional axion angle… (More)

- Joseph Maciejko
- 2007

We consider first the Lorentz group O(1, 3) with infinitesimal generators J µν and the associated Lie algebra given by [J µν , J ρσ ] = i(g νρ J µσ − g µρ J νσ − g νσ J µρ + g µσ J νρ) (1) In quantum field theory, we actually consider a subgroup of O(1, 3), the proper orthochronous or restricted Lorentz group SO + (1, 3) = {Λ ∈ O(1, 3)| det Λ = 1 and Λ 0 0… (More)

- William Witczak-Krempa, Joseph Maciejko
- Physical review letters
- 2016

This corrects the article DOI: 10.1103/PhysRevLett.116.100402.

- Andreas Roth, Christoph Brüne, +4 authors Shou-Cheng Zhang
- 2009

We present direct experimental evidence for nonlocal transport in HgTe quantum wells in the quantum spin Hall regime, in the absence of any external magnetic field. The data conclusively show that the non-dissipative quantum transport occurs through edge channels, while the contacts lead to equilibra-tion between the counter-propagating spin states at the… (More)

- Cheng-Chien Chen, Lukas Muechler, Roberto Car, Titus Neupert, Joseph Maciejko
- Physical review letters
- 2016

We study the two-dimensional (2D) Hubbard model using exact diagonalization for spin-1/2 fermions on the triangular and honeycomb lattices decorated with a single hexagon per site. In certain parameter ranges, the Hubbard model maps to a quantum compass model on those lattices. On the triangular lattice, the compass model exhibits collinear stripe… (More)

- Joseph Maciejko
- 2007