Taylor L. Hughes

Learn More
We show that the quantum spin Hall (QSH) effect, a state of matter with topological properties distinct from those of conventional insulators, can be realized in mercury telluride-cadmium telluride semiconductor quantum wells. When the thickness of the quantum well is varied, the electronic state changes from a normal to an "inverted" type at a critical(More)
A review of the literature on the prevalence of alcohol use and problems among lesbians reveals that the few studies yielding information on this population are beset by design and methodological problems. Those factors possibly associated with higher risk status of lesbians are identified, as are gaps in the literature, and implications for clinical(More)
The search for topologically non-trivial states of matter has become an important goal for condensed matter physics. Recently, a new class of topological insulators has been proposed. These topological insula-tors have an insulating gap in the bulk, but have topologically protected edge states due to the time reversal symmetry. In two dimensions the helical(More)
Studies focusing on mental health service use have consistently viewed African American women as a homogeneous population, and very few studies have examined subgroup differences. However, important differences exist both within and between groups in lifestyle, stressors, type and availability of support resources, societal interactions, and risk-taking(More)
We generalize the topological entanglement entropy to a family of topological Rényi entropies parametrized by a parameter alpha, in an attempt to find new invariants for distinguishing topologically ordered phases. We show that, surprisingly, all topological Rényi entropies are the same, independent of alpha for all nonchiral topological phases. This(More)
Ultracold and quantum degenerate gases held near conductive surfaces can serve as sensitive, high-resolution, and wide-area probes of electronic current flow. Previous work has imaged transport around grain boundaries in a gold wire by using ultracold and Bose-Einstein condensed atoms held microns from the surface with an atom-chip trap. We show that(More)
  • Citation Qian, J Liu, L Fu, Xiaofeng Qian, Junwei Liu, Liang Fu +33 others
  • 2014
The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. We predict a new class of large-gap quantum spin Hall insulators in two-dimensional transition metal dichalcogenides with 1T' structure, namely, 1T'-MX 2 with M=(Mo, W) and X=(S, Se, and Te) by first-principles calculations. The structural(More)
Practitioners in acute and primary care settings often fail to identify and intervene with chemically dependent patients. Counterproductive attitudes, lack of knowledge, and poor clinical skills impede early identification, treatment, and referral. In response to these problems, an educational intervention was designed to improve practicing nurses'(More)
We explore a spin Josephson effect in a system of two ferromagnets coupled by a tunnel junction formed of 2D time-reversal invariant topological insulators. In analogy with the more commonly studied instance of the Josephson effect for charge in superconductors, we investigate properties of the phase-coherent spin current resulting from the misalignment of(More)
Three-dimensional (3D) topological-insulator–s-wave-superconductor heterostructures have been predicted as candidate systems for the observation of Majorana fermions in the presence of superconducting vortices. In these systems, Majorana fermions are expected to form at the interface between the topological insulator and the superconductor while the bulk(More)