Nature Search

Weak Antilocalization and Anisotropic Magnetoresistance as a Probe of Surface States in Topological Bi₂Te_xSe_3−x Thin Films

Gregory M. Stephen
Owen. A. Vail
Adam L. Friedman
ResearchOpen Access16 Mar 2020
Scientific Reports

Volume: 10, P: 1-7
Ferromagnetic particles as magnetic resonance imaging temperature sensors

Magnetic resonance imaging can distinguish between different tissue types by measuring the proton distribution in a living sample. Here, the authors demonstrate how this technique can be extended to provide temperature information by using ferromagnetic particles with temperature-dependent magnetization.

J. H. Hankiewicz
Z. Celinski
R. E. Camley
ResearchOpen Access09 Aug 2016
Nature Communications

Volume: 7, P: 1-8
Single valley Dirac fermions in zero-gap HgTe quantum wells

Most of the notable properties of graphene are a result of the cone-like nature of the points in its electronic structure where its conduction and valance bands meet. Similar structures arise in 2D HgTe quantum wells, but without the spin- and valley-degeneracy of graphene; their properties are also likely to be easier to control.

B. Büttner
C. X. Liu
L. W. Molenkamp
Research06 Feb 2011
Nature Physics

Volume: 7, P: 418-422
Evidence for the ballistic intrinsic spin Hall effect in HgTe nanostructures

Non-local transport measurements on mercury telluride quantum wells show clear signatures of the ballistic spin Hall effect. The ballistic nature of the experiment allows the observed effect to be interpreted as a direct consequence of the band structure of these semiconductor nanostructures, rather that being caused by impurity scattering.

C. Brüne
A. Roth
L. W. Molenkamp
Research02 May 2010
Nature Physics

Volume: 6, P: 448-454
Spin polarization of the quantum spin Hall edge states

The quantum spin Hall state is predicted to consist of two oppositely polarized spin currents travelling in opposite directions around the edges of a topological insulator. Non-local measurements of the transport in HgTe quantum wells confirm the polarized nature of these edge states.

Christoph Brüne
Andreas Roth
Shou-Cheng Zhang
Research27 May 2012
Nature Physics

Volume: 8, P: 485-490
Observation of the universal magnetoelectric effect in a 3D topological insulator

The electrodynamics of topological insulators has been predicted to show a new magnetoelectric term, but this hasn’t been observed. Here, Dziomet al. observe a universal Faraday rotation angle equal to the fine structure constant, evidencing the so-called topological magnetoelectric effect.

V. Dziom
A. Shuvaev
L. W. Molenkamp
ResearchOpen Access15 May 2017
Nature Communications

Volume: 8, P: 1-8
Effective lifting of the topological protection of quantum spin Hall edge states by edge coupling

New functionalities of two-dimensional topological insulators (2DTI) are of current scientific interest. Here, the authors show that topological protection can be lifted by pairwise coupling of 2DTI bismuthene edges in close proximity.

R. Stühler
A. Kowalewski
R. Claessen
ResearchOpen Access16 Jun 2022
Nature Communications

Volume: 13, P: 1-7
4π-periodic Josephson supercurrent in HgTe-based topological Josephson junctions

A material weakly linking two superconductors may itself exhibit superconductivity whilst its material properties strongly influence the nature of the supercurrent. Here, the authors identify a supercurrent with p-wave symmetry in such a Josephson junction made of topologically non-trivial material.

J. Wiedenmann
E. Bocquillon
L. W. Molenkamp
ResearchOpen Access21 Jan 2016
Nature Communications

Volume: 7, P: 1-7
Double-pulse speckle contrast correlations with near Fourier transform limited free-electron laser light using hard X-ray split-and-delay

Wojciech Roseker
Sooheyong Lee
Gerhard Grübel
ResearchOpen Access19 Mar 2020
Scientific Reports

Volume: 10, P: 1-9

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