The quantum Hall effect (QHE) is one of the most notable discoveries in condensed matter physics, opening the door to topological physics. Extending QHE into three dimensions is an inspiring but challenging endeavor. This ...
Condensed Matter
Jul 11, 2024
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41
Researchers have long wondered whether light can be efficiently converted into electricity. Realistic and efficient methods to generate electricity from light, photocurrent, has numerous potential applications in the clean ...
Condensed Matter
Apr 16, 2024
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132
In work published in npj Quantum Materials, a team led by Prof. Leonardo Degiorgi in the Department of Physics at ETH Zurich has studied the broadband charge dynamics (i.e., longitudinal optical conductivity) of the ferromagnetic ...
Quantum Physics
Nov 7, 2022
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29
Topological semimetals are one of the major discoveries in condensed-matter physics in recent years. The magnetic Weyl semimetal, in which the Weyl nodes can be generated and modulated by magnetization, provides an ideal ...
Quantum Physics
Jun 24, 2021
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3
A new topological invariant χ is defined in systems with S4 symmetry to diagnose the existence of Weyl fermions. By calculating χ, the computational cost for searching Weyl semimetals is greatly reduced. Recently, Gao et ...
Soft Matter
Feb 24, 2021
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5
The thermoelectric conversion efficiency of a particular material is determined by the value of its thermoelectric figure of merit zT. It is a complex function of the absolute temperature and several pertinent transport properties ...
Materials Science
Jan 3, 2020
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9
Detection in multiple infrared (IR) regions spanning from short- and mid- to long-wave IR plays an important role in diverse fields from scientific research to wide-ranging technological applications, including target identification, ...
Optics & Photonics
Jan 5, 2023
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21
Weyl semimetals are topological materials whose low-energy excitations obey the Weyl equation. In a Weyl semimetal, the conduction and valence bands touch at discrete points in momentum space called Weyl nodes. Weyl nodes ...
Quantum Physics
Jan 5, 2023
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58
Dirac semimetals are critical states of topologically distinct phases. Such gapless topological states have been accomplished by a band-inversion mechanism, in which the Dirac points can be annihilated pairwise by perturbations ...
Optics & Photonics
Mar 20, 2020
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279
Topological superconductors, with bulk superconducting gap and Majorana fermion states on the surface or edge, are one of the most sought after quantum materials. Topological superconductivity is of fundamental importance ...
Superconductivity
Feb 25, 2020
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5
