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Quantum crystal structure in the 250-kelvin superconducting lanthanum hydride
Quantum atomic fluctuations have a crucial role in stabilizing the crystal structure of the high-pressure superconducting phase of lanthanum hydride.
- Ion Errea
- , Francesco Belli
- & José A. Flores-Livas
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Article |
Catalogue of topological electronic materials
Topological materials are thought to be scarce, but an algorithm that diagnoses nontrivial topology in nonmagnetic materials finds the opposite: more than 30 per cent of the 26,688 materials studied are topological.
- Tiantian Zhang
- , Yi Jiang
- & Chen Fang
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Letter |
Bright triplet excitons in caesium lead halide perovskites
The lowest-energy exciton state in caesium lead halide perovskite nanocrystals is shown to be a bright triplet state, contrary to expectations that lowest-energy excitons should always be dark.
- Michael A. Becker
- , Roman Vaxenburg
- & Alexander L. Efros
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Letter |
Quantum hydrogen-bond symmetrization in the superconducting hydrogen sulfide system
Ab initio calculations are used to determine the contribution of quantum fluctuations to the crystal structure of the high-pressure superconducting phase of H3S and D3S; the quantum nature of the proton is found to fundamentally change the superconducting phase diagram of H3S.
- Ion Errea
- , Matteo Calandra
- & Francesco Mauri
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Letter |
Unexpected strain-stiffening in crystalline solids
Quantum mechanical calculations reveal a surprising strain-stiffening phenomenon in two crystalline solids, one of which is cementite, a precipitate found in carbon steels.
- Chao Jiang
- & Srivilliputhur G. Srinivasan
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Article |
Towards an exact description of electronic wavefunctions in real solids
Recent developments that reduce the computational cost and scaling of wavefunction-based quantum-chemical techniques open the way to the successful application of such techniques to a variety of real-world solids.
- George H. Booth
- , Andreas Grüneis
- & Ali Alavi
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Letter |
Two-dimensional electron gas with universal subbands at the surface of SrTiO3
An exotic two-dimensional electron gas (2DEG) forms at oxide interfaces based on SrTiO3, but the precise nature of the 2DEG has remained elusive. In a systematic study using angle-resolved photoemission spectroscopy (ARPES), new insights into the electronic structure of the 2DEG are obtained. The findings shed light on previous observations in SrTiO3-based heterostructures and suggest that different forms of electron confinement at the surface of SrTiO3 lead to essentially the same 2DEG.
- A. F. Santander-Syro
- , O. Copie
- & M. J. Rozenberg