منابع مشابه
Ground-state structures of atomic metallic hydrogen.
Ab initio random structure searching using density functional theory is used to determine the ground-state structures of atomic metallic hydrogen from 500 GPa to 5 TPa. Including proton zero-point motion within the harmonic approximation, we estimate that molecular hydrogen dissociates into a monatomic body-centered tetragonal structure near 500 GPa (r(s)=1.23) that remains stable to 1 TPa (r(s...
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Recently emerging two-dimensional (2D) superconductors in atomically thin layers and at heterogeneous interfaces are attracting growing interest in condensed matter physics. Here, we report that an ion-gated zirconium nitride chloride surface, exhibiting a dome-shaped phase diagram with a maximum critical temperature of 14.8 kelvin, behaves as a superconductor persisting to the 2D limit. The su...
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Milind N. Kunchur,1,* B. I. Ivlev,2 D. K. Christen,3 and J. M. Phillips4 1Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208 2Instituto de Física, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico 3Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 4Sandia National Laboratory, M S 1411, Albuquerque, New M...
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We investigated break junctions of the Kondo semiconductor CeNiSn, both in the metallic and in the tunnelling regime, at low temperatures and in magnetic fields up to 8T. Our experiments demonstrate that direct CeNiSn junctions have typical metallic properties instead of the expected semiconducting ones. There is no clear-cut evidence for an energy (pseudo)gap. The main spectral feature, a pron...
متن کاملGround State EntanglementEnergetics
We consider the ground state of simple quantum systems coupled to an environment. In general the system is entangled with its environment. As a consequence, even at zero temperature, the energy of the system is not sharp: a projective measurement can find the system in an excited state. We show that energy fluctuation measurements at zero temperature provide entanglement information. For two-st...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1999
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.59.2599