http://www.cnr.it/ontology/cnr/individuo/prodotto/ID325112
Solid para-hydrogen as the paradigmatic quantum crystal: Three observables probed by ultrahigh-resolution neutron spectroscopy (Articolo in rivista)
- Type
- Label
- Solid para-hydrogen as the paradigmatic quantum crystal: Three observables probed by ultrahigh-resolution neutron spectroscopy (Articolo in rivista) (literal)
- Anno
- 2012-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1103/PhysRevB.86.144524 (literal)
- Alternative label
Fernandez-Alonso, Felix; Cabrillo, Carlos; Fernandez-Perea, Ricardo; Bermejo, Francisco J.; Gonzalez, Miguel A.; Mondelli, Claudia; Farhi, Emmanuel (2012)
Solid para-hydrogen as the paradigmatic quantum crystal: Three observables probed by ultrahigh-resolution neutron spectroscopy
in Physical review. B, Condensed matter and materials physics
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Fernandez-Alonso, Felix; Cabrillo, Carlos; Fernandez-Perea, Ricardo; Bermejo, Francisco J.; Gonzalez, Miguel A.; Mondelli, Claudia; Farhi, Emmanuel (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- STFC Rutherford Appleton Laboratory; Consejo Superior de Investigaciones Cientificas (CSIC); Consejo Superior de Investigaciones Cientificas (CSIC); Institute Laue Langevin; CNR-IOM, Institute Laue Langevin (literal)
- Titolo
- Solid para-hydrogen as the paradigmatic quantum crystal: Three observables probed by ultrahigh-resolution neutron spectroscopy (literal)
- Abstract
- Quantum crystals are characterized by zero-point-energy motions large enough to explore the details of the interaction potential beyond the harmonic approximation even at zero temperature. By making recourse to ultrahigh-resolution neutron spectroscopy, we have probed simultaneously three observables sensitive to anharmonic effects in solid para-H-2 over a wide temperature range, namely, Bragg scattering, molecular root-mean-square displacements, and the spectral linewidth of the J = 0 -> 1 rotational transition which, on average, amounts to a half-width at half-maximum of 1.8 +/- 0.2 mu eV. These three quantities show no measurable variation with temperature, thus signaling the existence of a fully expanded crystal across the entire solid phase. Our results provide unambiguous experimental evidence for the intrinsic quantum character of this fundamental molecular solid. (literal)
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