Atomic and molecular defects in solid 4He

Moroshkin, Peter; Hofer, Adrian; Weis, A.

doi:10.1016/j.physrep.2008.06.004

Cited by 64 publications

(97 citation statements)

References 293 publications

(653 reference statements)

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“…This can be compared with the results of a calculation 5 utilizing CsÀHe pair potentials (described in Subsection 5.1) that gives a deformation of 3.5% and with the results of an analysis of the hyperfine spectra 16 that yielded a deformation of 3.5%.…”

Section: Discussionmentioning

confidence: 99%

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Spectroscopy of Nonspherical Atomic Bubbles in Solid Helium

2011

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We analyze the effect of the host crystal symmetry on the optical spectra of the 6P 1/2−6S 1/2 and 6P 3/2−6S 1/2 transitions of atomic Cs in solid 4He matrices. In particular, we address the deformation of the bubble structures formed by Cs in such quantum crystals. We show that the anisotropy of the stiffness tensor leads to static quadrupolar bubble shape deformations in hexagonally close-packed (hcp) crystals, while the corresponding deformations in the body-centered cubic (bcc) phase of the matrix have a hexadecupolar symmetry. A comparison of the measured excitation spectra with our model calculations allow us to infer quantitative values of the deformation parameters.

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Section: Discussionmentioning

confidence: 99%

“…5 We were unable to make the described procedure converge for the bcc crystal, presumably due to its very pronounced anisotropy ( Figure 11).…”

Section: Pair Potentials Approach In Deformation Modelingmentioning

confidence: 99%

Spectroscopy of Nonspherical Atomic Bubbles in Solid Helium

2011

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“…Although laser ablation (LA) of metals in liquid He is used in matrix-isolation spectroscopy since the 1990's [4][5][6][7][8], the ablation process is not well studied. In particular the formation of nanoparticles (NP) during the laser ablation of Cs and Rb in liquid helium was reported [4,9].…”

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Formation of Metallic Nanowires by Laser Ablation in Liquid Helium

et al. 2011

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Laser ablation of metals in liquid helium results in the formation of metal filaments with diameters on the order of 2-10 nanometres and of spherical nanoparticles. In superfluid helium these nanowires aggregate into centimeter-sized networks. We study the morphology and the electric conductivity of these large aggregates, as well as extinction spectra and the crystalline structure of the individual nanofragments. We discuss the effect of superfluidity on the mechanisms of coalescence processes at the nanometer and centimeter scales.

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“…16,32 . This allows to trap atoms leaving their energy states almost intact and to achieve long coherence times due to weak interaction with phonons.…”

Section: Magnetic Atom Impurities In Inert Matricesmentioning

confidence: 99%

“…Since the reactions of H 2 with magnetic rare-earth atoms are largely unexplored, in this work we focus on solid helium as a matrix that has been proven to be nonreactive. The helium matrix behaves as an amorphous solid close to a liquid, therefore the crystal fields and phonon coupling strengths are typically weak 32,34 . This motivated a number of studies of atomic impurities in He to measure the electron electric dipole moment and to do precision spectroscopy 32,34,35 .…”

Section: Magnetic Atom Impurities In Inert Matricesmentioning

confidence: 99%

Controllable quantum spin glasses with magnetic impurities embedded in quantum solids

et al. 2013

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Magnetic impurities embedded in inert solids can exhibit long coherence times and interact with one another via their intrinsic anisotropic dipolar interaction. We argue that, as a consequence of these properties, disordered ensembles of magnetic impurities provide an effective platform for realizing a controllable, tunable version of the dipolar quantum spin glass seen in LiHoxY1−xF4.Specifically, we propose and analyze a system composed of dysprosium atoms embedded in solid helium. We describe the phase diagram of the system and discuss the realizability and detectability of the quantum spin glass and antiglass phases.

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Atomic and molecular defects in solid 4He

Cited by 64 publications

References 293 publications

Spectroscopy of Nonspherical Atomic Bubbles in Solid Helium

Spectroscopy of Nonspherical Atomic Bubbles in Solid Helium

Formation of Metallic Nanowires by Laser Ablation in Liquid Helium

Controllable quantum spin glasses with magnetic impurities embedded in quantum solids

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