Critical Couplings in Crystalline Color Superconductivity

Hong, Deog Ki; Sohn, Young Jin

doi:10.3938/jkps.50.1215

Cited by 2 publications

(11 citation statements)

References 13 publications

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“…1, [37][38][39][40][41][42][43] The opposite sign for the XMCD signals of the hysteresis loops for V and Co in Fig. 1 provide direct evidence for the opposite magnetization of the V and Co thin layers, also in agreement with published results.…”

Section: Element-specific Xmcd Hysteresis Loopssupporting

confidence: 79%

“…The experimental results have been partially reproduced by recent theoretical approaches developed by Carrillo-Cázares et al 1,[38][39][40] and Jisang Hong. [41][42][43] All these theoretical results confirmed a strong polarization of the V atoms in contact with Co and the antiparallel alignment of the magnetization in V and Co layers. Carrillo-Cázares et al 1,[38][39][40] have performed a number of theoretical calculations in order to simulate the V / Co and Co/ V interfaces and VCo alloys and to extract the atomic magnetic moments of Co and V atoms in these systems.…”

Section: Introductionsupporting

confidence: 69%

“…Below we expose the results of such studies, presenting the element-specific hysteresis loops of Co and V, as well as studies of the trend in Co and V atomic magnetic moments as a function of V atomic volume and the V and Co thicknesses. Since recent theoretical results 40,43 have suggested the formation of VCo alloy at the Co/ V interface, we also discuss this issue in the light of XAS and XMCD results together with published crystallographic results. …”

Section: Resultsmentioning

confidence: 99%

“…1,38-40 and Jisang Hong [41][42][43] have highlighted the strong interface character of the V magnetic polarization. In particular, these authors have predicted a very low ͑nearly zero͒ averaged magnetic moment of the V atoms in thick V layers ͑Ͼ1 ML thick͒ due to the predicted high magnetic moment of the V atoms in the V layer in contact with the Co layers and the rapidly vanishing V atomic magnetic moment for the other V layers.…”

Section: Atomic Magnetic Moments: Effect Of V and Co Thicknessesmentioning

confidence: 99%

“…40 They also performed calculations for n monolayer ͑ML͒ Co/ VCo alloy/ V / Cu͑001͒ systems ͑n =1, 2, 3, and 4͒ in order to simulate the formation of VCo alloy at the Co/ V interface 40 and found magnetic moments ͑averaged over the slabs 44 ͒ of −0.2 B and 1.48 B for V and Co, respectively, in 4 ML Co/ VCo alloy/ V / Cu͑001͒. Jisang Hong [41][42][43] found a strong decrease of the Co magnetic moment upon adsorption of V atoms on the Co͑100͒ face centered cubic ͑fcc͒ surface. The highest magnetic moment of the V atoms ͑−1.94 B ͒ was obtained for 0.5 ML V coverage, while for a surface alloy a magnetic moment of the V atoms of ͑−1.19 B ͒ was deduced.…”

Section: Introductionmentioning

confidence: 99%

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Interface effects, magnetic, and magneto-optical properties ofAl∕Co∕V∕MgO(100)structures

Huttel

Clavero²,

Laan

et al. 2008

Phys. Rev. B

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The magnetic and magneto-optical properties of Al/ Co/ V / MgO͑100͒ structures and the influence of the Co/ V interface for different thicknesses of the Co and V layers have been studied experimentally. From the element-specific hysteresis loops obtained by x-ray magnetic circular dichroism ͑XMCD͒ at the Co and V L 3 edges we find that the V layers are magnetically polarized antiparallel to the Co layers and that magnetization reversal occurs at the same magnetic field in both layers. The effect of the V atomic volume and the relative thicknesses of V and Co layers on the magnetic moments of the V and Co atoms are also studied. Contrary to what might be expected, the atomic magnetic moments of the V and Co atoms do not depend on the V atomic volume, however they depend strongly on the thicknesses of the V and Co layers. From the trend in the Co and V atomic magnetic moments as a function of Co and V thicknesses and the absence of any spectroscopic evidence for the formation of a VCo alloy, a long-range spin polarization of the V atoms is proposed. The extracted magneto-optical ͑MO͒ constants of V and Co as a function of photon energy clearly evidence a large amount of polarization in the V films in agreement with the XMCD results, which is indicative of the magnetic coupling between Co and V. The experimental MO results and simulations also show the strong influence of these polarized V layers in the MO properties of the complete system. These results, given the absence of spectroscopic evidence for the formation of a VCo alloy, support a long-range magnetization of the V atoms and a reduction of the Co atomic magnetic moments.

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Section: Element-specific Xmcd Hysteresis Loopssupporting

confidence: 79%

Section: Introductionsupporting

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Section: Atomic Magnetic Moments: Effect Of V and Co Thicknessesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Interface effects, magnetic, and magneto-optical properties ofAl∕Co∕V∕MgO(100)structures

Huttel

Clavero²,

Laan

et al. 2008

Phys. Rev. B

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Analysis of Low-Energy Pion Spectra

Choi¹,

Lee²

2008

J. Korean Phy. Soc.

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The transverse mass spectra and the rapidity distributions of π + and π − in Au-Au collisions at 2, 4, 6, and 8 GeV·A by E895 collaboration are fitted using an elliptically expanding fireball model with the contribution from the resonance decays and the final state Coulomb interaction. The ratio of the total number of produced π − and π + is used to fit the data. The resulting freeze-out temperature is rather low(T f < 60 MeV) with large transverse flow and thus resonance contribution is very small. The difference in the shape of mt spectra of the oppositely charged pions are found to be due to the Coulomb interaction of the pions.PACS numbers: 24.10. Pa, Pion production just above the threshold energy is quite different from that at very high energies such as RHIC energy since the ratio of π − to π + at very high energies is one which is not the case at low energies. At just above the threshold energy, pions are produced through the production of ∆ resonances and counting all the possible channels of ∆ decay the difference in the composition of isospins in the colliding nuclei appears as the difference in the numbers of the two oppositely charged pions [1,2,3], whereas at high energies many channels producing pions are open and small asymmetry in the initial isospin does not matter.Other features of the pion spectra at low energies are [1,2,3,4,5,6,7]: (1)The transverse momentum spectra both of the π − and π + seem to have two temperatures. Usually the low temperature component in the low momentum region is attributed to the pions decayed from resonances, especially the delta resonance, while the higher temperature component in the mid-momentum region is the thermal ones. (2) Transverse momentum spectra of π − and π + at very small momentum are different in the sense that the π + spectra is convex in its shape while the π − spectra does not show this behavoir. This difference in low momentum region is due to the Coulomb effect. The hadronic matter formed during the collision has charge which comes from the initially colliding two nuclei and thus the thermal pions escaping from the system experience the Coulomb interaction. The Coulomb interaction of π − may bend the spectrum in the low momentum region upward and thus it is hard to disentangle the contribution from the delta resonance and the Coulomb interaction in the low momentum region. (3) Width of the rapidity spectra of π − and π + are much wider than those from the isotropically expanding thermal model. The wide width may either come from partly transparent nature of the collision dynamics or the ellipsoidal expansion geometry. In order to fit large rapidity width using expanding fireball model one usually needs large longitudinal expansion velocity. * kslee@chonnam.ac.kr Even though all those features mentioned above are not new, calculations with all those features put in together comparing each contributions in detail is hard to find. There are claims that the properties of ∆ resonance are modified inside the hadronic matter formed even at this low ener...

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Critical Couplings in Crystalline Color Superconductivity

Cited by 2 publications

References 13 publications

Interface effects, magnetic, and magneto-optical properties ofAl∕Co∕V∕MgO(100)structures

Interface effects, magnetic, and magneto-optical properties ofAl∕Co∕V∕MgO(100)structures

Analysis of Low-Energy Pion Spectra

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