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Title: Chiral Topological Superconductors Enhanced by Long-Range Interactions

Authors:
; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1415881
Grant/Contract Number:
SC0010526
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 1; Related Information: CHORUS Timestamp: 2018-01-05 10:02:32; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Viyuela, Oscar, Fu, Liang, and Martin-Delgado, Miguel Angel. Chiral Topological Superconductors Enhanced by Long-Range Interactions. United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.120.017001.
Viyuela, Oscar, Fu, Liang, & Martin-Delgado, Miguel Angel. Chiral Topological Superconductors Enhanced by Long-Range Interactions. United States. doi:10.1103/PhysRevLett.120.017001.
Viyuela, Oscar, Fu, Liang, and Martin-Delgado, Miguel Angel. 2018. "Chiral Topological Superconductors Enhanced by Long-Range Interactions". United States. doi:10.1103/PhysRevLett.120.017001.
@article{osti_1415881,
title = {Chiral Topological Superconductors Enhanced by Long-Range Interactions},
author = {Viyuela, Oscar and Fu, Liang and Martin-Delgado, Miguel Angel},
abstractNote = {},
doi = {10.1103/PhysRevLett.120.017001},
journal = {Physical Review Letters},
number = 1,
volume = 120,
place = {United States},
year = 2018,
month = 1
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on January 5, 2019
Publisher's Accepted Manuscript

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  • Results of molecular quantum electrodynamics calculations of discriminatory interactions between two chiral molecules undergoing resonance energy transfer, van der Waals dispersion, and optical binding are presented. A characteristic feature of the theory is that the radiation field is quantized with signals consequently propagating between centres at the speed of light. In order to correctly describe optically active chromophores, it is necessary to include magnetic as well as electric dipole coupling terms in the time-dependent perturbation theory computations. Recent work investigating the effect of an absorptive and dispersive chiral medium on the rate of migration of energy will also be discussed.
  • This paper uses the self-consistent phase-phonon approximation to study the effect of long-range Coulomb interactions in a superconducting array. We find that crucial features of the results of mean-field theory are confirmed: long-range interactions enhance the superconducting state and lower the critical value of the grain diameter, below which superconductivity is impossible. However, the reentrant phase transition found in the mean-field solution is absent from the self-consistent results. This may be because the self-consistent approximation is invalid when the superconducting state is suppressed and phase fluctuations are large, such as in the reentrant regime of the mean-field theory.
  • Here, we report that spatial (<1 nm) proximity between different molecules in solid bulk materials and, for the first time, different moieties on the surface of a catalyst, can be established without isotope enrichment by means of homonuclear CHHC solid-state nuclear magnetic resonance experiment. This 13C– 13C correlation measurement, which hitherto was not possible for natural-abundance solids, was enabled by the use of dynamic nuclear polarization. Importantly, it allows the study of long-range correlations in a variety of materials with high resolution.
  • This paper examines the thermodynamic stability of chiral domain walls and vortices-topological defects which can exist in chiral superconductors. Using London theory it is demonstrated that at sufficiently small applied and chiral fields the existence of domain walls and vortices in the sample is not favored and the sample's configuration is a single domain. The particular chirality of the single-domain configuration is neither favored nor disfavored by the applied field. Increasing the field leads to an entry of a domain-wall loop or a vortex into the sample. The formation of a straight domain wall is never preferred in equilibrium. Valuesmore » of the entry (critical) fields for both types of defects, as well as the equilibrium size of the domain-wall loop, are calculated. We also consider a mesoscopic chiral sample and calculate its zero-field magnetization, susceptibility, and a change in the magnetic moment due to a vortex or a domain-wall entry. We show that in the case of a soft domain wall whose energetics is dominated by the chiral current (and not by the surface tension) its behavior in mesoscopic samples is substantially different from that in the bulk case and can be used for a controllable transfer of edge excitations. The applicability of these results to Sr{sub 2}RuO{sub 4} - a tentative chiral superconductor - is discussed.« less