FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2912654849> ?p ?o ?g. }

• W2912654849 abstract "We analyze the evolution of the dynamics of a neutral s-wave superconductor between BCS and BEC regimes. We consider 2d case, when BCS-BEC crossover occurs already at weak coupling as a function of the ratio of the two scales -- the Fermi energy $E_F$ and the bound state energy for two fermions in a vacuum, $E_0$. BCS and BEC limits correspond to $E_F gg E_0$ and $E_F ll E_0$, respectively. The chemical potential $mu = E_F-E_0$ changes the sign between the two regimes. We develop an approach to derive the leading terms in the expansion of the effective action in the spatial and time derivative of the slowly varying superconducting order parameter $Delta (r, tau)$, and express the action in terms of derivatives of the phase $phi (r,tau)$ of $Delta (r, tau) = Delta e^{iphi (r, tau)}$. In the long wavelength limit the second gradients $(nabla phi)^2$ and ${dot phi}^2$, describe Bogoliubov-Anderson mode, which, as we find, does not change through BCS-BEC crossover. The effective action also contains first order gradient term, $i pi A {dot phi}$, which is meaningful only if $phi$ contains topological defects, such as vortices. We apply our approach to evaluate coefficient $A$ for a moving vortex. We find that $A_{vort}$ has two contributions, $A_{vort}= A_{vort,1} - A_{vort,2}$. One comes from the states away from the vortex core and has $A_{vort,1} = n/2$, where $n$ is the fermion density. The other comes from electronic states inside the vortex core and has $A_{vort,2} = -n_0/2$, where $n_0$ is the fermion density at the vortex core. We interpret this term as the reaction force of normal electrons to the vortex displacement in the limit when the spacing between energy levels is set to zero. The difference $(n-n_0)/2$ changes through the BEC-BCS crossover as $n_0$ nearly compensates $n$ in the BCS regime, but vanishes in the BEC regime." @default.
• W2912654849 created "2019-02-21" @default.
• W2912654849 creator A5044283050 @default.
• W2912654849 creator A5078429551 @default.
• W2912654849 date "2019-05-17" @default.
• W2912654849 modified "2023-10-18" @default.
• W2912654849 title "Dynamic properties of superconductors: Anderson-Bogoliubov mode and Berry phase in the BCS and BEC regimes" @default.
• W2912654849 cites W1519157372 @default.
• W2912654849 cites W1587209806 @default.
• W2912654849 cites W1602301868 @default.
• W2912654849 cites W1791516033 @default.
• W2912654849 cites W1970858904 @default.
• W2912654849 cites W1978145798 @default.
• W2912654849 cites W1978434431 @default.
• W2912654849 cites W1978623490 @default.
• W2912654849 cites W1981468506 @default.
• W2912654849 cites W1986692601 @default.
• W2912654849 cites W1998736023 @default.
• W2912654849 cites W2002175779 @default.
• W2912654849 cites W2009956201 @default.
• W2912654849 cites W2013372244 @default.
• W2912654849 cites W2018960958 @default.
• W2912654849 cites W2029513492 @default.
• W2912654849 cites W2029536527 @default.
• W2912654849 cites W2035698540 @default.
• W2912654849 cites W2035844418 @default.
• W2912654849 cites W2036465433 @default.
• W2912654849 cites W2040393204 @default.
• W2912654849 cites W2041732803 @default.
• W2912654849 cites W2048349864 @default.
• W2912654849 cites W2054766544 @default.
• W2912654849 cites W2057548971 @default.
• W2912654849 cites W2057640563 @default.
• W2912654849 cites W2058590137 @default.
• W2912654849 cites W2063496234 @default.
• W2912654849 cites W2063686224 @default.
• W2912654849 cites W2064184429 @default.
• W2912654849 cites W2064219363 @default.
• W2912654849 cites W2066337524 @default.
• W2912654849 cites W2068563972 @default.
• W2912654849 cites W2068681450 @default.
• W2912654849 cites W2069889729 @default.
• W2912654849 cites W2070562221 @default.
• W2912654849 cites W2071719789 @default.
• W2912654849 cites W2074427853 @default.
• W2912654849 cites W2080935262 @default.
• W2912654849 cites W2089346742 @default.
• W2912654849 cites W2091328615 @default.
• W2912654849 cites W2094184081 @default.
• W2912654849 cites W2095046890 @default.
• W2912654849 cites W2116243867 @default.
• W2912654849 cites W2117862525 @default.
• W2912654849 cites W2126204326 @default.
• W2912654849 cites W2133238831 @default.
• W2912654849 cites W2133967181 @default.
• W2912654849 cites W2149117519 @default.
• W2912654849 cites W2228264683 @default.
• W2912654849 cites W2247130791 @default.
• W2912654849 cites W2270390351 @default.
• W2912654849 cites W2311489405 @default.
• W2912654849 cites W2605658901 @default.
• W2912654849 cites W2808621531 @default.
• W2912654849 cites W3092507256 @default.
• W2912654849 cites W3098739545 @default.
• W2912654849 cites W3099356689 @default.
• W2912654849 cites W3101456737 @default.
• W2912654849 cites W3101830463 @default.
• W2912654849 cites W3102475886 @default.
• W2912654849 cites W3102639744 @default.
• W2912654849 cites W3102893366 @default.
• W2912654849 cites W3105031902 @default.
• W2912654849 cites W925943528 @default.
• W2912654849 doi "https://doi.org/10.1103/physrevb.99.174510" @default.
• W2912654849 hasPublicationYear "2019" @default.
• W2912654849 type Work @default.
• W2912654849 sameAs 2912654849 @default.
• W2912654849 citedByCount "2" @default.
• W2912654849 countsByYear W29126548492021 @default.
• W2912654849 countsByYear W29126548492023 @default.
• W2912654849 crossrefType "journal-article" @default.
• W2912654849 hasAuthorship W2912654849A5044283050 @default.
• W2912654849 hasAuthorship W2912654849A5078429551 @default.
• W2912654849 hasBestOaLocation W29126548491 @default.
• W2912654849 hasConcept C10138342 @default.
• W2912654849 hasConcept C121282732 @default.
• W2912654849 hasConcept C121332964 @default.
• W2912654849 hasConcept C127413603 @default.
• W2912654849 hasConcept C131584629 @default.
• W2912654849 hasConcept C140820882 @default.
• W2912654849 hasConcept C14103023 @default.
• W2912654849 hasConcept C162324750 @default.
• W2912654849 hasConcept C174084160 @default.
• W2912654849 hasConcept C182306322 @default.
• W2912654849 hasConcept C26873012 @default.
• W2912654849 hasConcept C2779557605 @default.
• W2912654849 hasConcept C44280652 @default.
• W2912654849 hasConcept C52233224 @default.
• W2912654849 hasConcept C54101563 @default.
• W2912654849 hasConcept C54207081 @default.
• W2912654849 hasConcept C62520636 @default.

• next