Interplay of the pseudogap and the BCS gap for heteropairs in K-40-Li-6 mixture

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10404092" target="_blank" >RIV/00216208:11320/16:10404092 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=m36RB.Id6L" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=m36RB.Id6L</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1209/0295-5075/116/36003" target="_blank" >10.1209/0295-5075/116/36003</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Interplay of the pseudogap and the BCS gap for heteropairs in K-40-Li-6 mixture

Popis výsledku v původním jazyce

The description of heteropairs like K-40-Li-6 near and in the superconducting state requires a fully self-consistent theory (see Hanai R. and Ohashi Y., Phys. Rev. A, 90 (2014) 043622). We derive analytic pseudogap Green&apos;s functions for the &quot;normal&quot; and superconducting states from the Luttinger-Ward theory with the T-matrix in the static separable approximation. The self-consistency in the closing loop of self-energy has two pronounced effects on the singleparticle spectrum. First, the single-particle excitations decay before the asymptotic quasiparticle propagation is established, therefore the normal state is not a Fermi liquid. Second, the pseudogap has a V shape even for s-wave pairing. The V-shaped pseudogap and the U-shaped BCS gap interfere resulting in slope breaks of the gap walls and the in-gap states in the density of states. Various consequences of an incomplete self-consistency are demonstrated.

Název v anglickém jazyce

Interplay of the pseudogap and the BCS gap for heteropairs in K-40-Li-6 mixture

Popis výsledku anglicky

The description of heteropairs like K-40-Li-6 near and in the superconducting state requires a fully self-consistent theory (see Hanai R. and Ohashi Y., Phys. Rev. A, 90 (2014) 043622). We derive analytic pseudogap Green&apos;s functions for the &quot;normal&quot; and superconducting states from the Luttinger-Ward theory with the T-matrix in the static separable approximation. The self-consistency in the closing loop of self-energy has two pronounced effects on the singleparticle spectrum. First, the single-particle excitations decay before the asymptotic quasiparticle propagation is established, therefore the normal state is not a Fermi liquid. Second, the pseudogap has a V shape even for s-wave pairing. The V-shaped pseudogap and the U-shaped BCS gap interfere resulting in slope breaks of the gap walls and the in-gap states in the density of states. Various consequences of an incomplete self-consistency are demonstrated.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Europhysics Letters

ISSN

0295-5075

e-ISSN

—

Svazek periodika

116

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

5

Strana od-do

36003

Kód UT WoS článku

000392953800019

EID výsledku v databázi Scopus

2-s2.0-85007490373