Evidence for precursor superconducting pairing above T-c in
underdoped cuprates from an analysis of the in-plane infrared
response

J 2015

Evidence for precursor superconducting pairing above T-c in underdoped cuprates from an analysis of the in-plane infrared response

ŠOPÍK, Břetislav, Jiří CHALOUPKA, Adam DUBROKA, Christian BERNHARD, Dominik MUNZAR et. al.

Základní údaje

Originální název

Evidence for precursor superconducting pairing above T-c in underdoped cuprates from an analysis of the in-plane infrared response

Autoři

ŠOPÍK, Břetislav (203 Česká republika, domácí), Jiří CHALOUPKA (203 Česká republika, domácí), Adam DUBROKA (203 Česká republika, domácí), Christian BERNHARD (276 Německo) a Dominik MUNZAR (203 Česká republika, garant, domácí)

Vydání

New Journal of Physics, Britosl (Velká Británie), IOP PUBLISHING LTD, 2015, 1367-2630

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10302 Condensed matter physics

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 3.570

Kód RIV

RIV/00216224:14740/15:00086051

Organizační jednotka

Středoevropský technologický institut

DOI

http://dx.doi.org/10.1088/1367-2630/17/5/053022

UT WoS

000355279800003

Klíčová slova anglicky

cuprate superconductors; infrared response; precursor superconducting pairing above T-c

Štítky

podil, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 13. 3. 2018 16:10, doc. Mgr. Adam Dubroka, Ph.D.

Anotace

V originále

We performed calculations of the in-plane infrared response of underdoped cuprate superconductors to clarify the origin of a characteristic dip feature which occurs in the published experimental spectra of the real part of the in-plane conductivity below an onset temperature T-ons considerably higher than T-c. We provide several arguments, based on a detailed comparison of our results with the published experimental data, confirming that the dip feature and the related features of the memory function M(omega)= M1(omega)+ iM2(omega)(a peak in M1 and a kink in M2) are due to superconducting pairing correlations that develop below T-ons. In particular, we show that (i) the dip feature, the peak and the kink of the low-temperature experimental data can be almost quantitatively reproduced by calculations based on a model of a d-wave superconductor. The formation of the dip feature in the experimental data below T-ons is shown to be analogous to the one occurring in the model spetra below T-c. (ii) Calculations based on simple models, for which the dip in the temperature range from T-c to T-ons is unrelated to superconducting pairing, predict a shift of the onset of the dip at the high-energy side upon entering the superconducting state, that is not observed in the experimental data; (iii) the conductivity data in conjunction with the recent photoemission data (Reber et al 2012 Nat. Phys. 8 606, Reber et al 2013 Phys. Rev. B 87 060506) imply the persistence of the coherence factor characteristic of superconducting pairing correlations in a range of temperatures above T-c.

Návaznosti

ED1.1.00/02.0068, projekt VaV

Název: CEITEC - central european institute of technology

EE2.3.30.0009, projekt VaV

Název: Zaměstnáním čerstvých absolventů doktorského studia k vědecké excelenci

286154, interní kód MU

Název: SYLICA - Synergies of Life and Material Sciences to Create a New Future (Akronym: SYLICA)

Investor: Evropská unie, SYLICA - Synergies of Life and Material Sciences to Create a New Future, Kapacity

Citovat

ŠOPÍK, Břetislav, Jiří CHALOUPKA, Adam DUBROKA, Christian BERNHARD a Dominik MUNZAR. Evidence for precursor superconducting pairing above T-c in underdoped cuprates from an analysis of the in-plane infrared response. New Journal of Physics. Britosl (Velká Británie): IOP PUBLISHING LTD, 2015, roč. 17, May, s. "nestránkováno", 18 s. ISSN 1367-2630. Dostupné z: https://dx.doi.org/10.1088/1367-2630/17/5/053022.

@article{1331277,
   author = {Šopík, Břetislav and Chaloupka, Jiří and Dubroka, Adam and Bernhard, Christian and Munzar, Dominik},
   article_location = {Britosl (Velká Británie)},
   article_number = {May},
   doi = {http://dx.doi.org/10.1088/1367-2630/17/5/053022},
   keywords = {cuprate superconductors; infrared response; precursor superconducting pairing above T-c},
   language = {eng},
   issn = {1367-2630},
   journal = {New Journal of Physics},
   title = {Evidence for precursor superconducting pairing above T-c in underdoped cuprates from an analysis of the in-plane infrared response},
   url = {http://iopscience.iop.org/article/10.1088/1367-2630/17/5/053022},
   volume = {17},
   year = {2015}
}

TY  - JOUR
ID  - 1331277
AU  - Šopík, Břetislav - Chaloupka, Jiří - Dubroka, Adam - Bernhard, Christian - Munzar, Dominik
PY  - 2015
TI  - Evidence for precursor superconducting pairing above T-c in underdoped cuprates from an analysis of the in-plane infrared response
JF  - New Journal of Physics
VL  - 17
IS  - May
SP  - "nestránkováno"
EP  - "nestránkováno"
PB  - IOP PUBLISHING LTD
SN  - 13672630
KW  - cuprate superconductors
KW  - infrared response
KW  - precursor superconducting pairing above T-c
UR  - http://iopscience.iop.org/article/10.1088/1367-2630/17/5/053022
L2  - http://iopscience.iop.org/article/10.1088/1367-2630/17/5/053022
N2  - We performed calculations of the in-plane infrared response of underdoped cuprate superconductors to clarify the origin of a characteristic dip feature which occurs in the published experimental spectra of the real part of the in-plane conductivity below an onset temperature T-ons considerably higher than T-c. We provide several arguments, based on a detailed comparison of our results with the published experimental data, confirming that the dip feature and the related features of the memory function M(omega)= M1(omega)+ iM2(omega)(a peak in M1 and a kink in M2) are due to superconducting pairing correlations that develop below T-ons. In particular, we show that (i) the dip feature, the peak and the kink of the low-temperature experimental data can be almost quantitatively reproduced by calculations based on a model of a d-wave superconductor. The formation of the dip feature in the experimental data below T-ons is shown to be analogous to the one occurring in the model spetra below T-c. (ii) Calculations based on simple models, for which the dip in the temperature range from T-c to T-ons is unrelated to superconducting pairing, predict a shift of the onset of the dip at the high-energy side upon entering the superconducting state, that is not observed in the experimental data; (iii) the conductivity data in conjunction with the recent photoemission data (Reber et al 2012 Nat. Phys. 8 606, Reber et al 2013 Phys. Rev. B 87 060506) imply the persistence of the coherence factor characteristic of superconducting pairing correlations in a range of temperatures above T-c.
ER  -

ŠOPÍK, Břetislav, Jiří CHALOUPKA, Adam DUBROKA, Christian BERNHARD a Dominik MUNZAR. Evidence for precursor superconducting pairing above T-c in underdoped cuprates from an analysis of the in-plane infrared response. \textit{New Journal of Physics}. Britosl (Velká Británie): IOP PUBLISHING LTD, 2015, roč.~17, May, s.~''nestránkováno'', 18 s. ISSN~1367-2630. Dostupné z: https://dx.doi.org/10.1088/1367-2630/17/5/053022.

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