Exact diagonalization study of the effects of Zn and Ni impurities on the pseudogap of underdoped cuprate high-Tc superconductors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F16%3A00090945" target="_blank" >RIV/00216224:14310/16:00090945 - isvavai.cz</a>

Výsledek na webu

<a href="http://journals.aps.org/prb/pdf/10.1103/PhysRevB.93.094512" target="_blank" >http://journals.aps.org/prb/pdf/10.1103/PhysRevB.93.094512</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.93.094512" target="_blank" >10.1103/PhysRevB.93.094512</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Exact diagonalization study of the effects of Zn and Ni impurities on the pseudogap of underdoped cuprate high-Tc superconductors

Popis výsledku v původním jazyce

The influence of Zn and Ni impurities on the normal-state pseudogap of underdoped high-Tc cuprate superconductors is studied using exact diagonalization of effective t - J-like Hamiltonians describing low energy electronic excitations of the CuO2 plane with some of the copper ions replaced with Zn/Ni. The Ni case Hamiltonian has been obtained by a sequence of approximations from a more complete model involving Cu 3d, Ni 3d, and O 2p orbitals. Our main findings are: (i) The width OmegaPG of the pseudogap occurring in the many body density of states, and manifesting itself also in the c-axis infrared conductivity, decreases with increasing Zn concentration as a consequence of a suppression of short range spin correlations. (ii) In the case of one hole and one Ni impurity, the hole is, for realistic values of the model parameters, weakly bound to the Ni site. This causes a slight increase of OmegaPG with respect to the pure case.

Název v anglickém jazyce

Exact diagonalization study of the effects of Zn and Ni impurities on the pseudogap of underdoped cuprate high-Tc superconductors

Popis výsledku anglicky

The influence of Zn and Ni impurities on the normal-state pseudogap of underdoped high-Tc cuprate superconductors is studied using exact diagonalization of effective t - J-like Hamiltonians describing low energy electronic excitations of the CuO2 plane with some of the copper ions replaced with Zn/Ni. The Ni case Hamiltonian has been obtained by a sequence of approximations from a more complete model involving Cu 3d, Ni 3d, and O 2p orbitals. Our main findings are: (i) The width OmegaPG of the pseudogap occurring in the many body density of states, and manifesting itself also in the c-axis infrared conductivity, decreases with increasing Zn concentration as a consequence of a suppression of short range spin correlations. (ii) In the case of one hole and one Ni impurity, the hole is, for realistic values of the model parameters, weakly bound to the Ni site. This causes a slight increase of OmegaPG with respect to the pure case.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Physical Review B

ISSN

2469-9950

e-ISSN

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Svazek periodika

93

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

"nestrankovano"

Kód UT WoS článku

000371729000007

EID výsledku v databázi Scopus

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