Unconventional Antiferromagnetic Quantum Critical Point in Ba(Fe0.97Cr0.03)(2)(As1-xPx)(2)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10398912" target="_blank" >RIV/00216208:11320/19:10398912 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=cyc1Qj6.vv" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=cyc1Qj6.vv</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.122.037001" target="_blank" >10.1103/PhysRevLett.122.037001</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Unconventional Antiferromagnetic Quantum Critical Point in Ba(Fe0.97Cr0.03)(2)(As1-xPx)(2)

Popis výsledku v původním jazyce

We have systematically studied physical properties of Ba(Fe0.97Cr0.03)(2)(As1-xPx)(2), where superconductivity in BaFe2(As1-xPx)(2) is fully suppressed by just 3% of Cr substitution of Fe. A quantum critical point is revealed at x similar to 0.42, where non-Fermi-liquid behaviors similar to those in BaFe2(As1-xPx)(2) are observed. Neutron diffraction and inelastic neutron scattering measurements suggest that the quantum critical point is associated with the antiferromagnetic order, which is not of conventional spin-density-wave type as evidenced by the omega/T scaling of spin excitations. On the other hand, no divergence of low-temperature nematic susceptibility is observed when x is decreased to 0.42 from higher doping level, demonstrating that there are no nematic quantum critical fluctuations. Our results suggest that non-Fermi-liquid behaviors in iron-based superconductors can be solely resulted from the antiferromagnetic quantum critical fluctuations, which cast doubts on the role of nematic fluctuations played in the normal-state properties in iron-based superconductors.

Název v anglickém jazyce

Unconventional Antiferromagnetic Quantum Critical Point in Ba(Fe0.97Cr0.03)(2)(As1-xPx)(2)

Popis výsledku anglicky

We have systematically studied physical properties of Ba(Fe0.97Cr0.03)(2)(As1-xPx)(2), where superconductivity in BaFe2(As1-xPx)(2) is fully suppressed by just 3% of Cr substitution of Fe. A quantum critical point is revealed at x similar to 0.42, where non-Fermi-liquid behaviors similar to those in BaFe2(As1-xPx)(2) are observed. Neutron diffraction and inelastic neutron scattering measurements suggest that the quantum critical point is associated with the antiferromagnetic order, which is not of conventional spin-density-wave type as evidenced by the omega/T scaling of spin excitations. On the other hand, no divergence of low-temperature nematic susceptibility is observed when x is decreased to 0.42 from higher doping level, demonstrating that there are no nematic quantum critical fluctuations. Our results suggest that non-Fermi-liquid behaviors in iron-based superconductors can be solely resulted from the antiferromagnetic quantum critical fluctuations, which cast doubts on the role of nematic fluctuations played in the normal-state properties in iron-based superconductors.

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

2019

Kód důvěrnosti údajů

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

Název periodika

Physical Review Letters

ISSN

0031-9007

e-ISSN

—

Svazek periodika

122

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

037001

Kód UT WoS článku

000456782500010

EID výsledku v databázi Scopus

2-s2.0-85060587220