Evidence for reentrant quantum paraelectric state preceded by a multiglass phase with a nonclassical exponent and magnetodielectric coupling in <math><mrow><mi>SrF</mi><msub><mi mathvariant="normal">e</mi><mn>12</mn></msub><msub><mi mathvariant="normal">O</mi><mn>19</mn></msub></mrow></math>

Kumar, Keshav; Pandey, Dhananjai

doi:10.1103/PhysRevB.109.094302

Evidence for reentrant quantum paraelectric state preceded by a multiglass phase with a nonclassical exponent and magnetodielectric coupling in $SrF e_{12} O_{19}$

Dec 17, 2023

21 pages

Published in:

Phys.Rev.B 109 (2024) 9, 094302

Published: Mar 1, 2024

e-Print:

2312.10619 [cond-mat.str-el]

DOI:

10.1103/PhysRevB.109.094302 (publication)

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Abstract: (APS)

Evidence is presented for a reentrant quantum paraelectric (QPE) state preceded by a dipole glass (DG) phase with a nonclassical exponent in the quantum critical regime of

SrF e_{12} O_{19}

. It is shown that the DG transition is accompanied by a spin glass (SG) transition. Further, the ergodic symmetry-breaking temperatures for the DG and SG transitions coincide (

T_{DG} \sim T_{SG}

) within

\pm 1

K suggesting that

SrF e_{12} O_{19}

exhibits a canonical multiglass state. It is shown that these transitions are coupled through biquadratic and lower order couplings of two diverse order parameter fields. The stability of the dipole glass state is enhanced magnetically as evidenced by the increase in the freezing temperature with magnetic field (

H

). The reentrant QPE state, on the other hand, is found to give way to another frequency-dependent peak in the temperature dependence of dielectric constant, most likely a DG phase, under dc magnetic field (

H

). Further, this transition is not linked to any magnetic transition, in sharp contrast to the higher temperature multiglass transition. The transition temperature of this phase decreases with increasing magnetic field for a fixed frequency unlike the higher temperature DG transition. This raises the possibility of locating a quantum critical point (QCP) in this system at a higher magnetic field than that used in the present work. These results are discussed in the light of quantum critical models of multiferroic transitions. Our results highlight the need for more theoretical studies specific to multiferroic quantum criticality in multiglass systems.

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21 page, 5 figures

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Evidence for reentrant quantum paraelectric state preceded by a multiglass phase with a nonclassical exponent and magnetodielectric coupling in SrFe12O19

Citations per year

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Quantum Phase Transition in the One-Dimensional Water Chain

Universal Parity Quantum Computing

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What lies beneath the dome?

Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms

: An intrinsic quantum paraelectric below 4 K

Experimental studies on quantum ferroelectrics

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Quantum phase transition in

Electric field dependence of optical-phonon frequencies

Electric-field-induced Raman effect in paraelectric crystals

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Evidence for reentrant quantum paraelectric state preceded by a multiglass phase with a nonclassical exponent and magnetodielectric coupling in $SrF e_{12} O_{19}$