Dissipation in non-Kramers doublet of PrMg 3

Koji Araki; Terutaka Goto; Keisuke Mitsumoto; Yuichi Nemoto; Mitsuhiro Akatsu; Hiroyuki S. Suzuki; Hiroshi Tanida; Shigeru Takagi; Shadi Yasin; Sergei Zherlitsyn; Joachim Wosnitza

doi:10.1143/JPSJ.81.023710

Dissipation in non-Kramers doublet of PrMg ₃

Koji Araki, Terutaka Goto, Keisuke Mitsumoto, Yuichi Nemoto, Mitsuhiro Akatsu, Hiroyuki S. Suzuki, Hiroshi Tanida, Shigeru Takagi, Shadi Yasin, Sergei Zherlitsyn, Joachim Wosnitza

SCI - Physics

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

The low-temperature ultrasonic dispersion in the transverse (C ₁₁ - C ₁₂)/2 mode of PrMg ₃ with the non-Kramers-doublet ground state has been investigated in temperatures down to 20 mK. The dispersion is caused by a thermally activated motions characterized by an Arrhenius-type relaxation time of τ = τ ₀ exp(E/k _BT) with low activation energy, E = 500 mK, and slow attempt time, τ ₀ = 8.5 × 10 ^-10 s. The coupling of the electric quadrupoles of the non-Kramers-doublet ground state to transverse lattice vibrations leads to a vibronic ground state with dissipation. The vibronic state in PrMg ₃ releases the entropy of k _B ln 2 with lowering temperature across the activation energy. A Kondo-like singlet state due to the binding of the non-Kramers doublet to the lattice vibrations appears at low temperatures far below the activation energy.

Original language	English
Article number	023710
Journal	journal of the physical society of japan
Volume	81
Issue number	2
DOIs	https://doi.org/10.1143/JPSJ.81.023710
Publication status	Published - 2012 Feb

Keywords

Dissipation
Electric quadrupole
Kondo-like singlet
Non-kramers doublet
PrMg
Ultrasonic dispersion

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.81.023710

Cite this

@article{fe4934f6278b445aa8e6c33f668e4db2,

title = "Dissipation in non-Kramers doublet of PrMg 3 ",

abstract = "The low-temperature ultrasonic dispersion in the transverse (C 11 - C 12)/2 mode of PrMg 3 with the non-Kramers-doublet ground state has been investigated in temperatures down to 20 mK. The dispersion is caused by a thermally activated motions characterized by an Arrhenius-type relaxation time of τ = τ 0 exp(E/k BT) with low activation energy, E = 500 mK, and slow attempt time, τ 0 = 8.5 × 10 -10 s. The coupling of the electric quadrupoles of the non-Kramers-doublet ground state to transverse lattice vibrations leads to a vibronic ground state with dissipation. The vibronic state in PrMg 3 releases the entropy of k B ln 2 with lowering temperature across the activation energy. A Kondo-like singlet state due to the binding of the non-Kramers doublet to the lattice vibrations appears at low temperatures far below the activation energy.",

keywords = "Dissipation, Electric quadrupole, Kondo-like singlet, Non-kramers doublet, PrMg, Ultrasonic dispersion",

author = "Koji Araki and Terutaka Goto and Keisuke Mitsumoto and Yuichi Nemoto and Mitsuhiro Akatsu and Suzuki, {Hiroyuki S.} and Hiroshi Tanida and Shigeru Takagi and Shadi Yasin and Sergei Zherlitsyn and Joachim Wosnitza",

year = "2012",

month = feb,

doi = "10.1143/JPSJ.81.023710",

language = "English",

volume = "81",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

number = "2",

}

TY - JOUR

T1 - Dissipation in non-Kramers doublet of PrMg 3

AU - Araki, Koji

AU - Goto, Terutaka

AU - Mitsumoto, Keisuke

AU - Nemoto, Yuichi

AU - Akatsu, Mitsuhiro

AU - Suzuki, Hiroyuki S.

AU - Tanida, Hiroshi

AU - Takagi, Shigeru

AU - Yasin, Shadi

AU - Zherlitsyn, Sergei

AU - Wosnitza, Joachim

PY - 2012/2

Y1 - 2012/2

N2 - The low-temperature ultrasonic dispersion in the transverse (C 11 - C 12)/2 mode of PrMg 3 with the non-Kramers-doublet ground state has been investigated in temperatures down to 20 mK. The dispersion is caused by a thermally activated motions characterized by an Arrhenius-type relaxation time of τ = τ 0 exp(E/k BT) with low activation energy, E = 500 mK, and slow attempt time, τ 0 = 8.5 × 10 -10 s. The coupling of the electric quadrupoles of the non-Kramers-doublet ground state to transverse lattice vibrations leads to a vibronic ground state with dissipation. The vibronic state in PrMg 3 releases the entropy of k B ln 2 with lowering temperature across the activation energy. A Kondo-like singlet state due to the binding of the non-Kramers doublet to the lattice vibrations appears at low temperatures far below the activation energy.

AB - The low-temperature ultrasonic dispersion in the transverse (C 11 - C 12)/2 mode of PrMg 3 with the non-Kramers-doublet ground state has been investigated in temperatures down to 20 mK. The dispersion is caused by a thermally activated motions characterized by an Arrhenius-type relaxation time of τ = τ 0 exp(E/k BT) with low activation energy, E = 500 mK, and slow attempt time, τ 0 = 8.5 × 10 -10 s. The coupling of the electric quadrupoles of the non-Kramers-doublet ground state to transverse lattice vibrations leads to a vibronic ground state with dissipation. The vibronic state in PrMg 3 releases the entropy of k B ln 2 with lowering temperature across the activation energy. A Kondo-like singlet state due to the binding of the non-Kramers doublet to the lattice vibrations appears at low temperatures far below the activation energy.

KW - Dissipation

KW - Electric quadrupole

KW - Kondo-like singlet

KW - Non-kramers doublet

KW - PrMg

KW - Ultrasonic dispersion

UR - http://www.scopus.com/inward/record.url?scp=84863403448&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84863403448&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.81.023710

DO - 10.1143/JPSJ.81.023710

M3 - Article

AN - SCOPUS:84863403448

SN - 0031-9015

VL - 81

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 2

M1 - 023710

ER -