Coexistence of random singlets and disordered Kitaev spin liquid in H3LiIr2 O6

Chanhyeon Lee; Suheon Lee; Youngsu Choi; C. Wang; H. Luetkens; T. Shiroka; Zeehoon Jang; Young Gui Yoon; Kwang Yong Choi

doi:10.1103/PhysRevB.107.014424

Coexistence of random singlets and disordered Kitaev spin liquid in H3LiIr2 O6

Chanhyeon Lee
, Suheon Lee
, Youngsu Choi
, C. Wang
, H. Luetkens
, T. Shiroka
, Zeehoon Jang
, Young Gui Yoon
, Kwang Yong Choi

Department of Physics

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

18 Scopus citations

Abstract

We combine static magnetic susceptibility χ(T), muon-spin relaxation, and H1 nuclear magnetic resonance measurements to explore the spin dynamics in the disordered-induced quantum spin liquid candidate H3LiIr2O6. Inverse Laplace transform analysis of the H1 spin-lattice relaxation rate 1/T1 enables us to identify two characteristic temperatures Tg=110K and T∗=26K. Below Tg, a slower 1/T1slow component dictated by gapped excitations with a spin gap Δh=30-38K evolves distinctly from a faster 1/T1fast component pertaining to gapless excitations. Furthermore, we observe a sub-Curie divergent χ(T)?T-0.68, a power-law dependent 1/T1fast?T1.4, and a weakly activated 1/T1slow?exp(-Δl/kBT) (Δl=3-6K) below T∗=26K. All these features suggest the coexistence of a disordered spin-liquid state and spin singlets with spatially distributed gaps.

Original language	English
Article number	014424
Journal	Physical Review B
Volume	107
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.107.014424
State	Published - 1 Jan 2023

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@article{579eb9e31eac45deab2b7b52c4e6faf2,

title = "Coexistence of random singlets and disordered Kitaev spin liquid in H3LiIr2 O6",

abstract = "We combine static magnetic susceptibility χ(T), muon-spin relaxation, and H1 nuclear magnetic resonance measurements to explore the spin dynamics in the disordered-induced quantum spin liquid candidate H3LiIr2O6. Inverse Laplace transform analysis of the H1 spin-lattice relaxation rate 1/T1 enables us to identify two characteristic temperatures Tg=110K and T∗=26K. Below Tg, a slower 1/T1slow component dictated by gapped excitations with a spin gap Δh=30-38K evolves distinctly from a faster 1/T1fast component pertaining to gapless excitations. Furthermore, we observe a sub-Curie divergent χ(T)?T-0.68, a power-law dependent 1/T1fast?T1.4, and a weakly activated 1/T1slow?exp(-Δl/kBT) (Δl=3-6K) below T∗=26K. All these features suggest the coexistence of a disordered spin-liquid state and spin singlets with spatially distributed gaps.",

author = "Chanhyeon Lee and Suheon Lee and Youngsu Choi and C. Wang and H. Luetkens and T. Shiroka and Zeehoon Jang and Yoon, \{Young Gui\} and Choi, \{Kwang Yong\}",

note = "Publisher Copyright: {\textcopyright} 2023 American Physical Society. ",

year = "2023",

month = jan,

day = "1",

doi = "10.1103/PhysRevB.107.014424",

language = "English",

volume = "107",

journal = "Physical Review B",

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TY - JOUR

T1 - Coexistence of random singlets and disordered Kitaev spin liquid in H3LiIr2 O6

AU - Lee, Chanhyeon

AU - Lee, Suheon

AU - Choi, Youngsu

AU - Wang, C.

AU - Luetkens, H.

AU - Shiroka, T.

AU - Jang, Zeehoon

AU - Yoon, Young Gui

AU - Choi, Kwang Yong

PY - 2023/1/1

Y1 - 2023/1/1

N2 - We combine static magnetic susceptibility χ(T), muon-spin relaxation, and H1 nuclear magnetic resonance measurements to explore the spin dynamics in the disordered-induced quantum spin liquid candidate H3LiIr2O6. Inverse Laplace transform analysis of the H1 spin-lattice relaxation rate 1/T1 enables us to identify two characteristic temperatures Tg=110K and T∗=26K. Below Tg, a slower 1/T1slow component dictated by gapped excitations with a spin gap Δh=30-38K evolves distinctly from a faster 1/T1fast component pertaining to gapless excitations. Furthermore, we observe a sub-Curie divergent χ(T)?T-0.68, a power-law dependent 1/T1fast?T1.4, and a weakly activated 1/T1slow?exp(-Δl/kBT) (Δl=3-6K) below T∗=26K. All these features suggest the coexistence of a disordered spin-liquid state and spin singlets with spatially distributed gaps.

AB - We combine static magnetic susceptibility χ(T), muon-spin relaxation, and H1 nuclear magnetic resonance measurements to explore the spin dynamics in the disordered-induced quantum spin liquid candidate H3LiIr2O6. Inverse Laplace transform analysis of the H1 spin-lattice relaxation rate 1/T1 enables us to identify two characteristic temperatures Tg=110K and T∗=26K. Below Tg, a slower 1/T1slow component dictated by gapped excitations with a spin gap Δh=30-38K evolves distinctly from a faster 1/T1fast component pertaining to gapless excitations. Furthermore, we observe a sub-Curie divergent χ(T)?T-0.68, a power-law dependent 1/T1fast?T1.4, and a weakly activated 1/T1slow?exp(-Δl/kBT) (Δl=3-6K) below T∗=26K. All these features suggest the coexistence of a disordered spin-liquid state and spin singlets with spatially distributed gaps.

UR - https://www.scopus.com/pages/publications/85147550059

U2 - 10.1103/PhysRevB.107.014424

DO - 10.1103/PhysRevB.107.014424

M3 - Article

AN - SCOPUS:85147550059

SN - 2469-9950

VL - 107

JO - Physical Review B

JF - Physical Review B

IS - 1

M1 - 014424

ER -

Coexistence of random singlets and disordered Kitaev spin liquid in H3LiIr2 O6

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