Structural, thermodynamic, and local probe investigations of the honeycomb material 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Ag</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>LiMn</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:mrow></mml:math>

Kumar, Rakesh; Dey, Tusharkanti; Ramesha, K.; Chakraborty, Atasi; Dasgupta, Indra; Еремина, Р. М.; Tóth, S.; Shahee, Aga; Kundu, Sumit; Prinz-Zwick, M.; Gippius, A. A.; Nidda, H.-A. Krug von; Büttgen, N.; Gegenwart, P.; Mahajan, A. V.

doi:10.1103/physrevb.99.144429

Cited by 12 publications

(12 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We have been working on the hexagonal Ag 3 LiM 2 O 6 (M = Mn, Ru, Ir) system with the intention of developing a comprehensive understanding of this honeycomb system. The Mn-based (3d 3 or S = 3/2) system exhibits long-range order below about 50 K. There is also evidence of Berezinskii-Kosterlitz-Thouless behavior from an analysis of the electron spin resonance line broadening data near the transition temperature [21]. The Ru-based system (4d 4 , which might be S = 1 or J = 0) was expected to be a possible candidate for excitonic magnetism [22].…”

Section: Introductionmentioning

confidence: 99%

Unusual spin dynamics in the low-temperature magnetically ordered state of Ag3LiIr2O6

et al. 2021

Self Cite

View full text Add to dashboard Cite

Recently, there have been contrary claims of Kitaev spin-liquid behavior and ordered behavior in the honeycomb compound Ag 3 LiIr 2 O 6 based on various experimental signatures. Our investigations on this system reveal a low-temperature ordered state with persistent dynamics down to the lowest temperatures. Magnetic order is confirmed by clear oscillations in the muon spin relaxation (μSR) time spectrum below 9 K until 52 mK. Coincidentally in 7 Li nuclear magnetic resonance, a wipeout of the signal is observed below ∼10 K, which again strongly indicates magnetic order in the low-temperature regime. This is supported by our density functional theory calculations which show an appreciable Heisenberg exchange term in the spin Hamiltonian that favors magnetic ordering. The 7 Li shift and spin-lattice relaxation rate also show anomalies at ∼50 K. They are likely related to the onset of dynamic magnetic correlations, but their origin is not completely clear. Detailed analysis of our μSR data is consistent with a coexistence of incommensurate Néel and striped environments. A significant and undiminished dynamical relaxation rate (∼5 MHz) as seen in μSR deep into the ordered phase indicates enhanced quantum fluctuations in the ordered state.

show abstract

Section: Introductionmentioning

confidence: 99%

Unusual spin dynamics in the low-temperature magnetically ordered state of Ag3LiIr2O6

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…We have been working on the hexagonal Ag 3 LiM 2 O 6 (M = Mn, Ru, Ir) system with the intention of devel-oping a comprehensive understanding of this honeycomb system. The Mn-based (3d 3 or S = 3/2) system exhibits long-range order below about 50 K. There is also evidence of Berezinskii-Kosterlitz-Thouless behavior from an analysis of the electron spin resonance line broadening data near the transition temperature [21]. The Ru-based system (4d 4 which might be S = 1 or J = 0) was expected to be a possible candidate for excitonic magnetism [22].…”

Section: Introductionmentioning

confidence: 99%

Unusual spin dynamics in the low-temperature magnetically ordered state of Ag$_{3}$LiIr$_{2}$O$_{6}$

Chakraborty,

Kumar,

Bachhar

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Recently, there have been contrary claims of Kitaev spin-liquid behaviour and ordered behavior in the honeycomb compound Ag3LiIr2O6 based on various experimental signatures. Our investigations on this system reveal a low-temperature ordered state with persistent dynamics down to the lowest temperatures. Magnetic order is confirmed by clear oscillations in the muon spin relaxation (µSR) time spectrum below 9 K till 52 mK. Coincidentally in 7 Li nuclear magnetic resonance, a wipe-out of the signal is observed below ∼ 10 K which again strongly indicates magnetic order in the low temperature regime. This is supported by our density functional theory calculations which show an appreciable Heisenberg exchange term in the spin Hamiltonian that favors magnetic ordering. The 7 Li shift and spin-lattice relaxation rate also show anomalies at ∼ 50 K. They are likely related to the onset of dynamic magnetic correlations, but their origin is not completely clear. Detailed analysis of our µSR data is consistent with a co-existence of incommensurate Néel and striped environments. A significant and undiminished dynamical relaxation rate (∼ 5 MHz) as seen in µSR deep into the ordered phase indicates enhanced quantum fluctuations in the ordered state.

show abstract

“…Here J 1 , J 2 , J ⊥ 1 and J ⊥ 2 are respectively the nearestneighbor (nn), the next-nearest-neighbor (nnn) intralayer and (two distinct) inter-layer Heisenberg exchange parameters. We have calculated them employing the "Four State" method [49,50]. This is based on a computation of the total energy of the system with collinear spin alignment, where the spin configuration on two chosen sites are modified while restricting rest of the spins to a base configuration.…”

Section: Introductionmentioning

confidence: 99%

Gapless quantum spin liquid in the triangular system Sr$_{3}$CuSb$_{2}$O$_{9}$

Kundu,

Shahee,

Chakraborty

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

We report gapless quantum spin liquid behavior in the layered triangular Sr3CuSb2O9 (SCSO) system. X-ray diffraction shows superlattice reflections associated with atomic site ordering into triangular Cu planes well-separated by Sb planes. Muon spin relaxation (µSR) measurements show that the S = 1 2 moments at the magnetically active Cu sites remain dynamic down to 65 mK in spite of a large antiferromagnetic exchange scale evidenced by a large Curie-Weiss temperature θcw −143 K as extracted from the bulk susceptibility. Specific heat measurements also show no sign of long-range order down to 0.35 K. The magnetic specific heat (C m) below 5 K reveals a C m = γT + αT 2 behavior. The significant T 2 contribution to the magnetic specific heat invites a phenomenology in terms of the so-called Dirac spinon excitations with a linear dispersion. From the low-T specific heat data, we estimate the dominant exchange scale to be ∼ 36 K using a Dirac spin liquid ansatz which is not far from the values inferred from microscopic density functional theory calculations (∼ 45 K) as well as high-temperature susceptibility analysis (∼ 70 K). The linear specific heat coefficient is about 18 mJ/mol-K 2 which is somewhat larger than for typical Fermi liquids.

show abstract

Structural, thermodynamic, and local probe investigations of the honeycomb material Ag3LiMn2O6

Cited by 12 publications

References 41 publications

Unusual spin dynamics in the low-temperature magnetically ordered state of Ag3LiIr2O6

Unusual spin dynamics in the low-temperature magnetically ordered state of Ag3LiIr2O6

Unusual spin dynamics in the low-temperature magnetically ordered state of Ag$_{3}$LiIr$_{2}$O$_{6}$

Gapless quantum spin liquid in the triangular system Sr$_{3}$CuSb$_{2}$O$_{9}$

Contact Info

Product

Resources

About