Structural and magnetic properties in the quantum<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>S</mml:mi><mml:mo>=</mml:mo><mml:mfrac><mml:mn>1</mml:mn><mml:mn>2</mml:mn></mml:mfrac></mml:mrow></mml:math>dimer system Ba<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>(Cr<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mrow><

Hong, Tao; Zhu, Leyi; Ke, Xianglin; Garlea, V. Ovidiu; Qiu, Yiming; Nambu, Yusuke; Yoshizawa, H.; Zhu, Mengze; Granroth, G. E.; Savici, A. T.; Gai, Zheng; Zhou, H. D.

doi:10.1103/physrevb.87.144427

Cited by 7 publications

(3 citation statements)

References 44 publications

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“…The most prominent effect of such a chemically induced modification is a shift of the BEC phase boundary in the magnetic phase diagram [2]. However, experiments on non-magnetically substituted Ba 3 (Cr 1−x V x )O 8 suggest no significant change in the strength of the intradimer coupling J 0 and an increase of the effective interdimer coupling J e along with impurity substitution [15]. Similar conclusions have been drawn on…”

Section: Introductionsupporting

confidence: 63%

Single-crystal growth and study of the mixed spin-dimer system Ba3−xSrxCr2
Gazizulina
¹
,
Quintero-Castro
²
,
Schilling
³

2017
Phys. Rev. B
5
2
10
0
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The compounds Sr 3 Cr 2 O 8 and Ba 3 Cr 2 O 8 are insulating dimerized antiferromagnets with Cr 5+ magnetic ions. These spin− 1 2 ions form hexagonal bilayers with a strong intradimer antiferromagnetic interaction that leads to a singlet ground state and gapped triplet states. We report on the effect on the magnetic properties of Sr 3 Cr 2 O 8 by introducing chemical disorder upon replacing Sr by Ba. Two single crystals of Ba 3−x Sr x Cr 2 O 8 with x = 2.9 (3.33% of mixing) and x = 2.8 (6.66% of mixing) were grown in a four-mirror-type optical floating-zone furnace. The magnetic properties of these compounds were studied by magnetization measurements. Inelastic neutron-scattering measurements on Ba 0.1 Sr 2.9 Cr 2 O 8 were performed in order to determine the interaction constants and the spin gap for x = 2.9. The intradimer interaction constant is found to be J 0 = 5.332(2)meV , about 4% smaller than that of pure Sr 3 Cr 2 O 8 , whereas the interdimer exchange interaction J e is smaller by 7%. These results indicate a noticeable change in the magnetic properties by a random substitution effect.

show abstract

Section: Introductionsupporting

confidence: 63%

Single-crystal growth and study of the mixed spin-dimer system Ba3−xSrxCr2
Gazizulina
¹
,
Quintero-Castro
²
,
Schilling
³

2017
Phys. Rev. B
5
2
10
0
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show abstract

“…A Bogoliubov-de Gennes form of the two-sublattice triplon-band Hamiltonian is generalized into a 4 × 4 matrix as follows:where d = ( d x , d y , d z ) is a three-component real vector that is a function of k . Then, by following the definition of the Berry connection for bosonic systems 13,18 , its real part is obtained aswhere ± represents two subbands. Irrespective of which gauge is selected, the real part of the Berry connection corresponds to that derived from a 2 × 2 matrix, = J 1 + d · σ , implying that topological properties are the same for both Hamiltonians, and (see Supplementary Note 4 for a detailed derivation).…”

Section: Discussionmentioning

confidence: 99%

Triplon band splitting and topologically protected edge states in the dimerized antiferromagnet

et al. 2019

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Search for topological materials has been actively promoted in the field of condensed matter physics for their potential application in energy-efficient information transmission and processing. Recent studies have revealed that topologically invariant states, such as edge states in topological insulators, can emerge not only in a fermionic electron system but also in a bosonic system, enabling nondissipative propagation of quasiparticles. Here we report the topologically nontrivial triplon bands measured by inelastic neutron scattering on the spin-1/2 two-dimensional dimerized antiferromagnet Ba 2 CuSi 2 O 6 Cl 2 . The excitation spectrum exhibits two triplon bands that are clearly separated by a band gap due to a small alternation in interdimer exchange interaction, consistent with a refined crystal structure. By analytically modeling the triplon dispersion, we show that Ba 2 CuSi 2 O 6 Cl 2 is the first bosonic realization of the coupled Su-Schrieffer-Heeger model, where the presence of topologically protected edge states is prompted by a bipartite nature of the lattice.

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Section: Introductionmentioning

confidence: 99%

Single crystal growth and study of the magnetic properties of the mixed spin-dimer system Ba$_{3-x}$Sr$_{x}$Cr$_{2}$O$_{8}$

Gazizulina,

Quintero-Castro,

Schilling

2017

Preprint

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The compounds Sr 3 Cr 2 O 8 and Ba 3 Cr 2 O 8 are insulating dimerized antiferromagnets with Cr 5+ magnetic ions. These spin-1 2 ions form hexagonal bilayers with a strong intradimer antiferromagnetic interaction, that leads to a singlet ground state and gapped triplet states. We report on the effect on the magnetic properties of Sr 3 Cr 2 O 8 by introducing chemical disorder upon replacing Sr by Ba. Two single crystals of Ba 3−x Sr x Cr 2 O 8 with x = 2.9 (3.33% of mixing) and x = 2.8 (6.66%) were grown in a four-mirror type optical floating-zone furnace. The magnetic properties on these compounds were studied by magnetization measurements. Inelastic neutron scattering measurements on Ba 0.1 Sr 2.9 Cr 2 O 8 were performed in order to determine the interaction constants and the spin gap for x = 2.9. The intradimer interaction constant is found to be J 0 =5.332(2) meV, about 4% smaller than that of pure Sr 3 Cr 2 O 8 , while the interdimer exchange interaction J e is smaller by 6.9%. These results indicate a noticeable change in the magnetic properties by a random substitution effect.

show abstract

Structural and magnetic properties in the quantumS=12dimer system Ba3(Cr<

Cited by 7 publications

References 44 publications

Single-crystal growth and study of the mixed spin-dimer system Ba3−xSrxCr2
Gazizulina
¹
,
Quintero-Castro
²
,
Schilling
³

2017
Phys. Rev. B
5
2
10
0
View full text Add to dashboard Cite

Single-crystal growth and study of the mixed spin-dimer system Ba3−xSrxCr2
Gazizulina
¹
,
Quintero-Castro
²
,
Schilling
³

2017
Phys. Rev. B
5
2
10
0
View full text Add to dashboard Cite

Triplon band splitting and topologically protected edge states in the dimerized antiferromagnet

Single crystal growth and study of the magnetic properties of the mixed spin-dimer system Ba$_{3-x}$Sr$_{x}$Cr$_{2}$O$_{8}$

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Structural and magnetic properties in the quantumS=12dimer system Ba3(Cr<

Cited by 7 publications

References 44 publications

Single-crystal growth and study of the mixed spin-dimer system Ba3−xSrxCr2Gazizulina1, Quintero-Castro2, Schilling3 2017Phys. Rev. B52100View full textAdd to dashboardCite

Single-crystal growth and study of the mixed spin-dimer system Ba3−xSrxCr2Gazizulina1, Quintero-Castro2, Schilling3 2017Phys. Rev. B52100View full textAdd to dashboardCite

Triplon band splitting and topologically protected edge states in the dimerized antiferromagnet

Single crystal growth and study of the magnetic properties of the mixed spin-dimer system Ba$_{3-x}$Sr$_{x}$Cr$_{2}$O$_{8}$

Contact Info

Product

Resources

About

Single-crystal growth and study of the mixed spin-dimer system Ba3−xSrxCr2
Gazizulina
¹
,
Quintero-Castro
²
,
Schilling
³

2017
Phys. Rev. B
5
2
10
0
View full text Add to dashboard Cite

Single-crystal growth and study of the mixed spin-dimer system Ba3−xSrxCr2
Gazizulina
¹
,
Quintero-Castro
²
,
Schilling
³

2017
Phys. Rev. B
5
2
10
0
View full text Add to dashboard Cite