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Investigate magnetic-field-induced phase transitions and critical ordering in three-dimensional arrays of coupled two-leg spin ladders between critical field thresholds.

May 1, 1999Physical review. B, Condensed matterOpen Access

Coupled ladders in a magnetic field

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Investigate magnetic-field-induced phase transitions and critical ordering in three-dimensional arrays of coupled two-leg spin ladders between critical field thresholds.
Calculated correlation functions quantitatively for an isolated strong-coupling spin ladder (J_perp >> J_parallel) across magnetic field strengths between h_c1 and h_c2.
Modeled three-dimensional antiferromagnetic interladder coupling within the universality class of hard-core boson Bose condensation.
Computed critical temperature profiles T_c(h) and nuclear magnetic resonance (NMR) relaxation rates relevant to compounds such as Cu2(C5H12N2)2Cl4.
Demonstrated that three-dimensional magnetic ordering in coupled ladders falls into the universality class of Bose-Einstein condensation of hard-core bosons.
Determined that the critical temperature T_c(h) displays a characteristic camel-like shape with a local minimum at h = (h_c1 + h_c2)/2 and scales as T_c ~ (h - h_c1)^(2/3) near the lower critical field.

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Implication

Theoretical analysis demonstrates Bose condensation and a camel-like critical temperature curve in coupled spin ladders, indicating field-tunable magnetic ordering.

Cite This Study

Giamarchi et al. (1999) studied this question.

synapsesocial.com/papers/6a7054672163a0a01bc48d47 https://doi.org/10.1103/physrevb.59.11398

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Implication

Theoretical analysis demonstrates Bose condensation and a camel-like critical temperature curve in coupled spin ladders, indicating field-tunable magnetic ordering.

Coupled ladders in a magnetic field

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Coupled ladders in a magnetic field

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