Bose-Einstein condensation of S=1 nickel spin degrees of freedom in NiCl2-4SC(NH2)2

V.S. Zapf; D. Zocco; Britt Rosendahl Hansen; M. Jaime; N. Harrison; C.D. Batista; M. Kenzelmann; C. Niedermayer; A. Lacerda; A. Paduan-Filho

doi:10.1103/PhysRevLett.96.077204

Bose-Einstein condensation of S=1 nickel spin degrees of freedom in NiCl₂-4SC(NH₂)₂

V.S. Zapf, D. Zocco, Britt Rosendahl Hansen, M. Jaime, N. Harrison, C.D. Batista, M. Kenzelmann, C. Niedermayer, A. Lacerda, A. Paduan-Filho

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

It has recently been suggested that the organic compound NiCl₂-4SC(NH₂)₂ (DTN) undergoes field-induced Bose-Einstein condensation (BEC) of the Ni spin degrees of freedom. The Ni S = 1 spins exhibit
three-dimensional XY antiferromagnetism above a critical field H_c1 ∼ 2 T. The spin fluid can be described as a gas of hard-core bosons where the field-induced antiferromagnetic transition corresponds
to Bose-Einstein condensation. We have determined the spin Hamiltonian of DTN using inelastic neutron diffraction measurements, and we have studied the high-field phase diagram by means of specific heat and magnetocaloric effect measurements. Our results show that the field-temperature phase boundary approaches a power-law H - H_c1 ∞ Tαc near the quantum critical point, with an exponent that is
consistent with the 3D BEC universal value of α= 1.5.

Original language	English
Journal	Physical Review Letters
Volume	96
Pages (from-to)	077204
Number of pages	4
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.96.077204
Publication status	Published - 2006
Externally published	Yes

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@article{b9069cd849684b239623d66980e1eab3,

title = "Bose-Einstein condensation of S=1 nickel spin degrees of freedom in NiCl2-4SC(NH2)2",

abstract = "It has recently been suggested that the organic compound NiCl2-4SC(NH2)2 (DTN) undergoes field-induced Bose-Einstein condensation (BEC) of the Ni spin degrees of freedom. The Ni S = 1 spins exhibit three-dimensional XY antiferromagnetism above a critical field Hc1 ∼ 2 T. The spin fluid can be described as a gas of hard-core bosons where the field-induced antiferromagnetic transition corresponds to Bose-Einstein condensation. We have determined the spin Hamiltonian of DTN using inelastic neutron diffraction measurements, and we have studied the high-field phase diagram by means of specific heat and magnetocaloric effect measurements. Our results show that the field-temperature phase boundary approaches a power-law H - Hc1 ∞ Tαc near the quantum critical point, with an exponent that is consistent with the 3D BEC universal value of α= 1.5.",

author = "V.S. Zapf and D. Zocco and Hansen, {Britt Rosendahl} and M. Jaime and N. Harrison and C.D. Batista and M. Kenzelmann and C. Niedermayer and A. Lacerda and A. Paduan-Filho",

year = "2006",

doi = "10.1103/PhysRevLett.96.077204",

language = "English",

volume = "96",

pages = "077204",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

}

Bose-Einstein condensation of S=1 nickel spin degrees of freedom in NiCl₂-4SC(NH₂)₂. / Zapf, V.S.; Zocco, D.; Hansen, Britt Rosendahl; Jaime, M.; Harrison, N.; Batista, C.D.; Kenzelmann, M.; Niedermayer, C.; Lacerda, A.; Paduan-Filho, A.

In: Physical Review Letters, Vol. 96, 2006, p. 077204.

Research output: Contribution to journal › Journal article › Research › peer-review

TY - JOUR

T1 - Bose-Einstein condensation of S=1 nickel spin degrees of freedom in NiCl2-4SC(NH2)2

AU - Zapf, V.S.

AU - Zocco, D.

AU - Hansen, Britt Rosendahl

AU - Jaime, M.

AU - Harrison, N.

AU - Batista, C.D.

AU - Kenzelmann, M.

AU - Niedermayer, C.

AU - Lacerda, A.

AU - Paduan-Filho, A.

PY - 2006

Y1 - 2006

N2 - It has recently been suggested that the organic compound NiCl2-4SC(NH2)2 (DTN) undergoes field-induced Bose-Einstein condensation (BEC) of the Ni spin degrees of freedom. The Ni S = 1 spins exhibit three-dimensional XY antiferromagnetism above a critical field Hc1 ∼ 2 T. The spin fluid can be described as a gas of hard-core bosons where the field-induced antiferromagnetic transition corresponds to Bose-Einstein condensation. We have determined the spin Hamiltonian of DTN using inelastic neutron diffraction measurements, and we have studied the high-field phase diagram by means of specific heat and magnetocaloric effect measurements. Our results show that the field-temperature phase boundary approaches a power-law H - Hc1 ∞ Tαc near the quantum critical point, with an exponent that is consistent with the 3D BEC universal value of α= 1.5.

AB - It has recently been suggested that the organic compound NiCl2-4SC(NH2)2 (DTN) undergoes field-induced Bose-Einstein condensation (BEC) of the Ni spin degrees of freedom. The Ni S = 1 spins exhibit three-dimensional XY antiferromagnetism above a critical field Hc1 ∼ 2 T. The spin fluid can be described as a gas of hard-core bosons where the field-induced antiferromagnetic transition corresponds to Bose-Einstein condensation. We have determined the spin Hamiltonian of DTN using inelastic neutron diffraction measurements, and we have studied the high-field phase diagram by means of specific heat and magnetocaloric effect measurements. Our results show that the field-temperature phase boundary approaches a power-law H - Hc1 ∞ Tαc near the quantum critical point, with an exponent that is consistent with the 3D BEC universal value of α= 1.5.

U2 - 10.1103/PhysRevLett.96.077204

DO - 10.1103/PhysRevLett.96.077204

M3 - Journal article

VL - 96

SP - 077204

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

ER -