S= 12 quantum critical spin ladders produced by orbital ordering in Ba2CuTeO6

A. S. Gibbs; A. Yamamoto; A. N. Yaresko; K. S. Knight; H. Yasuoka; M. Majumder; M. Baenitz; P. J. Saines; J. R. Hester; D. Hashizume; A. Kondo; K. Kindo; H. Takagi

doi:10.1103/PhysRevB.95.104428

S= 12 quantum critical spin ladders produced by orbital ordering in Ba2CuTeO6

A. S. Gibbs, A. Yamamoto, A. N. Yaresko, K. S. Knight, H. Yasuoka, M. Majumder, M. Baenitz, P. J. Saines, J. R. Hester, D. Hashizume, A. Kondo, K. Kindo, H. Takagi

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

11 Citations (Scopus)

Abstract

The ordered hexagonal perovskite Ba2CuTeO6 hosts weakly coupled S=12 spin ladders produced by an orbital ordering of Cu2+. The magnetic susceptibility χ(T) of Ba2CuTeO6 is well described by that expected for isolated spin ladders with exchange coupling of J≈86K but shows a deviation from the expected thermally activated behavior at low temperatures below T∗≈25K. An anomaly in χ(T), indicative of magnetic ordering, is observed at Tmag=16K. No clear signature of long-range ordering, however, is captured so far in NMR 1/T1, specific heat or neutron diffraction measurements at and below Tmag. The marginal magnetic transition, indicative of strong quantum fluctuations, is evidence that Ba2CuTeO6 is in very close proximity to a quantum critical point between magnetically ordered and spin-gapped phases controlled by interladder couplings.

Original language	English
Article number	104428
Journal	Physical Review B
Volume	95
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.95.104428
Publication status	Published - 2017 Mar 21
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1103/PhysRevB.95.104428

Cite this

@article{0d64d51c60764d0abe3b6c31308f281b,

title = "S= 12 quantum critical spin ladders produced by orbital ordering in Ba2CuTeO6",

abstract = "The ordered hexagonal perovskite Ba2CuTeO6 hosts weakly coupled S=12 spin ladders produced by an orbital ordering of Cu2+. The magnetic susceptibility χ(T) of Ba2CuTeO6 is well described by that expected for isolated spin ladders with exchange coupling of J≈86K but shows a deviation from the expected thermally activated behavior at low temperatures below T∗≈25K. An anomaly in χ(T), indicative of magnetic ordering, is observed at Tmag=16K. No clear signature of long-range ordering, however, is captured so far in NMR 1/T1, specific heat or neutron diffraction measurements at and below Tmag. The marginal magnetic transition, indicative of strong quantum fluctuations, is evidence that Ba2CuTeO6 is in very close proximity to a quantum critical point between magnetically ordered and spin-gapped phases controlled by interladder couplings.",

author = "Gibbs, {A. S.} and A. Yamamoto and Yaresko, {A. N.} and Knight, {K. S.} and H. Yasuoka and M. Majumder and M. Baenitz and Saines, {P. J.} and Hester, {J. R.} and D. Hashizume and A. Kondo and K. Kindo and H. Takagi",

note = "Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

year = "2017",

month = mar,

day = "21",

doi = "10.1103/PhysRevB.95.104428",

language = "English",

volume = "95",

journal = "Physical Review B-Condensed Matter",

issn = "0163-1829",

publisher = "American Physical Society",

number = "10",

}

TY - JOUR

T1 - S= 12 quantum critical spin ladders produced by orbital ordering in Ba2CuTeO6

AU - Gibbs, A. S.

AU - Yamamoto, A.

AU - Yaresko, A. N.

AU - Knight, K. S.

AU - Yasuoka, H.

AU - Majumder, M.

AU - Baenitz, M.

AU - Saines, P. J.

AU - Hester, J. R.

AU - Hashizume, D.

AU - Kondo, A.

AU - Kindo, K.

AU - Takagi, H.

PY - 2017/3/21

Y1 - 2017/3/21

N2 - The ordered hexagonal perovskite Ba2CuTeO6 hosts weakly coupled S=12 spin ladders produced by an orbital ordering of Cu2+. The magnetic susceptibility χ(T) of Ba2CuTeO6 is well described by that expected for isolated spin ladders with exchange coupling of J≈86K but shows a deviation from the expected thermally activated behavior at low temperatures below T∗≈25K. An anomaly in χ(T), indicative of magnetic ordering, is observed at Tmag=16K. No clear signature of long-range ordering, however, is captured so far in NMR 1/T1, specific heat or neutron diffraction measurements at and below Tmag. The marginal magnetic transition, indicative of strong quantum fluctuations, is evidence that Ba2CuTeO6 is in very close proximity to a quantum critical point between magnetically ordered and spin-gapped phases controlled by interladder couplings.

AB - The ordered hexagonal perovskite Ba2CuTeO6 hosts weakly coupled S=12 spin ladders produced by an orbital ordering of Cu2+. The magnetic susceptibility χ(T) of Ba2CuTeO6 is well described by that expected for isolated spin ladders with exchange coupling of J≈86K but shows a deviation from the expected thermally activated behavior at low temperatures below T∗≈25K. An anomaly in χ(T), indicative of magnetic ordering, is observed at Tmag=16K. No clear signature of long-range ordering, however, is captured so far in NMR 1/T1, specific heat or neutron diffraction measurements at and below Tmag. The marginal magnetic transition, indicative of strong quantum fluctuations, is evidence that Ba2CuTeO6 is in very close proximity to a quantum critical point between magnetically ordered and spin-gapped phases controlled by interladder couplings.

UR - http://www.scopus.com/inward/record.url?scp=85015953077&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85015953077&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.95.104428

DO - 10.1103/PhysRevB.95.104428

M3 - Article

AN - SCOPUS:85015953077

SN - 0163-1829

VL - 95

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

IS - 10

M1 - 104428

ER -

S= 12 quantum critical spin ladders produced by orbital ordering in Ba2CuTeO6

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this