Short-Range Correlations in the Magnetic Ground State of Na4Ir3O8

被引：55

作者：

Dally, Rebecca ^{[1
]}

Hogan, Tom ^{[1
]}

Amato, Alex ^{[2
]}

Luetkens, Hubertus ^{[2
]}

Baines, Chris ^{[2
]}

Rodriguez-Rivera, Jose ^{[3
]}

Graf, Michael J. ^{[1
]}

Wilson, Stephen D. ^{[4
]}

机构：

[1] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA

[2] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland

[3] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[4] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 24期

基金：

美国国家科学基金会;

关键词：

MUON SPIN RELAXATION; DISORDERED MAGNETS;

D O I：

10.1103/PhysRevLett.113.247601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic ground state of the J(eff) = 1/2 hyperkagome lattice in Na4Ir3O8 is explored via combined bulk magnetization, muon spin relaxation, and neutron scattering measurements. A short-range, frozen state comprised of quasistatic moments develops below a characteristic temperature of T-F = 6 K, revealing an inhomogeneous distribution of spins occupying the entirety of the sample volume. Quasistatic, short-range spin correlations persist until at least 20 mK and differ substantially from the nominally dynamic response of a quantum spin liquid. Our data demonstrate that an inhomogeneous magnetic ground state arises in Na4Ir3O8 driven either by disorder inherent to the creation of the hyperkagome lattice itself or stabilized via quantum fluctuations.

引用

页数：5

共 26 条

[1] Heavy-fermion systems studied by mu SR technique [J].