Experimental realization of a quantum breathing pyrochlore antiferromagnet

被引：70

作者：

Kimura, K. ^{[1
]}

Nakatsuji, S. ^{[2
,3
]}

Kimura, T. ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Div Mat Phys, Toyonaka, Osaka 5608531, Japan

[2] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[3] Japan Sci & Technol Agcy JST, PRESTO, Saitama 3320012, Japan

来源：

PHYSICAL REVIEW B | 2014年 / 90卷 / 06期

关键词：

CRYSTAL-STRUCTURE; SPIN LIQUIDS; FIELDS; ORDER; ICE;

D O I：

10.1103/PhysRevB.90.060414

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The synthesis and characterization of a Yb-based material Ba3Yb2Zn5O11 are reported. This material is identified as a model system of a pseudospin-1/2 quantum antiferromagnet on "breathing" pyrochlore lattice characterized by an alternating array of small and large Yb tetrahedra. Despite dominant antiferromagnetic interactions J similar to 7 K, a large amount of magnetic entropy (25%) remains at 0.38 K, indicating that each small Yb tetrahedron forms a unique doubly degenerate singlet state. These results are well described by the Heisenberg pseudospin-1/2 single tetrahedron model.

引用

页数：5

共 32 条

[21] On the synthesis and crystal structure of Ba6Lu4Zn10O22 with [OBa6] octahedra [J].

Rabbow, C ;

MullerBuschbaum, H .

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1996, 622 (01) :100-104

[22] Zero-point entropy in 'spin ice' [J].

Ramirez, AP ;

Hayashi, A ;

Cava, RJ ;

Siddharthan, R ;

Shastry, BS .

NATURE, 1999, 399 (6734) :333-335

[23] Quantum Excitations in Quantum Spin Ice [J].

Ross, Kate A. ;

Savary, Lucile ;

Gaulin, Bruce D. ;

Balents, Leon .

PHYSICAL REVIEW X, 2011, 1 (02) :1-10

[24] ON THE CRYSTAL-STRUCTURE OF BA3IN2ZN5O11 - AN OXOINDATE ZINCATE WITH ZN10O20 AND IN4O16 MACROPOLYHEDRA WITH ZN-2+ IN TETRAHEDRAL COORDINATION BY O-2- [J].

SCHEIKOWSKI, M ;

MULLERBUSCHBAUM, H .

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1993, 619 (03) :559-562

[25] MATRIX ELEMENTS AND OPERATOR EQUIVALENTS CONNECTED WITH THE MAGNETIC PROPERTIES OF RARE EARTH IONS [J].

STEVENS, KWH .

PROCEEDINGS OF THE PHYSICAL SOCIETY OF LONDON SECTION A, 1952, 65 (387) :209-215

[26] OXIDE PYROCHLORES - A REVIEW [J].

SUBRAMANIAN, MA ;

ARAVAMUDAN, G ;

RAO, GVS .

PROGRESS IN SOLID STATE CHEMISTRY, 1983, 15 (02) :55-143

[27] Order by distortion and string modes in pyrochlore antiferromagnets [J].

Tchernyshyov, O ;

Moessner, R ;

Sondhi, SL .

PHYSICAL REVIEW LETTERS, 2002, 88 (06) :67203/1-67203/4

[28] Rods of Neutron Scattering Intensity in Yb2Ti2O7: Compelling Evidence for Significant Anisotropic Exchange in a Magnetic Pyrochlore Oxide [J].

Thompson, Jordan D. ;

McClarty, Paul A. ;

Ronnow, Henrik M. ;

Regnault, Louis P. ;

Sorge, Andreas ;

Gingras, Michel J. P. .

PHYSICAL REVIEW LETTERS, 2011, 106 (18)

[29] Antiferromagnetic quantum spins on the pyrochlore lattice [J].

Tsunetsugu, H .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2001, 70 (03) :640-643

[30]

Tsunetsugu H., 2001, PHYS REV B, V65

← 1 2 3 4 →