Magnetic-field induced quantum phase transition and critical behavior in a gapped spin system TlCuCl3

被引：5

作者：

Yamada, F. ^{[1
]}

Ono, T.

Fujisawa, M.

Tanaka, H.

Sakakibara, T.

机构：

[1] Tokyo Inst Technol, Dept Phys, Kashiwa, Chiba 1528551, Japan

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

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 310卷 / 02期

关键词：

TlCuCl3; spin gap; field-induced magnetic ordering; magnon; Bose-Einstein condensation;

D O I：

10.1016/j.jmmm.2006.10.372

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetization measurements were performed on TlCuCl3 with gapped ground state. The critical density and the magnetic phase diagram were obtained. The interacting constant was obtained as U/k(B) = 313 K. The experimental phase boundary for T < 5 K agrees perfectly with the magnon BEC theory based on the Hartree-Fock approximation with realistic dispersion relations and U/k(B) 320 K. 3 The exponent phi obtained with all the data points for T < 5 K is phi = 1.99, which is somewhat larger than theoretical exponent phi(BEC) = 3/2. However, it was found that the exponent converges at phi(BEC) =3/2 with decreasing fitting window. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1352 / 1354

页数：3

共 8 条

[1] Quantum critical point of the XY model and condensation of field-induced quasiparticles in dimer compounds [J].

Kawashima, N .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2004, 73 (12) :3219-3222

[2] Bose-Einstein condensation of magnons in TlCuCl3:: Phase diagram and specific heat from a self-consistent Hartree-Fock calculation with a realistic dispersion relation [J].

Misguich, G ;

Oshikawa, M .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2004, 73 (12) :3429-3434

[3] Bose-Einstein condensation of dilute magnons in TlCuCl3 [J].

Nikuni, T ;

Oshikawa, M ;

Oosawa, A ;

Tanaka, H .

PHYSICAL REVIEW LETTERS, 2000, 84 (25) :5868-5871

[4] Universal scaling at field-induced magnetic phase transitions [J].

Nohadani, O ;

Wessel, S ;

Normand, B ;

Haas, S .

PHYSICAL REVIEW B, 2004, 69 (22) :220402-1

[5] Field-induced three-dimensional magnetic ordering in the spin-gap system TlCuCl3 [J].

Oosawa, A ;

Ishii, M ;

Tanaka, H .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1999, 11 (01) :265-271

[6] Specific heat study of the field-induced magnetic ordering in the spin-gap system TlCuCl3 -: art. no. 134416 [J].

Oosawa, A ;

Katori, HA ;

Tanaka, H .

PHYSICAL REVIEW B, 2001, 63 (13)

[7] FARADAY FORCE MAGNETOMETER FOR HIGH-SENSITIVITY MAGNETIZATION MEASUREMENTS AT VERY-LOW TEMPERATURES AND HIGH FIELDS [J].

SAKAKIBARA, T ;

MITAMURA, H ;

TAYAMA, T ;

AMITSUKA, H .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1994, 33 (9A) :5067-5072

[8] High-field magnetization processes of double spin chain systems KCuCl3 and TlCuCl3 [J].

Shiramura, W ;

Takatsu, K ;

Tanaka, H ;

Kamishima, K ;

Takahashi, M ;

Mitamura, H ;

Goto, T .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1997, 66 (07) :1900-1903

← 1 →