Quantum superposition of high spin states in the single molecule magnet Ni4 -: art. no. 157202

被引：73

作者：

del Barco, E

Kent, AD

Yang, EC

Hendrickson, DN

机构：

[1] NYU, Dept Phys, New York, NY 10003 USA

[2] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 15期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.93.157202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Quantum tunneling of the magnetization in a single molecule magnet has been studied in experiments that combine microwave spectroscopy with high sensitivity magnetic measurements. By monitoring spin-state populations in the presence of microwave radiation, the energy splittings between low lying superpositions of high-spin states of single molecule magnet Ni-4 (S=4) have been measured. Absorption linewidths give an upper bound on the rate of decoherence. Pulsed microwave experiments provide a measure of energy relaxation time, which is found to increase with frequency.

引用

收藏

页码：157202 / 1

页数：4

相关论文

共 18 条

[1] Universal decoherence in solids [J].

Chudnovsky, EM .

PHYSICAL REVIEW LETTERS, 2004, 92 (12) :120405-1

[2]

Coetzee Greig, 2003, PRESS

[3] High-frequency electron paramagnetic resonance investigations of tetranuclear nickel-based single-molecule magnets [J].

Edwards, RS ;

Maccagnano, S ;

Yang, EC ;

Hill, S ;

Wernsdorfer, W ;

Hendrickson, D ;

Christou, G .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (10) :7807-7809

[4] Macroscopic measurement of resonant magnetization tunneling in high-spin molecules [J].

Friedman, JR ;

Sarachik, MP ;

Tejada, J ;

Ziolo, R .

PHYSICAL REVIEW LETTERS, 1996, 76 (20) :3830-3833

[5] Thermally activated resonant magnetization tunneling in molecular magnets: Mn12Ac and others [J].

Garanin, DA ;

Chudnovsky, EM .

PHYSICAL REVIEW B, 1997, 56 (17) :11102-11118

[6] Field tuning of thermally activated magnetic quantum tunnelling in Mn-12-Ac molecules [J].

Hernandez, JM ;

Zhang, XX ;

Luis, F ;

Bartolome, J ;

Tejada, J ;

Ziolo, R .

EUROPHYSICS LETTERS, 1996, 35 (04) :301-306

[7] Quantum coherence in an exchange-coupled dimer of single-molecule magnets [J].

Hill, S ;

Edwards, RS ;

Aliaga-Alcalde, N ;

Christou, G .

SCIENCE, 2003, 302 (5647) :1015-1018

[8] PROPERTIES AND MEASUREMENT OF SCANNING TUNNELING MICROSCOPE FABRICATED FERROMAGNETIC PARTICLE ARRAYS (INVITED) [J].

KENT, AD ;

VONMOLNAR, S ;

GIDER, S ;

AWSCHALOM, DD .

JOURNAL OF APPLIED PHYSICS, 1994, 76 (10) :6656-6660

[9]

Leggett A. J., 1980, PROG THEOR PHYS SUPP, V69, P80

[10] Quantum computing in molecular magnets [J].

Leuenberger, MN ;

Loss, D .

NATURE, 2001, 410 (6830) :789-793