QUANTUM INTERFERENCE IS SMALL MAGNETIC PARTICLES

被引：49

作者：

CHUDNOVSKY, EM ^{[1
]}

DIVINCENZO, DP ^{[1
]}

机构：

[1] IBM CORP,DIV RES,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.48.10548

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We consider tunneling of a large spin between nonequivalent wells in the presence of the magnetic field. Using coherent spin states we show that the quenching of tunneling for a half-integer spin, which occurs at H = 0, survives up to a reasonably large field. An experiment is proposed which may allow one to observe this quenching. Oscillation of the tunneling rate on the applied field is suggested.

引用

页码：10548 / 10551

页数：4

共 24 条

[1] OBSERVATION OF MACROSCOPIC SPIN PHENOMENA IN NANOMETER-SCALE MAGNETS [J].

AWSCHALOM, DD ;

MCCORD, MA ;

GRINSTEIN, G .

PHYSICAL REVIEW LETTERS, 1990, 65 (06) :783-786

[2] MACROSCOPIC QUANTUM TUNNELING IN MAGNETIC PROTEINS [J].

AWSCHALOM, DD ;

SMYTH, JF ;

GRINSTEIN, G ;

DIVINCENZO, DP ;

LOSS, D .

PHYSICAL REVIEW LETTERS, 1992, 68 (20) :3092-3095

[3] MACROSCOPIC QUANTUM TUNNELING IN ANTIFERROMAGNETS [J].

BARBARA, B ;

CHUDNOVSKY, EM .

PHYSICS LETTERS A, 1990, 145 (04) :205-208

[4] QUANTAL PHASE-FACTORS ACCOMPANYING ADIABATIC CHANGES [J].

BERRY, MV .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1984, 392 (1802) :45-57

[5] QUANTUM TUNNELLING IN A DISSIPATIVE SYSTEM [J].

CALDEIRA, AO ;

LEGGETT, AJ .

ANNALS OF PHYSICS, 1983, 149 (02) :374-456

[6] QUANTUM TUNNELING OF DOMAIN-WALLS IN FERROMAGNETS [J].

CHUDNOVSKY, EM ;

IGLESIAS, O ;

STAMP, PCE .

PHYSICAL REVIEW B, 1992, 46 (09) :5392-5404

[7] QUANTUM TUNNELING OF MAGNETIZATION IN SMALL FERROMAGNETIC PARTICLES [J].

CHUDNOVSKY, EM ;

GUNTHER, L .

PHYSICAL REVIEW LETTERS, 1988, 60 (08) :661-664

[8] QUANTUM-THEORY OF NUCLEATION IN FERROMAGNETS [J].

CHUDNOVSKY, EM ;

GUNTHER, L .

PHYSICAL REVIEW B, 1988, 37 (16) :9455-9459

[9] EFFECTIVE-ACTION APPROACH TO THE FRUSTRATED HEISENBERG-ANTIFERROMAGNET IN 2 DIMENSIONS [J].

EINARSSON, T ;

JOHANNESSON, H .

PHYSICAL REVIEW B, 1991, 43 (07) :5867-5882

[10] MAGNETIC-FIELD DEPENDENCE OF THE TUNNELING SPLITTING OF QUANTUM SPINS [J].

ENZ, M ;

SCHILLING, R .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1986, 19 (30) :L711-L715

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