DISSIPATIVE QUANTUM TUNNELING OF DEFECTS IN A MESOSCOPIC METAL

被引：5

作者：

BIRGE, NO ^{[1
]}

CHUN, K ^{[1
]}

ALERS, GB ^{[1
]}

GOLDING, B ^{[1
]}

机构：

[1] MICHIGAN STATE UNIV,CTR FUNDAMENTAL MAT RES,E LANSING,MI 48824

来源：

PHYSICA B | 1994年 / 194卷

关键词：

D O I：

10.1016/0921-4526(94)90820-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have studied the dynamics of single bistable defects in sub-micron Bi wires at temperatures 0.1 - 2 K. The defect motions can cause large changes in the sample resistance via universal conductance fluctuations. The dynamics are due to the defect particle, coupled to the electron bath, tunneling in a double-well potential with asymmetry epsilon. We clearly observe tunneling rates that increase as the temperature is lowered when kT >> epsilon, as predicted by the theory of dissipative quantum tunneling. Fits of the theory to the data yield a value of the defect-electron bath coupling constant alpha, that is defect-specific.

引用

页码：981 / 982

页数：2

共 13 条

[1]

ALTSHULER BL, 1985, JETP LETT, V42, P363

[2] SENSITIVITY OF THE CONDUCTANCE OF A DISORDERED METAL TO THE MOTION OF A SINGLE ATOM - IMPLICATIONS FOR 1/F NOISE [J].

FENG, SC ;

LEE, PA ;

STONE, AD .

PHYSICAL REVIEW LETTERS, 1986, 56 (18) :1960-1963

[3] DISSIPATIVE QUANTUM TUNNELING IN A BIASED DOUBLE-WELL SYSTEM AT FINITE TEMPERATURES [J].

FISHER, MPA ;

DORSEY, AT .

PHYSICAL REVIEW LETTERS, 1985, 54 (15) :1609-1612

[4] DISSIPATIVE QUANTUM TUNNELING OF A SINGLE MICROSCOPIC DEFECT IN A MESOSCOPIC METAL [J].

GOLDING, B ;

ZIMMERMAN, NM ;

COPPERSMITH, SN .

PHYSICAL REVIEW LETTERS, 1992, 68 (07) :998-1001

[5] QUANTUM TUNNELING RATES FOR ASYMMETRIC DOUBLE-WELL SYSTEMS WITH OHMIC DISSIPATION [J].

GRABERT, H ;

WEISS, U .

PHYSICAL REVIEW LETTERS, 1985, 54 (15) :1605-1608

[6]

HEIDEMANN A, 1987, QUANTUM ASPECTS MOL

[7]

KAGAN Y, 1993, QUANTUM TUNNELING CO

[8] DIFFUSION OF LIGHT INTERSTITIALS IN METALS [J].

KONDO, J .

PHYSICA B & C, 1984, 125 (03) :279-285

[9] ADIABATIC VS NON-ADIABATIC STATE OF A HEAVY PARTICLE IN A METAL [J].

KONDO, J .

PHYSICA B & C, 1984, 124 (01) :25-34

[10] DIFFUSION OF LIGHT INTERSTITIALS IN METALS [J].

KONDO, J .

PHYSICA B & C, 1984, 126 (1-3) :377-384

← 1 2 →