Role of spin noise in the detection of nanoscale ensembles of nuclear spins

被引：62

作者：

Degen, C. L. ^{[1
]}

Poggio, M. ^{[1
,2
]}

Mamin, H. J. ^{[1
]}

Rugar, D. ^{[1
]}

机构：

[1] IBM Res Div, Almaden Res Ctr, San Jose, CA 95120 USA

[2] Stanford Univ, Ctr Probing Nanoscale, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 25期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.99.250601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

When probing nuclear spins in materials on the nanometer scale, random fluctuations of the spin polarization will exceed the mean Boltzmann polarization for sample volumes below about (100 nm)(3). In this Letter, we use magnetic resonance force microscopy to observe nuclear spin fluctuations in real time. We show how reproducible measurements of the polarization variance can be obtained by controlling the spin correlation time and rapidly sampling a large number of independent spin configurations. This allows significant improvement in the signal-to-noise ratio for nanometer-scale magnetic resonance imaging.

引用

页数：4

共 18 条

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Abragam A, 1961, PRINCIPLES NUCL MAGN, P133

[2]

BLOCH F, 1946, PHYS REV, V70, P460, DOI 10.1103/PhysRev.70.460

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