Temperature- and Magnetic-Field-Dependent Longitudinal Spin Relaxation in Nitrogen-Vacancy Ensembles in Diamond

被引：315

作者：

Jarmola, A. ^{[1
,2
]}

Acosta, V. M. ^{[1
,3
]}

Jensen, K. ^{[1
]}

Chemerisov, S. ^{[4
]}

Budker, D. ^{[1
,5
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Univ Latvia, Ctr Laser, LV-1586 Riga, Latvia

[3] Hewlett Packard Labs, Palo Alto, CA 94304 USA

[4] Argonne Natl Lab, Argonne, IL 60439 USA

[5] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 19期

关键词：

SOLID-STATE SPIN; N-V CENTERS; CROSS-RELAXATION; QUANTUM REGISTER; ELECTRON-SPIN; DYNAMICS; QUBIT;

D O I：

10.1103/PhysRevLett.108.197601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present an experimental study of the longitudinal electron-spin relaxation time (T-1) of negatively charged nitrogen-vacancy (NV) ensembles in diamond. T-1 was studied as a function of temperature from 5 to 475 K and magnetic field from 0 to 630 G for several samples with various NV and nitrogen concentrations. Our studies reveal three processes responsible for T-1 relaxation. Above room temperature, a two-phonon Raman process dominates; below room temperature, we observe an Orbach-type process with an activation energy of 73(4) meV, which closely matches the local vibrational modes of the NV center. At yet lower temperatures, sample dependent cross-relaxation processes dominate, resulting in temperature independent values of T-1 from milliseconds to minutes. The value of T-1 in this limit depends sensitively on the magnetic field and can be tuned by more than 1 order of magnitude.

引用

页数：5

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