Nuclear spin temperature reversal via continuous radio-frequency driving
Nuclear spin temperature reversal via continuous radio-frequency driving
复制标题
通过连续射频驱动实现核自旋温度逆转
DOI：
10.1103/physrevb.103.085205
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发表时间：
2021
影响因子：
3.7
通讯作者：
Meriles, Carlos A.
中科院分区：
文献类型：
--
作者：
Zangara, Pablo R.;Pagliero, Daniela;Ajoy, Ashok;Acosta, Rodolfo H.;Reimer, Jeffrey A.;Meriles, Carlos A.
金刚石色心的光自旋抽运作为室温下动态核极化的研究平台，目前引起了广泛的兴趣，但是在宿主晶体中产生和传输极化的机制仍然部分被理解。在这里，我们研究了连续射频（RF）激励对光学照明产生的核磁化的影响。在远离核拉莫尔频率的射频激发下，当驱动足够强时，我们看到测量到的核自旋信号的磁场依赖符号反转，这是一个反直觉的发现，立即指向非平凡的自旋动力学。在分析和数值模拟的帮助下，我们表明我们的观察表明了一种改进形式的固体效应，通过涉及一个（或多个）原子核和两个（或更多）电子自旋的混合跃迁的驱动，从微波向下转换到射频范围。我们的研究结果为利用超精细耦合作为一种手段来获取其他禁止的带内跃迁，从而操纵多电子自旋系统提供了有趣的机会。
Optical spin pumping of color centers in diamond is presently attracting broad interest as a platform for dynamic nuclear polarization at room temperature, but the mechanisms involved in the generation and transport of polarization within the host crystal are still partly understood. Here we investigate the impact of continuous radio-frequency (RF) excitation on the generation of nuclear magnetization produced by optical illumination. In the presence of RF excitation far removed from the nuclear Larmor frequency, we witness a magnetic-field-dependent sign reversal of the measured nuclear spin signal when the drive is sufficiently strong, a counterintuitive finding that immediately points to nontrivial spin dynamics. With the help of analytical and numerical modeling, we show our observations indicate a modified form of solid effect, down-converted from the microwave to the radio-frequency range through the driving of hybrid transitions involving one (or more) nuclei and two (or more) electron spins. Our results open intriguing opportunities for the manipulation of many-electron spin systems by exploiting hyperfine couplings as a means to access otherwise forbidden intraband transitions.
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影响因子：
3.7
作者：
Fischer, Ran;Jarmola, Andrey;Budker, Dmitry
通讯作者：
Budker, Dmitry
金刚石纳米晶体中暗自旋冷却的方法。
影响因子：
17.1
作者：
A. Laraoui;C. Meriles
通讯作者：
C. Meriles
影响因子：
3.5
作者：
A. Abragam;M. Goldman;A. Redfield
通讯作者：
A. Abragam;M. Goldman;A. Redfield
影响因子：
2.2
作者：
Griffin, Robert G.;Swager, Timothy M.;Temkin, Richard J.
通讯作者：
Temkin, Richard J.
影响因子：
10.8
作者：
Abrams, Daniel;Trusheim, Matthew E.;Meriles, Carlos A.
通讯作者：
Meriles, Carlos A.