Cui Ming-Hui, Lu Yi-Ming, Wang Jia, Ouyang Zhongwen, Wang Zhenxing, Shao Chongyun, Song You
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China.
Department Wuhan National High Magnetic Field Center & School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China.
Chemistry. 2024 Nov 26;30(66):e202402660. doi: 10.1002/chem.202402660. Epub 2024 Oct 23.
Electron spin qubits are becoming an important research direction in the field of quantum computing and information storage. However, the quantum decoherence has seriously hindered the development of this field. So far, few qubits exhibit long phase memory time (T), and even fewer qubits that can reach room temperature. Some reports show that the coherence times of radicals are generally long, so radicals may be the preferred spin carriers for qubits. Here, we demonstrate the qubit properties of a photogenerated radical (1 a) based on 2,4,6-Tri(4-pyridyl)-1,3,5-triazine (tpt, 1). More importantly, the photogenerated radical is a spin self-diluting complex, which the dilution is generally used in the investigation of qubits to reduce the interference of environment on qubits in order to overcome the decoherence of qubits. It is surprised that radical tpt has a stable T=1.1 μs above 20 K, even keep it to room temperature. In addition, the tpt-film prepared by the vacuum evaporation is significantly increase the T and T at low temperature.
电子自旋量子比特正成为量子计算和信息存储领域的一个重要研究方向。然而，量子退相干严重阻碍了该领域的发展。到目前为止，很少有量子比特表现出长的相位记忆时间（T），能达到室温的量子比特更少。一些报道表明自由基的相干时间通常较长，因此自由基可能是量子比特首选的自旋载体。在此，我们展示了基于2,4,6 - 三（4 - 吡啶基）- 1,3,5 - 三嗪（tpt，1）的光生自由基（1 a）的量子比特特性。更重要的是，光生自由基是一种自旋自稀释配合物，稀释通常用于量子比特的研究中，以减少环境对量子比特的干扰，从而克服量子比特的退相干。令人惊讶的是，自由基tpt在20 K以上具有稳定的T = 1.1微秒，甚至能保持到室温。此外，通过真空蒸发制备的tpt薄膜在低温下显著提高了T和T。
