Detecting Larmor Precession of a Single Spin with a Spin-Polarized Tunneling Current
GUO Xiao-Dong, DONG Li, GUO Yang, SHAN Xin-Yan, ZHAO Ji-Min, LU Xing-Hua**
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190
Abstract ：Detection and manipulation of a single spin is essential for spin-based quantum information and computation. We propose an experimental method to detect the Larmor precession of a single spin with a spin-polarized tunneling current. The calculation demonstrates that the modulation of the tunneling current is significantly increased as compared with the non-spin-polarized current. The signal-to-noise ratio in the current power spectrum will be dramatically improved by this method. The longitudinal relaxation time can be measured by temporal control of spin orientation with pulses of magnetic field or radio frequency electromagnetic wave, while the transverse relaxation time can be derived by analyzing the resonant peak profile with a spectrum analyzer. Such ability in characterizing spin relaxation is of particular interest in providing insights into the coherence/decoherence of a single spin.
收稿日期: 2012-09-29
出版日期: 2013-03-04
:
76.30.-v
(Electron paramagnetic resonance and relaxation)
07.79.Cz
(Scanning tunneling microscopes)
76.30.Da
(Ions and impurities: general)
[1]
.
[2]
Indrajeet Mishra1,2** , Ram Kripal1** , Sanjay Misra. Electron Paramagnetic Resonance of Mn2+ -Doped Cadmium Formate Dihydrate Single Crystals
[3]
Prashant Dwivedi;Ram Kripal;Santwana Shukla. Electron Paramagnetic Resonance and Optical Absorption of VO2+ Doped Bis (glycinato) Mg (II) Monohydrate Single Crystals
[4]
Ram Kripal;Santwana Shukla. C4v Symmetry Crystal Field and Ground State Wavefunction of the VO2+ Ion
[5]
G. G. Fedoruk;O. N. Poklonskaya. On Room-Temperature Inversion of EPR Signals of P1 Centre in Synthetic Diamond
[6]
Kheamrutai Thamaphat;Pichet Limsuwan;Siwaporn Meejoo. ESR Spectrometer as a Possible Tool for Rapid Analysis of Cane Sugar Purity
[7]
N. A. Poklonski;N. M. Lapchuk;A. V. Khomich;LU Fan-Xiu;TANG Wei-Zhong;V. G. Ralchenko;I. I. Vlasov;M. V. Chukichev;Sambuu Munkhtsetseg;. Nitrogen-Doped Chemical Vapour Deposited Diamond: a New Material for Room-Temperature Solid State Maser
[8]
YUAN Song-Liu;CHEN Wei; ZHAO Li-Feng;DOYANANDA Debnath;MIAO Ju-Hong;WANG Yong-Qiang;YUAN Li;SHANG
Jing-Lin;XIAO Li-Xia;CAO Heng;XIA Zheng-Cai. Origin of the Downturn in Inverse Susceptibility Observed above the Curie Temperature in Perovskite Manganites
[9]
YUAN Song-Liu;ZHONG Qiang-Hua;DOYANANDA Debnath;CHEN Wei;ZHAO Li-Feng;MIAO JU-Hong;CAO Heng; LIU Sheng;XIA Zheng-Cai. Unusual Transport Properties near the Insulator--Metal Transition in Colossal Magnetoresistive Manganites
[10]
YUAN Song-Liu;LIU Sheng;CAO Heng;SHANG Jing-Lin;DONG Bo;XIA Zheng-Cai;LI Jian-Qing. Evidence of the Griffiths Phase in Doped Manganites Studied by Electron Paramagnetic Resonance Measurements
[11]
PENG Zhen-Sheng;LIU Ning;CAI Zhi-Rang;GUO Huan-Yin;TONG Wei;ZHANG Chang-Jing;ZHANG Yu-Heng. Influence of Gd Doping at A Site upon the Magnetic Structure of La0.7-x Gdx Sr0.3 MnO3 Systems
[12]
ZHANG Hai-yan;WANG Deng-yu;XUE Xin-min;HE Yan-yang;WU Ming-mei;PENG Shao-qi. Room Temperature Electron Spin Resonance of the Purified Carbon Nanotubes Produced in Different Helium Pressures
2013, Vol. 30 
