Model for electron spin resonance in STM noise

被引：11

作者：

Caso, Alvaro ^{[1
,2
]}

Horovitz, Baruch ^{[3
]}

Arrachea, Liliana ^{[1
]}

机构：

[1] Univ Buenos Aires, Dept Fis & IFIBA, RA-1428 Buenos Aires, DF, Argentina

[2] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

[3] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel

来源：

PHYSICAL REVIEW B | 2014年 / 89卷 / 07期

基金：

以色列科学基金会;

关键词：

SCANNING-TUNNELING-MICROSCOPY; SHOT-NOISE; MOLECULES; CONTACT; SILICON; SI(111); SYSTEM; POINT;

D O I：

10.1103/PhysRevB.89.075412

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We propose a model to account for the observed ESR-like signal at the Larmor frequency in the current noise scanning tunnel microscope (STM) experiments identifying spin centers on various substrates. The theoretical understanding of this phenomenon, which allows for single spin detection on surfaces at room temperature, is not settled for the experimentally relevant case that the tip and substrate are not spin polarized. Our model is based on a direct tip-substrate tunneling in parallel with a current flowing via the spin states. We find a sharp signal at the Larmor frequency even at high temperatures, in good agreement with experimental data. We also evaluate the noise in presence of an ac field near resonance and predict splitting of the signal into a Mollow triplet.

引用

页数：8

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