TY  - JOUR
A1  - Horovitz, Baruch
A1  - Henkel, Carsten
T1  - Spin entanglement via scanning tunneling microscope current
JF  - Physical review : B, Condensed matter and materials physics
N2  - We consider a system of two spins under a scanning tunneling microscope bias and derive its master equation. We find that the tunneling elements to the electronic contacts (tip and substrate) generate an exchange interaction between the spins as well as a Dzyaloshinskii-Moriya interaction in the presence of spin-orbit coupling. The tunnel current spectrum then shows additional lines compared to conventional spin-resonance experiments. When the spins have degenerate Larmor frequencies and equal tunneling amplitudes (without spin orbit), there is a dark state with a vanishing decay rate. The coupling to the electronic environment generates significant spin-spin entanglement via the dark state, even if the initial state is nonentangled.
Y1  - 2021
U6  - https://doi.org/10.1103/PhysRevB.104.L081405
SN  - 2469-9950
SN  - 2469-9969
VL  - 104
IS  - 8
PB  - American Physical Society
CY  - Ridge, NY
ER  - 
TY  - JOUR
A1  - Manassen, Yishay
A1  - Jbara, Moamen
A1  - Averbukh, Michael
A1  - Hazan, Zion
A1  - Henkel, Carsten
A1  - Horovitz, Baruch
T1  - Tunnel current noise spectra of spins in individual dimers of molecular radicals
JF  - Physical review : B, Condensed matter and materials physics
N2  - We report the detection of electron spin resonance (ESR) in individual dimers of the stable free radical 2,2,6,6tetramethyl-piperidine-1-oxyl (TEMPO). ESR is measured by the current fluctuations in a scanning tunneling microscope (ESR-STM method). The multipeak power spectra, distinct from macroscopic data, are assigned to dimers having exchange and Dzyaloshinskii-Moriya interactions in the presence of spin-orbit coupling. These interactions are generated in our model by interfering electronic tunneling pathways from tip to sample via the dimer???s two molecules. This is the first demonstration that tunneling via two spins is a valid mechanism of the ESR-STM method.
Y1  - 2022
U6  - https://doi.org/10.1103/PhysRevB.105.235438
SN  - 2469-9950
SN  - 2469-9969
VL  - 105
IS  - 23
PB  - American Physical Society
CY  - College Park
ER  -