25-29 January 2019
US/Pacific timezone

Spontaneous spin-chain fluctuation observed with coherent x-ray scattering

27 Jan 2019, 15:00
Building 66- Auditorium (LBL-Hill)

Building 66- Auditorium


Lawrence Berkeley National Lab Berkeley, California
Condensed matter applications Condensed Matter I


Xiaoqian Chen (Lawrence Berkeley National Laboratory)


As we explore new materials harboring entangled quantum states, an efficient probe for their detection is necessary. Coherent x-rays are a direct probe for equilibrium and nonequilibrium dynamics that can simultaneously measure a large number of particles. In my talk, I will use our recent work on dipolar-coupled artificial spin lattices (ASL) and explore the possible route to use coherent x-rays as a probe for entangled spintronic system. Dipolar-coupled systems are receiving considerable interest lately due to their possible application to quantum storage device and quantum computing. However, their collective dynamics in the vicinity of phase transitions is still an under-explored area. We studied magnetic dynamics in ASL using coherent soft x-rays. Our analysis revealed spontaneous nucleation and annihilation of spin-chains with a 3 ms fluctuation time.

Primary author

Xiaoqian Chen (Lawrence Berkeley National Laboratory)


Prof. J. Todd Hastings (University of Kentucky) Dr Sujoy Roy (Lawrence Berkeley National Laboratory)

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