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Updated: Aug 29, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
Quantum dynamics of atomic magnets: cotunneling and dipolar-biased tunneling
R Giraud1, A M Tkachuk, B Barbara
1Laboratoire de Magnétisme Louis Néel, CNRS, BP 166, 38042 Grenoble CEDEX-09, France.
Abstract:
Multispin tunneling cross relaxations in an ensemble of weakly coupled Ho3+ ions, mediated by weak anisotropic dipolar interactions, can be evidenced by ac-susceptibility measurements in a high temperature regime. Based on a four-body representation, including the rare-earth nuclear spin, two-ion tunneling mechanisms can be attributed to both dipolar-biased tunneling and cotunneling processes. The coreversal involving entangled pairs of magnetic moments is discussed with a particular emphasis, giving new evidence to elucidate the many-body quantum dynamics in dipolar spin glasses.
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