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Related Concept Videos

Fermi Level Dynamics01:12

Fermi Level Dynamics

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The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
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Consider a conductor in electrostatic equilibrium. The net electric field inside a conductor vanishes, and extra charges on the conductor reside on its outer surface, regardless of where they originate.
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Crystal Field Theory
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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
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Sub-cycle strong-field tunneling dynamics in solids.

Shidong Yang, Xiwang Liu, Hongdan Zhang

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    |June 11, 2024
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    This summary is machine-generated.

    Nonadiabatic tunneling ionization in solids is explored. Electrons can tunnel away from the Γ point with initial velocity, and tunneling distances are reduced, offering new insights into strong-field physics.

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    Area of Science:

    • Solid-state physics
    • Strong-field physics
    • Quantum dynamics

    Background:

    • Tunneling ionization is key to strong laser-matter interactions.
    • Adiabatic and nonadiabatic tunneling are understood in atoms but not fully in solids.
    • Nonadiabatic tunneling dynamics in solids remain poorly understood.

    Purpose of the Study:

    • Investigate sub-cycle resolved strong-field tunneling dynamics in solids.
    • Compare instantaneous momentum and tunneling distances across Keldysh parameters.
    • Clarify nonadiabatic tunneling phenomena in solid-state systems.

    Main Methods:

    • Utilized a complex saddle-point method for analysis.
    • Examined electron tunneling dynamics with sub-cycle resolution.
    • Varied Keldysh parameters to study tunneling behavior.

    Main Results:

    • Demonstrated possibility of nonadiabatic tunneling ionization away from the Γ point.
    • Observed electrons emerging with nonzero initial velocity in the conduction band.
    • Found reduced tunneling distances compared to quasi-static cases.

    Conclusions:

    • Nonadiabatic tunneling in solids exhibits unique characteristics.
    • Results provide fundamental insights into electron tunneling dynamics.
    • Implications for understanding nonlinear phenomena in solids are significant.