Strong Interaction of Slow Electrons with Near-Field Light Visited from First Principles

We review recent advances in the theory of strong-interaction effects and final-state interaction in hadronic weak decays of heavy mesons. In the heavy-quark limit, the amplitudes for most nonleptonic, two-body B decays can be calculated from first principles and expressed in terms of semileptonic form factors and light-cone distribution amplitudes. We summarize the main features of this novel QCD factorization and discuss its phenomenological applications to the charmless decays B→π K and B→ππ.

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First-Principles Method to Study Near-Field Radiative Heat Transfer

Physical Review Applied ◽

10.1103/physrevapplied.14.024080 ◽

2020 ◽

Vol 14 (2) ◽

Author(s):

Tao Zhu ◽

Zu-Quan Zhang ◽

Zhibin Gao ◽

Jian-Sheng Wang

Keyword(s):

Heat Transfer ◽

Radiative Heat Transfer ◽

First Principles ◽

Radiative Heat ◽

Near Field ◽

First Principles Method

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Generalized first-principles method to study near-field heat transfer mediated by Coulomb interaction

Physical Review B ◽

10.1103/physrevb.104.l121409 ◽

2021 ◽

Vol 104 (12) ◽

Author(s):

Tao Zhu ◽

Jian-Sheng Wang

Keyword(s):

Heat Transfer ◽

Coulomb Interaction ◽

First Principles ◽

Near Field ◽

First Principles Method

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Near-field correction in the first-principles calculations by the exact two-center expansion for the inverse of the distance

Journal of Physics Condensed Matter ◽

10.1088/0953-8984/27/48/485201 ◽

2015 ◽

Vol 27 (48) ◽

pp. 485201 ◽

Cited By ~ 1

Author(s):

M Ogura ◽

C Zecha ◽

M Offenberger ◽

H Ebert ◽

H Akai

Keyword(s):

First Principles ◽

Near Field ◽

First Principles Calculations

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Half-Metallic Ferromagnetism in Chalcopyrite (AlGaMn)P2Alloys

Advances in Condensed Matter Physics ◽

10.1155/2015/706957 ◽

2015 ◽

Vol 2015 ◽

pp. 1-7

Author(s):

Byung-Sub Kang ◽

Kwang-Pyo Chae ◽

Haeng-Ki Lee

Keyword(s):

Magnetic Properties ◽

Strong Interaction ◽

Magnetic Moment ◽

First Principles ◽

First Principles Calculations ◽

Half Metallic ◽

Spin Polarized ◽

Mn Doped ◽

Metallic Ferromagnetism ◽

Half Metallic Ferromagnetism

We studied the electronic and magnetic properties of (Al1−yMny)GaP2(Ga-rich) and Al(Ga1−yMny)P2(Al-rich) withy = 0.03125, 0.0625, 0.09375, and 0.125 by using the first-principles calculations. The ferromagnetic Mn-doped AlGaP2chalcopyrite is the most energetically favorable one. The spin polarized Al(GaMn)P2state (Al-rich system) is more stable than spin polarized (AlMn)GaP2state (Ga-rich) with the magnetic moment of 3.8 μB/Mn. The Mn-doped AlGaP2yields strong half-metallic ground states. The states of host Al, Ga, or P atoms at the Fermi level are mainly a P-3pcharacter, which mediates a strong interaction between the Mn-3dand P-3pstates.

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Near-field scanning optical microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100144644 ◽

1986 ◽

Vol 44 ◽

pp. 642-643

Author(s):

E. Betzig ◽

A. Harootunian ◽

M. Isaacson ◽

A. Lewis

Keyword(s):

Near Field ◽

Optical Microscope ◽

Visible Radiation ◽

Field Methods ◽

Optical Elements ◽

Optical Region ◽

Order Of Magnitude ◽

Nondestructive Imaging ◽

Scanning Optical Microscopy ◽

Near Field Scanning

In general, conventional methods of optical imaging are limited in spatial resolution by either the wavelength of the radiation used or by the aberrations of the optical elements. This is true whether one uses a scanning probe or a fixed beam method. The reason for the wavelength limit of resolution is due to the far field methods of producing or detecting the radiation. If one resorts to restricting our probes to the near field optical region, then the possibility exists of obtaining spatial resolutions more than an order of magnitude smaller than the optical wavelength of the radiation used. In this paper, we will describe the principles underlying such "near field" imaging and present some preliminary results from a near field scanning optical microscope (NS0M) that uses visible radiation and is capable of resolutions comparable to an SEM. The advantage of such a technique is the possibility of completely nondestructive imaging in air at spatial resolutions of about 50nm.

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