Journal of Applied Physics

Journal of Applied Physics Exploring the underlying physics of modern technology, Journal of Applied Physics publishes significant new results in applied physics. http://jap.aip.org

Journal of Applied Physics is the American Institute of Physics' (AIP) archival journal for significant new results in applied physics; content is published online daily, collected into two online and printed issues per month (24 issues per year). The journal publishes articles that emphasize understanding of the physics underlying modern technology, but distinguished from technology on the one si

Journal of Applied Physics is the American Institute of Physics' (AIP) archival journal for significant new results in applied physics; content is published online daily, collected into two online and printed issues per month (24 issues per year). The journal publishes articles that emphasize understanding of the physics underlying modern technology, but distinguished from technology on the one si

Have you ever felt your world is upside-down or that you are in the wrong place or in a hole? It definitely affects your...
06/09/2021
Magnetism in curved geometries

Have you ever felt your world is upside-down or that you are in the wrong place or in a hole? It definitely affects your perception and exchange with peers! Electrons in condensed matter feel so, too.

Curvature impacts physical properties across multiple length scales, ranging from the macroscopic scale, where the shape and size vary drastically with the curvature, to the nanoscale at interfaces...

TLM measurements under variable illumination demonstrate that injection strongly impacts contact resistivity and yield n...
05/31/2021
Advanced method for electrical characterization of carrier-selective passivating contacts using transfer-length-method measurements under variable illumination

TLM measurements under variable illumination demonstrate that injection strongly impacts contact resistivity and yield new insights to investigate electrical transport losses in solar cells.

CSEM

Carrier-selective passivating contacts have been demonstrated to be crucial to reach the practical efficiency limit of single junction, crystalline silicon (c-Si) based solar cells. Yet, the electr...

A radical approach to organic light-emitting diodes by using doublet-spin states: highly efficient red and infrared emis...
05/21/2021
Efficient light-emitting diodes from organic radicals with doublet emission

A radical approach to organic light-emitting diodes by using doublet-spin states: highly efficient red and infrared emission, current challenges and future opportunities.

Swansea University

Organic light-emitting diodes (OLEDs) with doublet-spin radical emitters have emerged as a new route to efficient display technologies. In contrast to standard organic semiconductors, radical mater...

The author provides a pedagogical introduction to theoretical and experimental advances in the study of magnonics in col...
05/18/2021
Magnonics in collinear magnetic insulating systems

The author provides a pedagogical introduction to theoretical and experimental advances in the study of magnonics in collinear magnetic insulating systems.

Boston College

In the last decades, collinear magnetic insulating systems have emerged as promising energy-saving information carriers. Their elementary collective spin excitations, i.e., magnons, can propagate f...

We explore the scalability of the data capacity of atomic radio receivers in a single-input-multi-output (SIMO) configur...
04/29/2021
Data capacity scaling of a distributed Rydberg atomic receiver array

We explore the scalability of the data capacity of atomic radio receivers in a single-input-multi-output (SIMO) configuration, which is a first building block of a multi-input-multi-output (MIMO) communication architecture.

Quantum Science Otago
Sciences at University of Otago
University of Otago

The data transfer capacity of a communication channel is limited by the Shannon–Hartley theorem and scales as log 2 ( 1 + SNR ) for a single channel with a given power signal-to-noise ratio (SNR). ...

The tutorial covers conventional and emerging characterization techniques of colloidal quantum dot materials and solar c...
04/26/2021
Advanced characterization methods of carrier transport in quantum dot photovoltaic solar cells

The tutorial covers conventional and emerging characterization techniques of colloidal quantum dot materials and solar cells currently under intense development as important green energy devices toward a cleaner environment.

Solution-processed colloidal quantum dot (CQD) solar cells are lightweight, flexible, inexpensive, and can be spray-coated on various substrates. However, their power conversion efficiency is still...

Using honeycomb ferromagnet as a prototypical platform, the Authors pedagogically demonstrate how to compute the magnon ...
04/22/2021
Topological magnonics

Using honeycomb ferromagnet as a prototypical platform, the Authors pedagogically demonstrate how to compute the magnon spectra and the topological invariants characterizing the magnon band topology.

Hunan University

Spin waves, whose quanta are called magnons, are propagating excitations of magnetic materials. Magnonics is an emerging field of modern condensed matter physics that aims to study and utilize the ...

The amorphization in superhard boron carbide can be mitigated to improve ductility in the material by employing several ...
04/16/2021
Mitigating the formation of amorphous shear band in boron carbide

The amorphization in superhard boron carbide can be mitigated to improve ductility in the material by employing several strategies such as grain boundary engineering and microalloying.

Boron carbide is super-strong and has many important engineering applications such as body armor and cutting tools. However, the extended applications of boron carbide have been limited by its low ...

This study proposes an easily realizable physical system for tunable beam steering in air via exploring the new idea of ...
04/12/2021
Origami inspired phononic structure with metamaterial inclusions for tunable angular wave steering

This study proposes an easily realizable physical system for tunable beam steering in air via exploring the new idea of combining origami phononic structure with metamaterial inclusions.

Mechanical Engineering- University of Michigan

The ability to create directional sound beams is fundamental to acoustic sensing. Traditionally, acoustic beams are most commonly produced by phased arrays, which increase the cost and complexity o...

Parity-time symmetry breaking enabled coherent perfect absorber-lasers, capable of detecting extremely tiny perturbation...
04/01/2021
Enhanced acoustic pressure sensors based on coherent perfect absorber-laser effect

Parity-time symmetry breaking enabled coherent perfect absorber-lasers, capable of detecting extremely tiny perturbations, shows potential in future sensitive and robust acoustic sensors.

KAUST Official

Lasing is a well-established field in optics with several applications. Yet, having lasing or huge amplification in other wave systems remains an elusive goal. Here, we utilize the concept of coher...

Experimental and simulation analysis of the operation of a “flux control” HDD write head, a newly proposed technology th...
03/11/2021
Magnetization dynamics of a flux control device fabricated in the write gap of a hard-disk-drive write head for high-density recording

Experimental and simulation analysis of the operation of a “flux control” HDD write head, a newly proposed technology that utilizes a spintronic device to increase the recording density.

The design concept of microwave-assisted magnetic recording (MAMR) using the flux control (FC) effect has been proposed as a technology for hard disk drives (HDDs). In this type of MAMR, the magnet...

Transmission electron microscopy was used to do a thorough characterization of structure and local chemical variations i...
03/08/2021
Epitaxial (100), (110), and (111) BaTiO3 films on SrTiO3 substrates—A transmission electron microscopy study

Transmission electron microscopy was used to do a thorough characterization of structure and local chemical variations in three differently oriented BaTiO3 films deposited on SrTiO3 substrates by chemical solution deposition.

NTNU - Norwegian University of Science and Technology

Chemical solution deposition (CSD) is a versatile method to fabricate oxide films. Here, the structure and local variations in the chemical composition of BaTiO 3 (BTO) films prepared by CSD on (10...

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💥💥💥💥 WHY THE MODERN LIGHT SPEED C “MEASURES” ARE IN FACT PROPOSITIONS AS THE OLD ONES : they propose that the light speed C is C=f*λ (hence : light speed = wave length * frequency). BUT in the electromagnetic spectrum the values of those wave lengths and frequencies are very statistic and they are proposed in fact).
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🌟🌟🌟🌟 COLD - HEAT AND ARROW OF THE TIME Cold is the immobility of the particles while heat is their motion. Reasonably, the equilibrium-BALANCE state is neither cold (entropic thermal death) nor heat, but an intermediate state (which proves fluid the typical thermodynamic conception of thermal death that studies only isolated systems and is not a universal view). 🌟Thus the balance Dynamic is stability in motion (and not an icy inertia stability just by itself and not a fluid motion just by itself). The authentic transition is Dynamic and not a sequence of lonely frozen moments. 🌟🌟Also it is known that the natural processes are reversible and the equations can be solved vice versa : the opposite way. Thus there would be no phenomenological Arrow of time, that is, there would be no course from the past to the future ((as Stephen Hawking once falsely argued - later recognizing this theory as a blunder - arguing on the basis that one day time could pass and vice versa, from the future to the past so first we would ..... die and then we would ..... be born. Of course this is a mistake))). 🌟The reason that there is a phenomenological time arrow (even in illusory contexts) is that things operate under the synthetical Dynamic Prism of a Higher Phenomenological state itself that is above the typical fluid reversible processes that compose it. Being a Complete Kinematic, it is the concurrent Complete Dynamic Composition above the position - opposition, action-reaction and such other phases.
🌟🌟🌟🌟 WHY THE ACTION-REACTION RELATIONSHIP IS A DYNAMIC MORE COMPLEX THAN THE TYPICAL NEWTONS FRAMEWORK : leaning somewhere vise versa , the harder we push, the more we are pushed back. (According to Newton, action and reaction are said to be "equal" and the body with the smallest inertial mass moves back). But if we push too hard, the other body moves back. So here giving an increasingly strong action, first we reduce our total inertia by retreating, while later we increase it by moving forward something that is contradictory and thus refers to a more complex Dynamic than a typical action reaction equality. Essentially all these quantities (inertia, action, reaction, etc. are fluid.
🌟🌟🌟🌟 FINAL COMMENTS ON ACTION AND '' REACTION '' : I am not saying that there is no reaction to action. I say (based on what has been quoted in the previous post) that the all (Hegelian type) Dynamic is more complex than the typical Newtonian view of a formal action-reaction"equality". For example, based on the resultant of forces principles, when two forces are equal and opposite no body is pushed backwards, even if the 2 bodies have unequal mass. As we said here, to say that the force is zeroed is not really correct because there is Dynamic pressure here, so the F = m*a (force-mass*acceleration) is undermined). 🌟🌟 But even if one insists that here the force is zeroed, an "equality" of reaction action here should also lead to a zero result without final repulsion, which according to Newton does not apply because he claims that (in the action reaction equality) the body with the smallest mass will be repelled. So serious gaps and contradictions arise. 🌟🌟 Furthermore: the fact that a body that we push resists, indicates a reaction and not just difficulty in moving. Such a reaction flirts with metaphysics (and with the principle of Mach - communication of distant masses) because the other body has no formal reason to react, while the energy we give it by acting, has no reason to turn and return as equal reaction. SO that the "other" body is as if it is informed reflectively) about our action within the framework of a Higher Collective dimension of a Union type. (Higher Self).
🌟🌟🌟🌟 HEGEL, NEWΤΟΝ, TAΟΙSM In Hegel and Taoism, the opposites (position-opposition, yin yang) create a superior harmonized unity and composition on a supreme level. The end result is caused under this synthetic prism. From an ontological point of view, this view is the best, without this meaning that we agree everywhere with Hegel or Taoism. Contrary, according to Newton's more technical conception, the opposites (action-reaction) cause a "zero-sum". For example, in Newton, if we push a body of smaller mass than ours in the empty space, the action and the reaction are equal and compensated and the body with the smallest inertial mass goes backwards. --- 🌟🌟🌟🌟 However the "equality" of reaction action should lead to their absolute compensation and thus no body would be pushed backwards. (In the resultant of forces indeed, it is known that if two forces are equal and opposite, zero result is caused and there is no impulse). --- 🌟🌟 Furthermore, if we push a body of equal mass with us in empty space and we push ourselve the same backwards, it is us that push ourselves backwards and it does not prove to be an equal reaction of the other body here. --- 🌟🌟 Also, suppose that by acting we push a large truck on the road and that later it pushes us with the same action. (The slower the truck moves, the less action it gives us). Here in both cases the action and the reaction are equal. But in the first case we are not pushed backwards, while in the second we are (even if we add more weights to ourselves so that we are as unshakeable as in the first case). So here it seems that the whole issue is more complex.
🌟🌟🌟🌟 PHILOSOPHICAL ERRORS AND THE BALANCED CONDITION : In Physics the Fundamental measure is the Force. It is made by length, mass, and time. The meaning of life is self-improvement, that is, to study the Force, its ways and the mystery of its exact texture and tobe in peace with ourselves in a level of collective self-confidence. In my opinion one of the best philosophers was .......... Bruce Lee : when one reads a book of his that I have, he will be impressed. He does not stutter like most philosophers but he speaks simply and simply. He believes in a sphere of non relativity above the dualism of the conflict and above the yin and yang and above the fluid and illusory phenomena. He believes that global pace is Stability in Movement. He also believes in a Higher Self of a unifying and collective type, that is, he believes in a kind of Form-persona, which, however, in Eastern philosophies is more impersonal than in the great religions that believe to a personal God. In general, a strict inertia point although it is used by science in many cases instrumentally) in fact is a distorted situation. It was created as follows: Since the ancient religions were naturally pagan, the old Jewish concept of Moses was somewhat oriented towards one God who was outside and above nature-universe. This was good from one point of view but not that good from another. It gradually lead the great religions, for example the early Christian societies, to some unreal practices and big mistakes that the Church Fathers later recognized by grounding things more and making them more kinematic although they did not put the universe-nature as God). For example, the early inertial stylism-columnism had created morbid extremes. For example, some ascetics stood (unwashed and fasting) motionless for many years at the top of a tall pillar, thinking that by torturing themselves they would know God that way. As we said, the Church Fathers later corrected those mistakes as much as they could. Modern Judaism, for its part, also made errors , gradually moved rather away from the Moses view through the Talmud and the Kabbalah, and oriented itself to a rather alchemical nature worship where the only God is the universe-nature and to the contradictory cituation of a supposedly Apollonian order point that contradicts with its opposite hence the the Dionysian wave chaos (by leading the one to another) in a fragmentary rupture between them, although the balanced state of the personality is their harmonization.
Origin of Matter and Time Click below to view a brief report.
GIVE SPACE TO SYMPHONY OF THE UNIVERSE Space can be described as a huge playground under the sky ring which is elastic to house infinite objects; some moving around themselves and covering the orbit paths without break in a balanced mode. Those static are governed by gravitation impact. Allow the space to the sky space to understand technology of how objects are suspended and how the balanced, safe moves are regulated without anyone letting off. It is a magic. Yes but a well-organized run. The secrets are not on any screen. Efforts are on to search other objects in the outer space with limitations to locate what is elsewhere. The time does not govern the universe but its exclusive performance controls and guides the time. Time is a shadow of the universe. It is a set auto machine though flexible and with variances; safety is the soul activating the structure of the nature. It is astonishing and the nature does not take any credit. Suspension of objects is mainly because of anti-gravitation field. Assuming some invisible space waves are managing the objects, these step in and out to keep harmony, on the pull and push principle. To simplify the sky ring is a marvellous train watching objects as passengers on the waves highway with suspended routes. Moving energy concept is in the space waves, responsible for auto rotations. This moving energy is like fuel. Why not peep into this high-tech technology application to help the earth to get some space to meet the objects kingdom? Initially the earth will operate as a passenger train, later as express and direct travel destination journey. In the beginning, the passenger train would run with moving energy fuel connected with space waves. This is a dream of advanced technology to understand the space wave binders spreading moving energy to infinite objects. If this becomes feasible, the basic threads of the universal function can be traced. In the nutshell gravitation within is the safe mode of objects. Space waves are responsible to extend energy to objects to rotate and cover the determined routes. These waves also carry lightning balanced inputs of gravitation and anti-gravitation. Only when energy conditions in space waves are affected due to pollution, bursting of objects bubbles would start on which no control can be exercised. So the environment care is a must. In fact the earth is already on the roll of the universal map of innumerable planets, stars and galaxies connected with space waves energy and internal connected routes besides ring roads for exchange of communications. All objects are linked with space waves- strings holding immense strength. Still the energy behind is not fully understood and is a riddle. These strings are prominently combination of mainly gravitation and anti-gravitation. On this foundation, pull and push is safely administered. These binders are hidden. However some window openings must be open for further monitoring. The universe is a large spectrum which is difficult to count and account for. It is an orchestra to hear and sense the sound language of the nature. 2 A clue can be associated to understand the universal sound language. When any symphony is heard, one can figure out song words. This is called deciphering sound into words. Same way the sound of the nature through different modes can be deciphered into words and who knows this can be related to some languages or combinations which can frame the universal sound language. The fool proof channel of sound language in popular songs is the immediate transfer of sound with lightning speed and ears and words quickly getting synchronized. This process makes it essay to come on the sound track and understand the universal sound language. So the driving force is the sound and sound words. H V Navangul Age 85 (2021)