Abstract
Spin-valley locking in monolayer transition metal dichalcogenides has attracted enormous interest, since it offers potential for valleytronic and optoelectronic applications. Such an exotic ...electronic state has sparsely been seen in bulk materials. Here, we report spin-valley locking in a Dirac semimetal BaMnSb
2
. This is revealed by comprehensive studies using first principles calculations, tight-binding and effective model analyses, angle-resolved photoemission spectroscopy measurements. Moreover, this material also exhibits a stacked quantum Hall effect (QHE). The spin-valley degeneracy extracted from the QHE is close to 2. This result, together with the Landau level spin splitting, further confirms the spin-valley locking picture. In the extreme quantum limit, we also observed a plateau in the
z
-axis resistance, suggestive of a two-dimensional chiral surface state present in the quantum Hall state. These findings establish BaMnSb
2
as a rare platform for exploring coupled spin and valley physics in bulk single crystals and accessing 3D interacting topological states.
"Damage Incorporated" is the first book about the legendary heavy metal band Metallica that provides a detailed exploration of the group’s music and its place within the wider popular music ...landscape. Written with a broad readership in mind, it offers an interdisciplinary study that incorporates a range of topics which intersect with the band’s music and cultural influence. For students of popular culture, mass media, and music, "Damage Incorporated" will be necessary reading, and sets a new standard for the study and exploration of metal within the field of popular music studies.
Glenn T. Pillsbury is a recent Ph.D. in Musicology from UCLA and a rising star in the field of popular music studies. He is the author of the "Metallica" chapter in the Encyclopedia Britannica, a founding member of the editorial board of the online music journal ECHO, and a regular presenter of papers at major scholarly meetings in music and the arts.
Spin-valley locking in monolayer transition metal dichalcogenides has attracted enormous interest, since it offers potential for valleytronic and optoelectronic applications. Such an exotic ...electronic state has sparsely been seen in bulk materials. Here, we report spin-valley locking in a Dirac semimetal BaMnSb
. This is revealed by comprehensive studies using first principles calculations, tight-binding and effective model analyses, angle-resolved photoemission spectroscopy measurements. Moreover, this material also exhibits a stacked quantum Hall effect (QHE). The spin-valley degeneracy extracted from the QHE is close to 2. This result, together with the Landau level spin splitting, further confirms the spin-valley locking picture. In the extreme quantum limit, we also observed a plateau in the z-axis resistance, suggestive of a two-dimensional chiral surface state present in the quantum Hall state. These findings establish BaMnSb
as a rare platform for exploring coupled spin and valley physics in bulk single crystals and accessing 3D interacting topological states.
From cave paintings to children's books, imaginative drawings accompanied by compelling narratives are a part of human history. Even the most fidgety children will sit still for a good story. ...Learner-generated illustrations serve as an instructional strategy promoting conceptual change and a viable way for students to learn scientific concepts. In this article, the author describes a way to teach students how to change words into pictures with a method he calls "diagramming" where students generate their own depictions and create their own stories to increase their true understanding of science concepts.
Bon Jovi Glenn T. Pillsbury
New Grove Dictionary of Music and Musicians,
02/2013
Reference
Hard-rock band founded in early 1983 and led by John Bon Jovi (Bongiovi; b 2 March 1962; vocals and songwriting). It achieved prominence as part of the so-called hair metal or lite metal wing of the ...general heavy-metal movement during 1980s. The group’s first two albums gradually built up its success, but Bon Jovi broke into the mainstream following the release of Slippery when Wet (Mercury, 1986), which featured finely honed production and contributions by the famous “hired-gun” songwriter Desmond Child. The group’s energetic rock style engages with topics of romance and hedonism but nevertheless retains important connections to a set of working-class experiences in a manner popularized by Bruce Springsteen. Music videos for “You give love a bad name” and “Livin’ on a Prayer,” both of which became top ten singles, showcased a photogenic and non-threatening version of heavy metal quite at odds with that put forth by such groups as Metallica and Iron Maiden. “Wanted Dead or Alive” couched the travails of life on the road in the sentimental aesthetics of an acoustic power ballad. The group quickly followed with ...
Laser scanning phase modulation microscope Hansen, E. W.; Allen, R. D.; Strohbehn, J. W. ...
Journal of microscopy (Oxford),
December 1985, Letnik:
140, Številka:
3
Journal Article
Recenzirano
SUMMARY
We describe the concept and first implementation of an innovative new instrument for quantitative light microscopy. Currently, it provides selective imaging of optical path differences due to ...birefringence; with further development, it is also possible to selectively image several optical properties, including refractive path differences, optical rotation, and linear and circular dichroism, all with diffraction‐limited resolution. An image consists of a 512×512 element array, with each pixel displaying one of 256 grey levels, linearly proportional to the specific optical property being observed. Additionally, conventional brightfield and polarized light microscopy are available, with the accompanying advantages of laser scanning and digital image processing.
The microscope consists of three subsystems, representing three distinct technologies. The laser scanning subsystem moves a focused, microspot across the specimen; the output of a photodetector is an electric signal corresponding to a scanned image. The image display subsystem digitizes this signal and displays it as an image on a video monitor. When used in conjunction with a phase modulation feedback loop, the image formed is of the specimen's birefringent retardation or other selected optical property. The digitized images are also available for computer enhancement.
NATURE COMMUNICATIONS 12:4062 (2021) Spin-valley locking in the band structure of monolayers of MoS$_2$ and other
group-VI dichalcogenides has attracted enormous interest, since it offers
potential ...for valleytronic and optoelectronic applications. Such an exotic
electronic state has sparsely been seen in bulk materials. Here, we report
spin-valley locking in a bulk Dirac semimetal BaMnSb$_2$. We find valley and
spin are inherently coupled for both valence and conduction bands in this
material. This is revealed by comprehensive studies using first principle
calculations, tight-binding and effective model analyses, angle-resolved
photoemission spectroscopy and quantum transport measurements. Moreover, this
material also exhibits a stacked quantum Hall effect. The spin-valley
degeneracy extracted from the plateau height of quantized Hall resistivity is
close to 2. This result, together with the observed Landau level spin
splitting, further confirms the spin-valley locking picture. In the extreme
quantum limit, we have also observed a two-dimensional chiral metal at the side
surface, which represents a novel topological quantum liquid. These findings
establish BaMnSb$_2$ as a rare platform for exploring coupled spin and valley
physics in bulk single crystals and accessing 3D interacting topological
states.
In this article, we present the historical and current developments of inclusive education (IE) in the U.S. in the context of recent changes toward a more inclusive approach to education (IE) in the ...Czech Republic. We highlight the lessons learned with respect to the implementation of IE practices in U.S. schools as a means to uphold the right to education for all. Research findings of the impact of IE on the academic and social outcomes of children and youth with disabilities, from other diverse backgrounds and for students without disabilities are summarized. The goal of this article is to inspire educators and scholars in the Czech Republic and other countries in Central and Eastern Europe to utilize the presented information on IE research and implementation practices in their local educational contexts, taking into account both the local context and current needs.
Spin-valley locking in the band structure of monolayers of MoS\(_2\) and other group-VI dichalcogenides has attracted enormous interest, since it offers potential for valleytronic and optoelectronic ...applications. Such an exotic electronic state has sparsely been seen in bulk materials. Here, we report spin-valley locking in a bulk Dirac semimetal BaMnSb\(_2\). We find valley and spin are inherently coupled for both valence and conduction bands in this material. This is revealed by comprehensive studies using first principle calculations, tight-binding and effective model analyses, angle-resolved photoemission spectroscopy and quantum transport measurements. Moreover, this material also exhibits a stacked quantum Hall effect. The spin-valley degeneracy extracted from the plateau height of quantized Hall resistivity is close to 2. This result, together with the observed Landau level spin splitting, further confirms the spin-valley locking picture. In the extreme quantum limit, we have also observed a two-dimensional chiral metal at the side surface, which represents a novel topological quantum liquid. These findings establish BaMnSb\(_2\) as a rare platform for exploring coupled spin and valley physics in bulk single crystals and accessing 3D interacting topological states.
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