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Supersolids reliant on disorder, say physicists
Supersolids crystal
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2007/5/9
Physicists in the US have shown that a supposed quantum phase of matter known as a "supersolid" is strongly dependent on the amount of crystal disorder present in the sample being studied. By performi...
Disorder May Be in Order for ‘Spintronic’ Devices（图）
spinning electrons magnetism
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2007/2/28
February 15, 2007，Physicists at JILA are using ultrashort pulses of laser light to reveal precisely why some electrons, like ballet dancers, hold their spin positions better than others—work that may ...
Effects of Disorder on the Exchange Coupling in (Ga,Mn)As Diluted Magnetic Semiconductors
Disorder Exchange coupling Diluted magnetic semiconductors
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2010/8/26
A theoretical study of the effects of disorder on the Mn-Mn exchange interactions for Ga1¡xMnxAs diluted magnetic semiconductors is presented. The disorder is intrinsically considered in the cal...
On Electron Mobility in a Rectangular Quantum Wire due to Alloy Disorder
Electron Mobility Alloy Disorder Rectangular Quantum Wire
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2010/4/12
Analytic expressions are derived to describe the electron mobility and relaxation rate in the rectangular quantum wire experiencing scattering due to alloy disorder. The dependence of electron mobilit...
Free-Carrier Absorption in Quantum Well Structures for Alloy-Disorder Scattering
Alloy-Disorder Scattering Quantum Well Structures Free-Carrier Absorption
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2010/4/13
A free-carrier absorption theory is given for quantum wells structures in III-V semiconducting materials, for the case when the carriers a scattered by alloy-disorder. It is found that absorption coef...
Tobermorites: Their real structure and order-disorder (OD) character
Tobermorites real structure order-disorder character
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2012/4/1
The real structures of clinotobermorite, tobermorite 9 ?, and tobermorite 11 ? were determined
through the application of OD approach, which allowed us to explain their peculiar disorder and
polytyp...
Calorimetric studies of the energetics of order-disorder in the system Mg1-xFexCa(CO3)2
Calorimetric studies energetics order-disorder system Mg1-xFexCa(CO3)2
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2012/4/1
Calorimetric studies by Chai and Navrotsky (1996) on dolomite-ankerite energetics have beenextended by including two additional types of samples: a very disordered stoichiometric MgCa(CO3 2prepared fr...
Effects of disorder on the drag rate in double quantum-wire systems
drag rate double quantum-wire systems
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2010/4/15
We study the Coulomb drag rate for electrons in a double quantum-wire structure in the presence of disorder. We use the particle number-conserving relaxation-time approximation to phenomenologically b...
Order-disorder process in the tetrahedral sites of albite
Order-disorder proces tetrahedral sites of albite
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2012/3/31
The crystal structure of albite from Stintino, Sardinia, Italy, was refined at different degrees of
disorder to determine the (Si-Al) order-disorder process. Eight X-ray structure refinements were
p...
Gillulyite Tl2(As,Sb)8S13: Reinterpretation of the crystal structure and order-disorder phenomena
Tl2(As,Sb)8S13:crystal structure order-disorder phenomena slabs
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2012/3/31
ThecrystalstructureofgillulyiteTl (As,Sb) S wasreinterpretedbasedontheaverage
structuredeterminedbyFoitetal.(1995).ItconsistsofalternatingPbS-likeslabscom-
prisedofAs-SpolyhedraandTl-bearingslabswit...
Near-infrared study of short-range disorder of OH and F in monoclinic amphiboles
Amphiboles OH-stretchingregion
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2012/3/30
Amphibolesweresynthesizedalongthejoinstremolite¤C?uorotremolite,richterite¤C?u
rorichteriteandpotassic-richterite¤Cpotassic-?uororichteriteat75Cand1kbar P(H O).
2
Infraredspectraoftheamphiboleswere...
HRTEM and SAED investigations of polytypism, stacking disorder, crystal growth, and vacancies in chlorites from subgreenschist facies outcrops
Selected-area electron diffraction high-resolutio transmission electron microscopy
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2012/3/30
Selected-areaelectrondiffraction(SAED)combinedwithexperimentalandcomputed
high-resolutiontransmissionelectronmicroscopy(HRTEM)imageswereusedtoinvesti-
gatepolytypism,stackingdisorder,mixedlayering,a...
Ordering Due to Disorder in Frustrated Quantum Magnetic Systems
Quantum Magnetic frustrated magnetic systems
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2010/4/16
The phenomenon of order by disorder in frustrated magnetic systems is reviewed. Disorder (thermal or quantum fluctuations) may sometimes give rise to long range ordering in systems with frustration, w...
Fe-Mg order-disorder in tremolite-actinolite-ferro-actinolite at ambient and high temperature
Fe-Mg order-disorder tremolite-actinolite-ferro-actinolite temperature
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2012/3/31
The crystal structures and M-site populations of a series of unheated and heat-treated,near-binary members of the actinolite series were determined from single-crystal X-ray diffraction data. Small, s...
Stacking disorder and polytypism in enargite and luzonite
Stacking disorder polytypism enargite luzonite
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2012/3/31
Microstructures of enargite and luzonite (Cu3AsS4) were studied using high-resolution transmission electron microscopy (HRTEM) and selected-area electron diffraction (SAED). Enargite and luzonite are ...