Zobrazeno 1 - 10
of 374
pro vyhledávání: '"Ashcroft N"'
Autor:
Grockowiak, A. D., Ahart, M., Helm, T., Coniglio, W. A., Kumar, R., Somayazulu, M., Meng, Y., Oliff, M., Williams, V., Ashcroft, N. W., Hemley, R. J., Tozer, S. W.
The search for room temperature superconductivity has accelerated dramatically in the last few years driven largely by theoretical predictions that first indicated alloying dense hydrogen with other elements could produce conventional phonon-mediated
Externí odkaz:
http://arxiv.org/abs/2006.03004
Publikováno v:
Phys. Rev. Materials 3, 044203 (2019)
Topological semimetals generally contain heavy elements. Using density-functional theoretic calculations, we predict that three dense lithium polymorphs in the pressure range 200--360 GPa display nontrivial semimetallic electronic structure. Specific
Externí odkaz:
http://arxiv.org/abs/1901.04130
Autor:
Mallett, B. P. P., Wolf, T., Gilioli, E., Licci, F., Williams, G. V. M., Kaiser, A. B., Suresh, N., Ashcroft, N. W., Tallon, J. L.
We suggest, and demonstrate, a systematic approach to the study of cuprate superconductors, namely, progressive change of ion size in order to systematically alter the interaction strength and other key parameters. R(Ba,Sr)$_2$Cu$_3$O$_y$ (R={La, ...
Externí odkaz:
http://arxiv.org/abs/1211.1206
Autor:
Rousseau, Bruno, Ashcroft, N. W.
We investigate the ground-state properties of a collection of \textit{N} non-interacting electrons in a macroscopic volume $\Omega$ also containing a crystalline array of \textit{N} spheres of radius $r_c$ each taken as largely impenetrable to electr
Externí odkaz:
http://arxiv.org/abs/0804.1590
Autor:
Bonev, S. A., Ashcroft, N. W.
We introduce a diagrammatic quantum field formalism for the evaluation of normalized expectation values of operators, and suitable for systems with localized electrons. It is used to develop a convergent series expansion for the energy in powers of o
Externí odkaz:
http://arxiv.org/abs/0710.5000
Autor:
Babaev, Egor, Ashcroft, N. W.
Publikováno v:
Nature Physics 3, 530 - 533 (2007)
Non-classical response to rotation is a hallmark of quantum ordered states such as superconductors and superfluids. The rotational responses of all currently known single-component "super" states of matter (superconductors, superfluids and supersolid
Externí odkaz:
http://arxiv.org/abs/0706.2411
Autor:
Gravel, Simon, Ashcroft, N. W.
Publikováno v:
Phys. Rev. B 76, 144103 (2007)
We present a general method based on nonlinear response theory to obtain effective interactions between ions in an electron gas which can also be applied to other systems where an adiabatic separation of time-scales is possible. Nonlinear contributio
Externí odkaz:
http://arxiv.org/abs/cond-mat/0703136
Publikováno v:
Phys. Rev. Lett. 95, 105301 (2005)
Dissipationless quantum states, such as superconductivity and superfluidity, have attracted interest for almost a century. A variety of systems exhibit these macroscopic quantum phenomena, ranging from superconducting electrons in metals to superflui
Externí odkaz:
http://arxiv.org/abs/cond-mat/0507605
Publikováno v:
Nature 431 (2004) 666-668
Although hydrogen is the simplest of atoms, it does not form the simplest of solids or liquids. Quantum effects in these phases are considerable (a consequence of the light proton mass) and they have a demonstrable and often puzzling influence on man
Externí odkaz:
http://arxiv.org/abs/cond-mat/0410408
Autor:
Atwal, G. S., Ashcroft, N. W.
Spin correlations in an interacting electron liquid are studied in the high-frequency limit and in both two and three dimensions. The third-moment sum rule is evaluated and used to derive exact limiting forms (at both long- and short-wavelengths) for
Externí odkaz:
http://arxiv.org/abs/cond-mat/0305195