ISSN:0031-9228    

DOI:10.1063/1.2409989

出版商:AIP    

年代:1903

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.1611331

出版商:AIP    

年代:1903

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.1611335

出版商:AIP    

年代:1903

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.1611337

出版商:AIP    

年代:1903

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2409990

出版商:AIP    

年代:1903

数据来源: AIP

摘要:

Since the discovery 17 years ago of high‐temperature superconductivity in such copper oxides as lanthanum strontium copper oxide, researchers have been taking a close look at related materials. If the copper oxides could surprise us in this way, they asked, what phenomena might lurk in other unexplored materials? Sodium cobalt oxide(NaxCoO2)has some answers.

ISSN:0031-9228    

DOI:10.1063/1.1611341

出版商:AIP    

年代:1903

数据来源: AIP

摘要:

When the Schro¨dinger equation is solved for periodic potentials, the allowed energies are confined to a series of energy bands. That predicted energy structure is familiar from metals, semiconductors, and insulators. A similar but less well‐known prediction follows when Maxwell's equations are applied to materials in which the dielectric function varies periodically: The frequencies of light that can propagate through the medium are confined to prescribed bands. Light with frequencies in the gaps between those photonic bands reflects off the medium's surface.

ISSN:0031-9228    

DOI:10.1063/1.1611342

出版商:AIP    

年代:1903

数据来源: AIP

摘要:

In papers that dissect the physics of chemical reactions, you'll often find a cartoon. The molecules in the cartoon appear as colored blobs or stick figures. Simple arrows indicate key motions. More succinctly than words or Hamiltonians, the cartoon embodies and conveys what's going on.

ISSN:0031-9228    

DOI:10.1063/1.1611343

出版商:AIP    

年代:1903

数据来源: AIP

摘要:

Public and private sectors of US ground‐based astronomy have teamed up to design a 30‐meter optical‐infrared telescope. The alliance was formed to bolster the chances of realizing the project, but it could also herald a thawing of relations between the traditional rivals.

ISSN:0031-9228    

DOI:10.1063/1.1611344

出版商:AIP    

年代:1903

数据来源: AIP

摘要:

Deep in South Dakota's Homestake mine, in shafts and chambers that had been dry for decades, there is the sound of moving water. Flowing in at a rate of nearly 500 gallons per minute, the water has been filling Homestake since 10 June, when Barrick Gold Corp of Canada, the company that owns the mine, kept its promise to shut off the pumps that protected against flooding.

ISSN:0031-9228    

DOI:10.1063/1.1611345

出版商:AIP    

年代:1903

数据来源: AIP