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Recent progresses in surface plasmon propagation at the nanometer scale |
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2010.03.08
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Photon, as the information carrier, has great advantages, for instance, large band width, high density, high speed, low damping. Half of the Nobel Prize for Physics in 2009 is given to Professor Charles Kao for his groundbreaking achievements concerning the transmission of light in fibers for optical communication. However, diffraction limit is an obstacle for the miniaturization of optical devices and chips. In recent years, surface plasmons (SPs), collective oscillations of free electron gas at the interface of metal and dielectric, attract the researchers’ attention since SPs can break the diffraction limit of light. The manipulation o...
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Non-superconducting parent compound material turns superconducting when a thin film |
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2010.03.05
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As an important area of condensed matter physics, thin film studies have helped push forward the semiconductor and optics industries and stimulated the emergence and growth of several research areas in which dimensions and sizes dominate, such as quantum confinement and surface and interface effects. For superconductivity in particular, thin films have served as important media for the exploration and synthesis of new materials because of their metastability. For example, Nb3Ge films of the A15 structure held the record of the highest superconducting transition temperature for a long period of time before the discovery of cuprate HTS sup...
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Direct Observation of Fermi Pockets and their Coexistence with Fermi Arcs in High-Tc Copper-Oxide Superconductors |
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2009.12.15
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The discovery of high temperature copper-oxide (cuprate) superconductors in 1986 has posed many fundamental challenges in condensed matter physics. The parent compound of cuprate superconductors is an antiferromagnetic insulator; it becomes metallic and superconducting by doping charge carriers (electrons or holes). It is found that in the so-called underdoped region where only a small amount of carriers are introduced, cuprate superconductors exhibit a number of anomalous normal state properties (above superconducting transition temperature, Tc), which deviate significantly from the conventional theory of metals -- the Landau Fermi liqui...
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Physical Account of Abnormal Activity of Disulfide Bond Isomerase (DsbC dimer) |
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2009.12.08
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Protein structure in vivo is generally different from that of “frozen” crystal structure. In some cases, such a discrepancy can be so large that it leads to the biological activity of the protein being totally different from that associated to the crystal structure. Therefore, it is imperative to develop physical methods to solve, at least partially the dynamical protein structure under physiological condition.
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Advanced Materials Special issue for IOPCAS |
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2009.12.07
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In recent years, Institute of Physics Chinese Academy of Sciences has made a series of achievements in the field of condensed matter physics, material physics and other related research fields, which attracted broad attention from international peers. Under invitation by Dr. Peter Gregory, Chief Editor of Advanced Materials, December 4th 2009 Advanced Materials published a Special Issue for Institute of Physics, Chinese Academy of Sciences. Altogether 14 researchers from IOP wrote papers for the Special Issue, which showed their latest research results in related fields.
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Recent progresses in the superconducting mechanism of iron-based high-temperature superconductors |
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2009.12.03
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Recent progresses in the superconducting mechanism of iron-based high-temperature superconductors High-temperature superconductivity has been a key area of condensed matter physics for many years. As a new type of high-temperature superconductor, the iron-based superconductors have significantly broaden people’s vision due to their novel properties and its potentially unconventional superconducting mechanism which remains an important unsolved problem in condensed matter physics.
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Experimental observation of nonlinear coherent destruction of tunneling |
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2009.12.02
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Due to quantum tunneling, a particle in a double-well potential is not allowed to stay forever in one of the wells. However, it was discovered that when the double-well system is placed under a periodic driving, the particle can be localized in one well when the system parameters are carefully chosen. This phenomenon was called coherent destruction of tunneling (CDT) by Grossmann et al in 1991 (Phys. Rev. Lett. 67, 516 (1991)). It is sometimes also called dynamical localization. CDT has so far generated great interests and has recently been observed experimentally in two very different physical systems.（Phys. Rev. Lett. 98, 263601（2007）...
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