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	<title>Superconductivity's Weblog</title>
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	<link>http://superconductivity.wordpress.com</link>
	<description>Recent important progresses in the filed of HTSCs</description>
	<pubDate>Thu, 17 Jan 2008 11:19:58 +0000</pubDate>
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	<language>en</language>
			<item>
		<title>Relation of Quantum Magnetic Excitations with Stripes?!</title>
		<link>http://superconductivity.wordpress.com/2008/01/17/relation-of-quantum-magnetic-excitations-with-stripes/</link>
		<comments>http://superconductivity.wordpress.com/2008/01/17/relation-of-quantum-magnetic-excitations-with-stripes/#comments</comments>
		<pubDate>Thu, 17 Jan 2008 11:19:58 +0000</pubDate>
		<dc:creator>superconductivity</dc:creator>
		
		<category><![CDATA[INS]]></category>

		<category><![CDATA[The. &amp; pheno.]]></category>

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		<description><![CDATA[Stripe formation is a good way to interpret the coexistence of antiferromagnetism order and superconductivity in HTSCs. However, the spectrum of magnetic excitation of YBCO is not consistent with the theoretical prediction for a material including stripes. A group of scientists from the USA, UK, and Japan have investigated this contraction by measuring inelastic neutron [...]]]></description>
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			<media:title type="html">nature2004-mag-lsco-tranquada.jpg</media:title>
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		<item>
		<title>Coupling of Charge Carriers to the Spin Fluctuation</title>
		<link>http://superconductivity.wordpress.com/2008/01/08/coupling-of-charge-carriers-to-the-spin-fluctuation/</link>
		<comments>http://superconductivity.wordpress.com/2008/01/08/coupling-of-charge-carriers-to-the-spin-fluctuation/#comments</comments>
		<pubDate>Tue, 08 Jan 2008 14:23:12 +0000</pubDate>
		<dc:creator>superconductivity</dc:creator>
		
		<category><![CDATA[INS]]></category>

		<category><![CDATA[IR]]></category>

		<guid isPermaLink="false">http://superconductivity.wordpress.com/2008/01/08/coupling-of-charge-carriers-to-the-spin-fluctuation/</guid>
		<description><![CDATA[In an electron-phonon system the electron-phonon interaction spectral density, α2F(ω), is approximately equal to W(ω) defined as:
                           α2F(ω)≈W(ω)=(1/2π)d2[ωRe(σ-1(ω))]/dω2   (1)
Where, Re(σ(ω)) is the real part of the optical conductivity. For the electron-spin interaction systems this relation could be converted to I2χ(ω)≈W(ω), where I is the coupling constant of electron-spin interaction and χ(ω) is the imaginary part [...]]]></description>
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		<media:content url="http://superconductivity.files.wordpress.com/2008/01/nature1999-401-354-magnon-carbotte.jpg" medium="image">
			<media:title type="html">nature1999-401-354-magnon-carbotte.jpg</media:title>
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		<item>
		<title>Unusual or Usual Isotope Effect in HTSCs?!?</title>
		<link>http://superconductivity.wordpress.com/2007/12/26/unusual-or-usual-isotope-effect-in-htscs/</link>
		<comments>http://superconductivity.wordpress.com/2007/12/26/unusual-or-usual-isotope-effect-in-htscs/#comments</comments>
		<pubDate>Wed, 26 Dec 2007 11:46:19 +0000</pubDate>
		<dc:creator>superconductivity</dc:creator>
		
		<category><![CDATA[ARPES]]></category>

		<guid isPermaLink="false">http://superconductivity.wordpress.com/2007/12/26/unusual-or-usual-isotope-effect-in-htscs/</guid>
		<description><![CDATA[The isotope effect (IE) on Tc of optimally doped HTSCs (α=dlnTc/dlnM &#60;0.1) is small in comparison with the conventional BCS superconductors (α~0.5), an evidence that usually used against the phonon mediated pairing in HTSCs. However, the ARPES kink is one of the strongest evidence that there is strong electron-phonon coupling in HTSCs. To confirm this, [...]]]></description>
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		<item>
		<title>Magnetic Resonance Mode and Its Relation with Thermodynamics of HTSCs</title>
		<link>http://superconductivity.wordpress.com/2007/12/17/resonance-magnetic-mode-and-its-relation-with-thermodynamics-of-htscs/</link>
		<comments>http://superconductivity.wordpress.com/2007/12/17/resonance-magnetic-mode-and-its-relation-with-thermodynamics-of-htscs/#comments</comments>
		<pubDate>Sun, 16 Dec 2007 15:54:13 +0000</pubDate>
		<dc:creator>superconductivity</dc:creator>
		
		<category><![CDATA[INS]]></category>

		<guid isPermaLink="false">http://superconductivity.wordpress.com/2007/12/17/resonance-magnetic-mode-and-its-relation-with-thermodynamics-of-htscs/</guid>
		<description><![CDATA[The most prominent feature of spin fluctuation in YBCO6+x system is the 41 meV resonance peak which appears below the Tc of the optimal sample. This feature (and strong spin fluctuation for all x values in this system) has been considered as an important experimental evidence for the magnetic interaction pairing of HTSCs although its [...]]]></description>
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			<media:title type="html">superconductivity</media:title>
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		<media:content url="http://superconductivity.files.wordpress.com/2007/12/science1999-284-1344-resonance-peak-dai-1.jpg" medium="image">
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		<title>Special Relationship between Real and Momentum Spaces</title>
		<link>http://superconductivity.wordpress.com/2007/12/05/special-relationship-between-real-and-momentum-spaces/</link>
		<comments>http://superconductivity.wordpress.com/2007/12/05/special-relationship-between-real-and-momentum-spaces/#comments</comments>
		<pubDate>Wed, 05 Dec 2007 12:03:17 +0000</pubDate>
		<dc:creator>superconductivity</dc:creator>
		
		<category><![CDATA[STM]]></category>

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		<description><![CDATA[Scientists from the USA, China and Japan have studied the Furrier transform scanning tunneling spectroscopy (FT-STS) of Bi-2212 crystals to find the relation between the features of r-space and k-space electronic structures of HTSCs: such as the modulation of the electronic local density of states (LDOS~g(r,ω)) observed by STM, and coherence peak, Fermi surface and [...]]]></description>
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			<media:title type="html">superconductivity</media:title>
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		<media:content url="http://superconductivity.files.wordpress.com/2007/12/nature2003-422-592-interefrence-stm-mcelory.jpg" medium="image">
			<media:title type="html">nature2003-422-592-interefrence-stm-mcelory.jpg</media:title>
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		<item>
		<title>Is Continuum Background More Important Than Resonance Mode?</title>
		<link>http://superconductivity.wordpress.com/2007/11/25/is-continuum-background-more-important-than-resonance-mode/</link>
		<comments>http://superconductivity.wordpress.com/2007/11/25/is-continuum-background-more-important-than-resonance-mode/#comments</comments>
		<pubDate>Sun, 25 Nov 2007 14:06:04 +0000</pubDate>
		<dc:creator>superconductivity</dc:creator>
		
		<category><![CDATA[IR]]></category>

		<guid isPermaLink="false">http://superconductivity.wordpress.com/2007/11/25/is-continuum-background-more-important-than-resonance-mode/</guid>
		<description><![CDATA[The observed sharp &#8216;kink&#8217; in the ARPES has been related to the phonon or magnetic mode as a possible signature of the force that create the superconducting state in HTSCs. A group of scientists from Canada and the USA have studied this situation by Fourier-transform infrared (FTIR) spectroscopy of optimally doped (Tc=96 K) and highly [...]]]></description>
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			<media:title type="html">superconductivity</media:title>
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		<media:content url="http://superconductivity.files.wordpress.com/2007/11/nature2004-427-414-optical-res-mode-hwang.jpg" medium="image">
			<media:title type="html">nature2004-427-414-optical-res-mode-hwang.jpg</media:title>
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		<item>
		<title>High Energy Magnetic Excitations in YBCO</title>
		<link>http://superconductivity.wordpress.com/2007/11/20/high-energy-magnetic-excitations-in-ybco/</link>
		<comments>http://superconductivity.wordpress.com/2007/11/20/high-energy-magnetic-excitations-in-ybco/#comments</comments>
		<pubDate>Tue, 20 Nov 2007 09:58:16 +0000</pubDate>
		<dc:creator>superconductivity</dc:creator>
		
		<category><![CDATA[INS]]></category>

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		<description><![CDATA[Dramatic changes in the magnetic excitation spectrum by going to the superconducting state of HTSCs, known as the “resonance” peak, have been considered as a strong evidence for the magnetic pairing mechanism of superconductivity in these systems. The resonance peak occurs at Eres=41 and 34 meV [at q=(0.5, 0.5) in the CuO2 reciprocal lattice units [...]]]></description>
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			<media:title type="html">superconductivity</media:title>
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		<media:content url="http://superconductivity.files.wordpress.com/2007/11/nature2004-429-531-magnetic-excitation-hayden.jpg" medium="image">
			<media:title type="html">nature2004-429-531-magnetic-excitation-hayden.jpg</media:title>
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		<item>
		<title>Electron-Boson Interaction: Phonons or Magnetic Modes?</title>
		<link>http://superconductivity.wordpress.com/2007/11/14/electron-boson-interaction-phonons-or-magnetic-modes/</link>
		<comments>http://superconductivity.wordpress.com/2007/11/14/electron-boson-interaction-phonons-or-magnetic-modes/#comments</comments>
		<pubDate>Wed, 14 Nov 2007 10:34:26 +0000</pubDate>
		<dc:creator>superconductivity</dc:creator>
		
		<category><![CDATA[STM]]></category>

		<guid isPermaLink="false">http://superconductivity.wordpress.com/2007/11/14/electron-boson-interaction-phonons-or-magnetic-modes/</guid>
		<description><![CDATA[
Determining of bosons (phonon or magnetic modes) which play an important role in the electron-boson interaction (EBI) and making pairs in HTSCs has been complicated, because different aspects of experimental evidences such as ARPES and optical spectroscopy could be interpreted by one of these bosons. Recently atomic-resolution STM study of Bi-2212 has been done by [...]]]></description>
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		<item>
		<title>Strong Electron-Phonon Interaction in HTSCs</title>
		<link>http://superconductivity.wordpress.com/2007/11/07/strong-electron-phonon-interaction-in-htscs/</link>
		<comments>http://superconductivity.wordpress.com/2007/11/07/strong-electron-phonon-interaction-in-htscs/#comments</comments>
		<pubDate>Wed, 07 Nov 2007 08:31:02 +0000</pubDate>
		<dc:creator>superconductivity</dc:creator>
		
		<category><![CDATA[ARPES]]></category>

		<guid isPermaLink="false">http://superconductivity.wordpress.com/2007/11/07/strong-electron-phonon-interaction-in-htscs/</guid>
		<description><![CDATA[
One of the most important issues related to the mechanism of superconductivity in HTSCs is the role of electron-phonon (el-ph) interaction in this mechanism for such a strongly correlated electron systems. A group of scientists from the US and Japan have revealed a strong experimental evidence for existence of the strong electron-phonon interaction in these [...]]]></description>
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		<title>Are HTSCs Quantum Protectorate!?</title>
		<link>http://superconductivity.wordpress.com/2007/11/05/are-htscs-quantum-protectorate/</link>
		<comments>http://superconductivity.wordpress.com/2007/11/05/are-htscs-quantum-protectorate/#comments</comments>
		<pubDate>Mon, 05 Nov 2007 07:58:15 +0000</pubDate>
		<dc:creator>superconductivity</dc:creator>
		
		<category><![CDATA[The. &amp; pheno.]]></category>

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		<description><![CDATA[“Quantum protector” (QP) is a macroscopic quantum (for example quantum Hall effect and flux quantization of superconductivity) that is usually unaffected by imperfection, impurities and thermal fluctuations. In this state the excitations are collective excitations of the whole system rather than usual elementary excitations in many-body systems such as in Fermi liquid. P.W. Anderson believes that [...]]]></description>
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