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10.1038/ncomms7708 http://scihub22266oqcxt.onion/10.1038/ncomms7708 C4389227!4389227!25819547     free     free     free Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       Nat+Commun ä ; 6 (ä): ä Nephropedia Template TP {{tp|p=25819547|t=ä. Ultrafast and reversible control of the exchange interaction in Mott insulators |pdf=|usr=}}{{25819547}} gab.com Text Ultrafast and reversible control of the exchange interaction in Mott insulators JO: Nat Commun http://www.kidney.de/pget.php?&tw=1&pmid=25819547 #FOAvip The strongest interaction between microscopic spins in magnetic materials is the exchange interaction Jex. Therefore, ultrafast control of Jex holds the promise to control spins on ultimately fast timescales. We demonstrate that time-periodic modulation of the electronic structure by electric fields can be used to reversibly control Jex on ultrafast timescales in extended antiferromagnetic Mott insulators. In the regime of weak driving strength, we find that Jex can be enhanced and reduced for frequencies below and above the Mott gap, respectively. Moreover, for strong driving strength, even the sign of Jex can be reversed and we show that this causes time reversal of the associated quantum spin dynamics. These results suggest wide applications, not only to control magnetism in condensed matter systems, for example, via the excitation of spin resonances, but also to assess fundamental questions concerning the reversibility of the quantum many-body dynamics in cold atom systems. Twit Text FOAVip Ultrafast and reversible control of the exchange interaction in Mott insulators ????Nat Commun http://www.kidney.de/pget.php?&tw=1&pmid=25819547 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=25819547 #FOAvip English Wikipedia <ref>{{Cite pmid|25819547}}</ref> Ultrafast and reversible control of the exchange interaction in Mott insulators #MMPMID25819547 Mentink JH; Balzer K; Eckstein M Nat Commun ä[]; 6 (ä): ä PMID25819547show ga The strongest interaction between microscopic spins in magnetic materials is the exchange interaction Jex. Therefore, ultrafast control of Jex holds the promise to control spins on ultimately fast timescales. We demonstrate that time-periodic modulation of the electronic structure by electric fields can be used to reversibly control Jex on ultrafast timescales in extended antiferromagnetic Mott insulators. In the regime of weak driving strength, we find that Jex can be enhanced and reduced for frequencies below and above the Mott gap, respectively. Moreover, for strong driving strength, even the sign of Jex can be reversed and we show that this causes time reversal of the associated quantum spin dynamics. These results suggest wide applications, not only to control magnetism in condensed matter systems, for example, via the excitation of spin resonances, but also to assess fundamental questions concerning the reversibility of the quantum many-body dynamics in cold atom systems. äUltrafast and reversible control of the exchange interaction in Mott i(epmc).pdf DeepDyve Pubget Overpricing