LEADER 04122nam 22007815 450 001 9910254637103321 005 20200704023217.0 010 $a3-319-26419-2 024 7 $a10.1007/978-3-319-26419-6 035 $a(CKB)3710000000571719 035 $a(EBL)4313082 035 $a(SSID)ssj0001606946 035 $a(PQKBManifestationID)16317075 035 $a(PQKBTitleCode)TC0001606946 035 $a(PQKBWorkID)14895723 035 $a(PQKB)11382547 035 $a(DE-He213)978-3-319-26419-6 035 $a(MiAaPQ)EBC4313082 035 $a(PPN)191706450 035 $a(EXLCZ)993710000000571719 100 $a20160106d2016 u| 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aExcitation Spectra of Square Lattice Antiferromagnets $eTheoretical Explanation of Experimental Observations /$fby Bastien Dalla Piazza 205 $a1st ed. 2016. 210 1$aCham :$cSpringer International Publishing :$cImprint: Springer,$d2016. 215 $a1 online resource (189 p.) 225 1 $aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053 300 $aDescription based upon print version of record. 311 $a3-319-26418-4 320 $aIncludes bibliographical references. 327 $aIntroduction -- Variational Study of the Square Lattice Anti-ferromagnet Magnetic Zone-Boundary Anomaly -- Modeling the Spin-Wave Dispersion of Insulating Cuprate Materials. 330 $aThis thesis presents a qualitative advance in our understanding of quantum effects in layered magnetic materials. The nearest neighbor Heisenberg ferromagnetic ranks among the oldest and most fundamental models of quantum many body effects. It has long been established that in one dimension quantum fluctuations lead to a quantum disordered ground state with fractional excitations called spinons." In two dimensions, the ground state of the Heisenberg model displays static order and to first approximation the dynamics can be described as semi-classical spin waves. Through theoretical advances the author demonstrates that at high energy around particular points in reciprocal space these semi-classical spin-waves deconfine into fractional excitations akin to the one-dimensional spinons. He thereby provides the first explanation of a long-standing experimental observation. In the second half of his thesis Bastien Dalla Piazza develops a unified description of the magnetic excitation spectra of a range of cuprate parent compounds to the high temperature superconductors. 410 0$aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053 606 $aMagnetism 606 $aMagnetic materials 606 $aQuantum computers 606 $aSpintronics 606 $aQuantum physics 606 $aOptical materials 606 $aElectronic materials 606 $aMagnetism, Magnetic Materials$3https://scigraph.springernature.com/ontologies/product-market-codes/P25129 606 $aQuantum Information Technology, Spintronics$3https://scigraph.springernature.com/ontologies/product-market-codes/P31070 606 $aQuantum Physics$3https://scigraph.springernature.com/ontologies/product-market-codes/P19080 606 $aOptical and Electronic Materials$3https://scigraph.springernature.com/ontologies/product-market-codes/Z12000 615 0$aMagnetism. 615 0$aMagnetic materials. 615 0$aQuantum computers. 615 0$aSpintronics. 615 0$aQuantum physics. 615 0$aOptical materials. 615 0$aElectronic materials. 615 14$aMagnetism, Magnetic Materials. 615 24$aQuantum Information Technology, Spintronics. 615 24$aQuantum Physics. 615 24$aOptical and Electronic Materials. 676 $a538.44 700 $aDalla Piazza$b Bastien$4aut$4http://id.loc.gov/vocabulary/relators/aut$0805088 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910254637103321 996 $aExcitation Spectra of Square Lattice Antiferromagnets$92541011 997 $aUNINA