Tag: Spin

December 13, 2024

FRUSTRATED SPIN SYSTEMS

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Free Download Hung-The Diep, "FRUSTRATED SPIN SYSTEMS"
English | ISBN: 9812560912 | 2005 | 624 pages | PDF | 32 MB
Frustrated spin systems have been first investigated five decades ago. Well-known examples include the Ising model on the antiferromagnetic triangular lattice studied by G H Wannier in 1950 and the Heisenberg helical structure discovered independently by A Yoshimori, J Villain and T A Kaplan in 1959. However, many properties of frustrated systems are still not well understood at present. Recent studies reveal that established theories, numerical simulations as well as experimental techniques have encountered many difficulties in dealing with frustrated systems. This volume highlights the latest theoretical, numerical and experimental developments in the field.The book is intended for post-graduate students as well as researchers in statistical physics, magnetism, materials science and various domains where real systems can be described with the spin language. Explicit demonstrations of formulae and full arguments leading to important results are given.

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December 10, 2024

Spectroscopic Study on Charge-Spin-Orbital Coupled Phenomena in Mott-Transition Oxides

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Free Download Spectroscopic Study on Charge-Spin-Orbital Coupled Phenomena in Mott-Transition Oxides By Masaki Uchida (auth.)
2013 | 103 Pages | ISBN: 4431542965 | PDF | 6 MB
In this thesis the author presents the results of extensive spectroscopy experiments beyond the bounds of each transition element to clarify the origins of characteristic spectral features and charge dynamics in charge-spin-orbital coupled phenomena in Mott-transition oxides. Several counterpart 3d transition-metal oxides were adopted as model systems suitable for examining the mechanisms involved, and their electronic structures were systematically investigated using three main spectroscopy methods. Comparative studies on the charge dynamics and Mott transition features of transition-metal oxides were performed: Charge dynamics and thermoelectricity in a typical Mott transition system La1−xSrxVO3, charge dynamics in a doped valence-bond solid system (Ti1−xVx)2O3 and in layered nickelates R2-xSrxNiO4 with charge-ordering instability are investigated thoroughly. The results obtained successfully provide a number of novel insights into the emergent phenomena near the Mott transition.

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September 29, 2024

Confronting the Presidents No Spin Assessments from Washington to Biden [Audiobook]

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Free Download Confronting the Presidents: No Spin Assessments from Washington to Biden (Audiobook)
English | ASIN: B0CW7WZJVZ | 2024 | 16 hours and 26 minutes | M4B@64 kbps | 484 MB
Author: Bill O’Reilly, Martin Dugard
Narrator: Robert Petkoff
Every American president, from Washington to Biden: Their lives, policies, foibles, and legacies, assessed with clear-eyed authority and wit. From Washington to Jefferson, Lincoln to Franklin Delano Roosevelt, Kennedy to Nixon, Reagan to Obama and Biden, the 45 United States presidents have left lasting impacts on our nation. Some of their legacies continue today, some are justly forgotten, and some have changed as America has changed. Whether famous, infamous, or obscure, all the presidents shaped our nation in unexpected ways. The authors’ extensive research has uncovered never before seen historical facts based on private correspondence and newly discovered documentation, such as George Washington’s troubled relationship with his mother. In Confronting the Presidents, O’Reilly and Dugard present 45 wonderfully entertaining and insightful portraits of each president, with no-spin commentary on their achievements-or lack thereof. These and many more questions are answered in each fascinating chapter of Confronting the Presidents. Written with O’Reilly and Dugard’s signature style, authority, and eye for telling detail, Confronting the Presidents will delight all listeners of history, politics, and current affairs, especially during the 2024 election season.

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September 24, 2024

Introductory Lectures on Higher-Spin Theories

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Free Download Introductory Lectures on Higher-Spin Theories by Stefan Fredenhagen
English | PDF EPUB (True) | 2024 | 465 Pages | ISBN : 3031596552 | 41.7 MB
The book offers a pedagogical introduction to higher-spin gauge theories. These theories build upon fundamental gauge theories that are crucial for understanding core interactions. Electromagnetism and nuclear forces are associated with gauge fields of spin 1, while gravity can be conceptualized as a gauge theory of spin 2. This prompts the intriguing inquiry: do higher-spin gauge theories exist? Such theories would extend gravity, incorporating massless gauge fields of spins higher than two. They appear to bear connections to string theory and offer a captivating framework for exploring gravity and aspects of quantum gravity.

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